FAQ Database Discussion Community


Implementing a dictionary function to calculate the average of a list

python,list,dictionary
As always, I've attempted this for awhile before I proceed to ask a question on here. I know there are several attempts at answering this, but none really worked for what I needed. Here are the instructions: Implement the following three functions (you should use an appropriate looping construct to...

SQLAlchemy. 2 different relationships for 1 column

python,sqlalchemy
I have a simple many-to-many relationship with associated table: with following data: matches: users: users_mathces: ONE user can play MANY matches and ONE match can involve up to TWO users I want to realize proper relationships in both "Match" and "User" classes users_matches_table = Table('users_matches', Base.metadata, Column('match_id', Integer, ForeignKey('matches.id', onupdate="CASCADE",...

Django: html without CSS and the right text

python,html,css,django,url
First of all, this website that I'm trying to build is my first, so take it easy. Thanks. Anyway, I have my home page, home.html, that extends from base.html, and joke.html, that also extends base.html. The home page works just fine, but not the joke page. Here are some parts...

Selecting Data from Last Week in Python

python,datetime,pandas,format,dataframes
I have a large database and I am looking to read only the last week for my python code. My first problem is that the column with the received date and time is not in the format for datetime in pandas. My input (Column 15) looks like this: recvd_dttm 1/1/2015...

Put a QLineEdit() into a QTreeWidgetItem()

python,python-3.x,pyqt,pyqt5
Is it possible to put a QLineEdit() into a QTreeWidgetItem() in order to modify the text of the QTreeWidgetItem ? Here is my code def addItemsToTree(self, parent, text, checkable=False, expanded=True): self.item = QTreeWidgetItem(parent, [text]) if checkable: self.item.setCheckState(0, Qt.Unchecked) else: self.item.setFlags(self.item.flags() & ~Qt.ItemIsUserCheckable) self.item.setExpanded(expanded) min = QLineEdit() max = QLineEdit() self.addChildTree(self.item,...

How do variables inside python modules work?

python,module,python-module
I am coming from a Java background with Static variables, and I am trying to create a list of commonly used strings in my python application. I understand there are no static variables in python so I have written a module as follows: import os APP_NAME = 'Window Logger' APP_DATA_FOLDER_PATH...

Count function counting only last line of my list

python,python-2.7
Count function counting only last line of my list N = int(raw_input()) cnt = [] for i in range(N): string = raw_input() for j in range(1,len(string)): if string[j] =='K': cnt.append('R') elif string[j] =='R': cnt.append('R') if string[0] == 'k': cnt.append('k') elif string[0] == 'R': cnt.append('R') print cnt.count('R') if I am giving...

Sum of two variables in RobotFramework

python,automated-tests,robotframework
I have two variables: ${calculatedTotalPrice} = 42,42 ${productPrice1} = 43,15 I executed ${calculatedTotalPrice} Evaluate ${calculatedTotalPrice}+${productPrice1} I got 42,85,15 How can I resolve it?...

Sort when values are None or empty strings python

python,list,sorting,null
I have a list with dictionaries in which I sort them on different values. I'm doing it with these lines of code: def orderBy(self, col, dir, objlist): if dir == 'asc': sorted_objects = sorted(objlist, key=lambda k: k[col]) else: sorted_objects = sorted(objlist, key=lambda k: k[col], reverse=True) return sorted_objects Now the problem...

Python Popen - wait vs communicate vs CalledProcessError

python,python-2.7,error-handling,popen
Continuing from my previous question I see that to get the error code of a process I spawned via Popen in python I have to call either wait() or communicate() (which can be used to access the Popen stdout and stderr attributes): app7z = '/path/to/7z.exe' command = [app7z, 'a', dstFile.temp,...

python 'ascii' codec can't encode characters

python
I am very new to python. I am trying to send messages to android CCS server using a python script. I get the messages from RabbitMQ and then send it to CCS through XMPP. My code is based on the example code from android website. It looks like the below:...

SyntaxError: invalid syntax?

python,syntax
Good afternoon, I am developing a script in python and while I am trying to compile it from the terminator/terminal i always get this error, but I cannot understand where is the syntax error? File "_case1.py", line 128 print ('########################') ^ SyntaxError: invalid syntax Then I just change the position...

The event loop is already running

python,python-3.x,pyqt,pyqt4
I have the following 5 files: gui.py # -*- coding: utf-8 -*- from PyQt4 import QtCore, QtGui try: _fromUtf8 = QtCore.QString.fromUtf8 except AttributeError: def _fromUtf8(s): return s try: _encoding = QtGui.QApplication.UnicodeUTF8 def _translate(context, text, disambig): return QtGui.QApplication.translate(context, text, disambig, _encoding) except AttributeError: def _translate(context, text, disambig): return QtGui.QApplication.translate(context, text, disambig)...

When I write to two files in python, the second one is always empty

python,file-io
I'm working on a simple python script to write some data to two text files. My code looks like this: with open('file1.txt', 'w') as file1: for thing in stuff1: file1.write(thing + '\n') with open('file2.txt', 'w') as file2: for thing in stuff2: file2.write(thing + '\n') When I run the program, file1...

Inserting a variable in MongoDB specifying _id field

python,mongodb,pymongo
I want to insert a variable, say, a = {1:2,3:4} into my database with a particular id "56". It is very clear from the docs that I can do the following: db.testcol.insert({"_id": "56", 1:2, 3:4}) However, I cannot figure out any way to insert "a" itself, specifying an id. In...

Django MySQLClient pip compile failure on Linux

python,linux,django,gcc,pip
Django documentation as of v1.8 recommends using mysqlclient connector for the framework. I'm attempting to pip install the package on Ubuntu 14.04 with Python 3.4 and running into a GCC error that I'm unable to find reference to. I'm not an expert on compiling software, so was hoping somebody can...

Failing to convert column in pandas dataframe to integer data type

python,pandas
I have this code which manipulates a data set to create a new column by pulling info from an existing column. In order to match the data properly using a pd.merge function with another data set, I would like to convert the 'Channel ID' column to integers. Despite the current...

Python Pandas: select rows based on comparison across rows

python,indexing,pandas
In the dataframe below, the first column is the index with occasional non-unique values. | | col1 | |---|------| | A | 120 | | A | 90 | | A | 80 | | B | 80 | | B | 50 | | C | 120 | |...

ctypes error AttributeError symbol not found, OS X 10.7.5

python,c++,ctypes
I have a simple test function on C++: #include <stdio.h> #include <string.h> #include <stdlib.h> #include <locale.h> #include <wchar.h> char fun() { printf( "%i", 12 ); return 'y'; } compiling: gcc -o test.so -shared -fPIC test.cpp and using it in python with ctypes: from ctypes import cdll from ctypes import c_char_p...

python itertools combinations logic

python,environment-variables,itertools,scopes
I'm looking at the code for the combinations on the python documentation for itertools (https://docs.python.org/2/library/itertools.html) def combinations(iterable, r): # combinations('ABCD', 2) --> AB AC AD BC BD CD # combinations(range(4), 3) --> 012 013 023 123 pool = tuple(iterable) n = len(pool) if r > n: return indices = range(r)...

Python regular expression, matching the last word

python,regex,list
I've the following problem. I'm looking to find all words in a string that typically looks like so HelloWorldToYou Notice, each word is capitalized as a start followed by the next word and so on. I'm looking to create a list of words from it. So the final expected output...

How to put an image on another image in python, using ImageTk?

python,user-interface,tkinter
I want to put an image in front of another one, then use this combined image as a button's background image in Tkinter. How can I do it? I am free to import Tkimage, Image. Clarify: I want to stick this on the center of this so that something like...

How to get a pizza program to round to a full pizza In PYTHON [duplicate]

python,math,rounding
This question already has an answer here: How do you round UP a number in Python? 9 answers Python round up integer to next hundred 6 answers so i'm making a pizza program in Python 3.3 that takes input from the user and prints the amount of pizza's needed....

group indices of list in list of lists

python,list
I am looking for an elegant solution for the following problem. I have a list of ints and I want to create a list of lists where the indices with the same value are grouped together in the order of the occurrences of said list. [2, 0, 1, 1, 3,...

Dropping Columns in a Dataframe based on if they have a particular letter in the title

python,pandas
Is there a way to drop columns in a Dataframe with column names having a particular letter as I wasn't able to find any information on this? I currently have the following code, which creates a dataframe that look as follows: dates BETA0 BETA1 BETA2 BETA3 SVEN1F01 \ 0 2015-06-17...

Python recursive function not recursing

python,recursion
I'm trying to solve a puzzle, which is to reverse engineer this code, to get a list of possible passwords, and from those there should be one that 'stands out', and should work function checkPass(password) { var total = 0; var charlist = "abcdefghijklmnopqrstuvwxyz"; for (var i = 0; i...

Pandas Dataframe Complex Calculation

python,python-2.7,pandas,dataframes
I have the following dataframe,df: Year totalPubs ActualCitations 0 1994 71 191.002034 1 1995 77 2763.911781 2 1996 69 2022.374474 3 1997 78 3393.094951 I want to write code that would do the following: Citations of currentyear / Sum of totalPubs of the two previous years I want something to...

Python - Opening and changing large text files

python,replace,out-of-memory,large-files
I have a ~600MB Roblox type .mesh file, which reads like a text file in any text editor. I have the following code below: mesh = open("file.mesh", "r").read() mesh = mesh.replace("[", "{").replace("]", "}").replace("}{", "},{") mesh = "{"+mesh+"}" f = open("p2t.txt", "w") f.write(mesh) It returns: Traceback (most recent call last): File...

Replace nodejs for python?

python,node.js,webserver
i'm working in a HTML5 multiplayer game, and i need a server to sync player's movement, chat, battles, etc. So I'm looking for ways to use python instead nodejs, because i have I have more familiarity with python. The server is simple: var express = require('express'); var app = express();...

Calling function and passing arguments multiple times

python,function,loops
I want to call the function multiple time and use it's returned argument everytime when it's called. For example: def myfunction(first, second, third): return (first+1,second+1,third+1) 1st call: myfunction(1,2,3) 2nd call is going to be pass returned variables: myfunction(2,3,4) and loop it until defined times. How can I do such loop?...

Convert batch command to python

python,batch-file
I am trying to convert a .bat file to python, almost everything is working fine, only the compression part is not working, I point out the flags and the path to the "rar.exe", but it's not working at all in the python version. What I need to correct to have...

How can I control the color and opacity of each point in a python scatter plot?

python,colors,opacity,scatter-plot,4d
I'm looking to graph a 4D data set (X, Y, Z, intensity) using opacity to represent intensity. I also want the color to be dependent on the Z variable as well to better show depth. Here is the relevant code so far, I am a novice when it comes to...

Why does the update method in Tkinter cause the window to freeze?

python,tkinter,tkinter-canvas
First of all, I know Tkinter isn't thread safe and this problem has something to do with that but I wanted to find out formally why this code makes a window that displays but is unresponsive. from Tkinter import * root = Tk() c = Canvas() c.pack() c.create_line(10,10, 30, 30)...

Tkinter fast reader

python,tkinter
I have a problem in implementing a fast reader program with tkinter, and that is because it hangs after ~5 seconds. I know that is because of the while loop but I didn't figured out a way to solve it. Maybe looping outside of the root mainloop? Here is the...

sys.argv in a windows environment

python,windows,python-3.x
I'm attempting to learn python using the book 'a byte of python'. The code: import sys print('the command line arguments are:') for i in sys.argv: print(i) print('\n\nThe PYTHONPATH is', sys.path, '\n') outputs: the command line arguments are: C:/Users/user/PycharmProjects/helloWorld/module_using_sys.py The PYTHONPATH is ['C:\\Users\\user\\PycharmProjects\\helloWorld', 'C:\\Users\\user\\PycharmProjects\\helloWorld', 'C:\\Python34\\python34.zip', 'C:\\Python34\\DLLs', 'C:\\Python34\\lib', 'C:\\Python34', 'C:\\Python34\\lib\\site-packages']...

How to create series of pandas dataframe by iteration

python,loops,pandas
I want to create df_2008 to df_2014 from an original df by iteration. df has columns names '2008' to '2014' and I want to seperate them into different dfs. I tried for i in range(2008, 2015): 'df_'+str(i)=df[str(i)] Which won't work. I would really appreciate it if anyone could help me....

How do I read this list and parse it?

python,list
I'm using requests and the output I get from the sites API is a list, I've been stuck trying to parse it to get the data from it. I use r = requests.get(urlas, params=params) r.json() to get the data I want. Here is a snippet of the list [{'relation_type': None,...

Using an Abstract Base class as an argument to a function (Python)

python
If I have an Abstract Base Class called BaseData which has the function update which is overridden with different functionality in its Child Classes, can I have a function as follows, where I want the function to take any Child Class as an argument and call the update function for...

Pass function call as a function argument

python,python-2.7,python-3.x
Code: def function1(a,b): return a-1,b-1 def function2(c,d): return c+1,d+1 print function1(function2(1,2)) Error: Traceback (most recent call last): File "C:\Users\sony\Desktop\Python\scripts\twitter_get_data.py", line 6, in <module> print function1(function2(1,2)) TypeError: function1() takes exactly 2 arguments (1 given) [Finished in 0.1s with exit code 1] Why the above error? ...

Using counter on array for one value while keeping index of other values

python,collections
After reading the answers on this question How to count the frequency of the elements in a list? I was wondering how to count the frequency of something, and at the same time retreive some extra information, through something like an index. For example a = ['fruit','Item#001'] b = ['fruit','Item#002']...

represent an index inside a list as x,y in python

python,list,numpy,multidimensional-array
I have a list which contains 1000 integers. The 1000 integers represent 20X50 elements of dimensional array which I read from a file into the list. I need to walk through the list with an indicator in order to find close elements to each other. I want that my indicator...

Extracting strings from HTML with Python wont work with regex or BeautifulSoup

python,regex,parsing,beautifulsoup,python-requests
Im using Python 2.7, BeautifulSoup4, regex, and requests on windows 7. I've scraped some code from a website and I am having problems parsing and extracting the bits I want and storing them in a dictionary. What I'm after is text that is presented as follows in the code: @CAD_DTA\">I...

Matplotlib: Plot the result of an SQL query

python,sql,matplotlib,plot
from sqlalchemy import create_engine import _mssql from matplotlib import pyplot as plt engine = create_engine('mssql+pymssql://**:[email protected]:1433/AffectV_Test') connection = engine.connect() result = connection.execute('SELECT Campaign_id, SUM(Count) AS Total_Count FROM Impressions GROUP BY Campaign_id') for row in result: print row connection.close() The above code generates an array: (54ca686d0189607081dbda85', 4174469) (551c21150189601fb08b6b64', 182) (552391ee0189601fb08b6b73', 237304) (5469f3ec0189606b1b25bcc0',...

Spring-integration scripting with Python

python,spring-integration,jython
I'm trying to use Python with spring-integration and jython-standalone-2.7.0: Here is my application context: <int:inbound-channel-adapter id="in" channel="exampleChannel" > <int:poller fixed-rate="1000" /> <int-script:script lang="python" location="script/message.py" /> </int:inbound-channel-adapter> <int:channel id="exampleChannel" /> <int-ip:udp-outbound-channel-adapter id="udpOut" channel="exampleChannel" host="192.168.0.1" port="11111" /> Here is my script in Python: print "Python"...

Ignoring future dates in python

python,datetime,pandas,dataframes
I have a large database and I am looking to read only the last week for my python code. However, somebody made a typo in the database so there is a date in the future that is throwing everything off. Input: recvd_dttm 6/5/2015 18:28:50 PM 6/5/2015 14:25:43 PM 9/10/2015 21:45:12...

Sending live video frame over network in python opencv

python,opencv,numpy
I'm trying to send live video frame that I catch with my camera to a server and process them. I'm usig opencv for image processing and python for the language. Here is my code client_cv.py import cv2 import numpy as np import socket import sys import pickle cap=cv2.VideoCapture(0) clientsocket=socket.socket(socket.AF_INET,socket.SOCK_STREAM) clientsocket.connect(('localhost',8089))...

Include package in Spark local mode

python,apache-spark,py.test,pyspark
I'm writing some unit tests for my Spark code in python. My code depends on spark-csv. In production I use spark-submit --packages com.databricks:spark-csv_2.10:1.0.3 to submit my python script. I'm using pytest to run my tests with Spark in local mode: conf = SparkConf().setAppName('myapp').setMaster('local[1]') sc = SparkContext(conf=conf) My question is, since...

trying to understand LSH through the sample python code

python,similarity,locality-sensitive-hash
the concise python code i study for is here Question A @ line 8 i do not really understand the syntax meaning for "res = res << 1" for the purpose of "get_signature" Question B @ line 49 (SOLVED BY myself through another Q&A) "xor = r1^r2" does not really...

Twilio Client Python not Working in IOS Browser

javascript,python,ios,flask,twilio
I have created a simple twilio client application to make phone calls from Web Browser to phones. I used a sample Flask app to generate a secure Capability Token and used twilio.min.js library to handle calls from my HTML. The functionality works fine in Computer Browsers ans Android Phone Browsers,...

List of tuples from (a, all b) to (b, all a)

python,list,python-2.7,tuples
I am starting with a list of tuples (a,all b). I want to end with a list of tuples (b,all a). For example: FROM (a1,[b1,b2,b3]) (a2,[b2]) (a3,[b1,b2]) TO (b1,[a1,a3]) (b2[a1,a2,a3]) (b3,[a1] How do I do this using Python 2? Thank you for your help....

Peewee: reducing where conditionals break after a certain length

python,peewee
This is what I have: SomeTable.select.where(reduce(operator.or_, (SomeTable.stuff == entry for entry in big_list))) The problem arises when I have a relatively large list of elements in big_list and I get this: RuntimeError: maximum recursion depth exceeded Is there another way to approach this that doesn't involve splitting up the list...

Watching a variable in python?

python,reference
In C++, I could imagine constructing with a reference to a counter ( see below ), and then a function would just dereference the address to get a value. Is something similar possible in python? Something like: import time class Count_Watcher: def __init__( self, to_watch ): self.to_watch = to_watch sleep_watch()...

Python: can't access newly defined environment variables

python,bash,environment-variables
I can't access my env var: import subprocess, os print os.environ.get('PATH') # Works well print os.environ.get('BONSAI') # doesn't work But the env var is well added in my /home/me/.bashrc: BONSAI=/home/me/Utils/bonsai_v3.2 export BONSAI And I can access this env var from a new terminal....

Django template not found in main project directory error

python,django,templates
I am getting a 'template not found' error, although I've set up a correct template hierarchy (or so I thought) . ├── manage.py ├── twinja │   ├── admin.py │   ├── admin.pyc │   ├── __init__.py │   ├── __init__.pyc │   ├── migrations │   │   ├── __init__.py │   │   └── __init__.pyc │   ├──...

how to enable a entry by clicking a button in Tkinter?

python,tkinter
I need to activate many entries when button is clicked please do not write class based code, modify this code only because i need to change the whole code for the project as i did my whole project without classes from Tkinter import * import ttk x='disabled' def rakhi(): global...

Using a subset of Pandas dataframe with Scipy Kmeans?

python,pandas,scipy
I have a data frame that I import using df = pd.read_csv('my.csv',sep=','). In that CSV file, the first row is the column name, and the first column is the observation name. I know how to select a subset of the Panda dataframe, using: df.iloc[:,1::] which gives me only the numeric...

Django: show newlines from admin site?

python,html,django,newline,textfield
This is probably very simple. My database objects have a TextField. Now, when I add the contents of the TextFields to an html paragraph, there are no new lines. How can I make Django show those newlines? Thank you!

Would using Vagrant be overkill? [on hold]

python,windows,ubuntu,vagrant,virtualbox
I'm a developer-hobbyist running Windows 8.1 on a Yoga 2 Pro. I mostly do Python/Django work but I think I'm gonna pick up Ruby soon. The thing is, Windows always seems to be the limiting factor for any project I want to pick up. Last time I tried to install...

Find the tf-idf score of specific words in documents using sklearn

python,scikit-learn,tf-idf
I have code that runs basic TF-IDF vectorizer on a collection of documents, returning a sparse matrix of D X F where D is the number of documents and F is the number of terms. No problem. But how do I find the TF-IDF score of a specific term in...

Python: histogram/ binning data from 2 arrays.

python,histogram,large-files
I have two arrays of data: one is a radius values and the other is a corresponding intensity reading at that intensity: e.g. a small section of the data. First column is radius and the second is the intensities. 29.77036614 0.04464427 29.70281027 0.07771409 29.63523525 0.09424901 29.3639355 1.322793 29.29596385 2.321502 29.22783249...

Rebin data and update imshow plot

python,numpy,matplotlib,draw,imshow
I have a large data set I want to be able to "zoom" in on. What I really want is for the data to be rebinned based on the selection and then update the data in the graph. So the graph will show different limits but maintain the same resolution....

Google App Engine datastore: filter()

python,google-app-engine
I'm trying to retrieve an entry from Google App Engine's datastore using the filter() method as follows: result = Sender.all().filter("email =", email).filter("source_address =", source).filter("dest_address =", dest).filter("food_type =", food_type) Then, if such an entry exists, I change the value of one of the columns in that entry. Otherwise, I'm displaying an...

Pandas difference between dataframes on column values

python,pandas,dataframes,difference
I couldn't find a way to have a dataframe that has the difference of 2 dataframes based on a column. So basically: dfA = ID, val 1, test 2, other test dfB = ID, val 2, other test I want to have a dfC that holds the difference dfA -...

Looking for elements in a set

python,set
I'm a little confused on which data structure to use to compare if an element matches another element in a set. Lets say user_input asks the user to type in their name. if their name matches up they are granted access but this doesn't work. access = set(['John', 'Jane', 'Jack',...

In sklearn, does a fitted pipeline reapply every transform?

python,scikit-learn,pipeline,feature-selection
Apologies if this is obvious but I couldn't find a clear answer to this: Say I've used a pretty typical pipeline: feat_sel = RandomizedLogisticRegression() clf = RandomForestClassifier() pl = Pipeline([ ('preprocessing', preprocessing.StandardScaler()), ('feature_selection', feat_sel), ('classification', clf)]) pl.fit(X,y) Now when I apply pl on a new set, pl.predict(X_classify); is RandomizedLogisticRegression going...

Rotating a Label In Qt with Python

python,qt
I'm somewhat new to Qt and was wondering how to rotate a Label that has a pixmap inside of it. I've tried somethings like this: def paintEvent (self, event): t = QtGui.QTransform() image = QtGui.QImage(_fromUtf8(":/icons/BOOM_OUT.png")) pixmap = QtGui.QPixmap.fromImage(image) self.label.setPixmap(pixmap) t.translate(400,300) t.rotate(45) p = QtGui.QPainter(self) p.setTransform(t) p.drawPixmap((-pixmap.width()/2),(-pixmap.height()/2), pixmap) p.end() I know...

BeautifulSoup: Parsing bad Wordpress HTML

python,html,regex,wordpress,beautifulsoup
So I need to scrape some a site using Python but the problem is that the markup is random, unstructured, and proving hard to work with. For example <p style='font-size: 24px;'> <strong>Title A</strong> </p> <p> <strong> First Subtitle of Title A </strong> "Text for first subtitle" </p> Then it will...

How do I isolate the text between 2 delimiters on the left and 7 delimiters on the right in Python?

python,regex,string,split
I have a string: string = ""7807161604","Sat Jan 16 00:00:57 +0000 2010","Global focus begins tonight. Pretty interested to hear more about it.","Madison Alabama","al","17428434","81","51","Sun Nov 16 21:46:24 +0000 2008","243" I only want the text: "Global focus begins tonight. Pretty interested to hear more about it."" which is between the 2nd and...

Show message when there's no excerpt - Django templates

python,django,django-templates,django-template-filters
I have this field on a Django template: <p class="border_dotted_bottom"> {{ expert.description|slice:":300" }} <a href="{% url 'profile' expert.username %}">{% trans "read more" %}</a>.... </p> If this object (user) has no 'decription' (a text field) it shows the word 'None', I need to get rid of that, maybe if he doesn't...

How to set first column to a constant value of an empty np.zeros numPy matrix?

python,numpy,matrix,modeling
I'm working on setting some boundary conditions for a water table model, and I am able to set the entire first row to a constant value, but not the entire first column. I am using np.zeros((11,1001)) to make an empty matrix. Does anyone know why I am successful at defining...

BeautifulSoup is not getting all data, only some

python,html,web-scraping,beautifulsoup,html-parsing
import requests from bs4 import BeautifulSoup def trade_spider(max_pages): page = 0 while page <= max_pages: url = 'http://orangecounty.craigslist.org/search/foa?s=' + str(page * 100) source_code = requests.get(url) plain_text = source_code.text soup = BeautifulSoup(plain_text) for link in soup.findAll('a', {'class':'hdrlnk'}): href = 'http://orangecounty.craigslist.org/' + link.get('href') title = link.string print title #print href get_single_item_data(href) page...

find indices x,y of a matrix of specific values in python

python,matrix,multidimensional-array,indices
I convert a list of integers to a two dimensinal array like this: data = numpy.array( l ) shape = ( 10, 30 ) data = data.reshape( shape ) I try to get the indices x,y of the matrix of the values that are bigger than some threshold and lower...

Is there a way to say for every x values, do this?

python,python-2.7
Before I start, I am new to Python, so any low-level description would be incredibly helpful! I have a list of lets say 60 values (representing one hour, from 8:00-9:00) and I want to run average, maximums, minimums, and standard deviation for each set of 15. (I already have the...

Find the common values in columns in Pandas dataframe

python,pandas
I have the data frame of the style: animal animal A Dog Dog B Cat Cat C Pig Pig D Cat Dog The different entries in row D tell me there is an error. I need to remove all rows where the animals are not the same. The columns do...

_winreg.SaveKey Error - A required privilege is not held by the client

python,registry,privileges,winreg
I want to save the registry key "Run" using _winreg in Python. This is my code: import _winreg key = _winreg.OpenKey(_winreg.HKEY_LOCAL_MACHINE, r'Software\Microsoft\Windows\CurrentVersion\Run') _winreg.SaveKey(key, "C:\key.reg") When executing, I get a Windows error message: "A required privilege is not held by the client" Can anyone see what is wrong?...

How do I copy a row from one pandas dataframe to another pandas dataframe?

python,python-2.7,pandas,dataframes
I have a dataframe of data that I am trying to append to another dataframe. I have tried various ways with .append() and there has been no successful way. When I print the data from iterrows. I provide 2 possible ways I tried to solve the issue below, one creates...

Identify that a string could be a datetime object

python,regex,algorithm,python-2.7,datetime
If I knew the format in which a string represents date-time information, then I can easily use datetime.datetime.strptime(s, fmt). However, without knowing the format of the string beforehand, would it be possible to determine whether a given string contains something that could be parsed as a datetime object with the...

Strange Behavior: Floating Point Error after Appending to List

python,python-2.7,behavior
I am writing a simple function to step through a range with floating step size. To keep the output neat, I wrote a function, correct, that corrects the floating point error that is common after an arithmetic operation. That is to say: correct(0.3999999999) outputs 0.4, correct(0.1000000001) outputs 0.1, etc. Here's...

How does the class_weight parameter in scikit-learn work?

python,scikit-learn
I am having a lot of trouble understanding how the class_weight parameter in scikit-learn's Logistic Regression operates. The Situation I want to use logistic regression to do binary classification on a very unbalanced data set. The classes are labelled 0 (negative) and 1 (positive) and the observed data is in...

How to change the IP address of Amazon EC2 instance using boto library

python,amazon-web-services,boto
How can I assign a new IP address (or Elastic IP) to an already existing AWS EC2 instance using boto library.

odoo v8 - Field(s) `arch` failed against a constraint: Invalid view definition

python,xml,view,odoo,add-on
I want to create a new view with a DB-view. When I try to install my app, DB-view was created then I get error: 2015-06-22 12:59:10,574 11988 ERROR odoo openerp.addons.base.ir.ir_ui_view: Das Feld `datum` existiert nicht Fehler Kontext: Ansicht `overview.tree.view` [view_id: 1532, xml_id: k. A., model: net.time.overview, parent_id: k. A.] 2015-06-22...

SciKit-learn for data driven regression of oscillating data

python,time-series,scikit-learn,regression,prediction
Long time lurker first time poster. I have data that roughly follows a y=sin(time) distribution, but also depends on other variables than time. In terms of correlations, since the target y-variable oscillates there is almost zero statistical correlation with time, but y obviously depends very strongly on time. The goal...

'int' object and 'float' object not callable error

python
I have a post request returning a list: [u'2'] I am trying to extract the number and turn it into and integer but I keep getting either 'float' object not callable or 'int' object not callable. Here is what I have tried so far: speed = [u'2'] strSpeed = speed[3]...

Pandas - Dropping multiple empty columns

python,pandas
I have some tables where the first 11 columns are populated with data, but all columns after this are blank. I tried: df=df.dropna(axis=1,how='all') which didn't work. I then used: df = df.drop(df.columns[range(11,36)], axis=1) Which worked on the first few tables, but then some of the tables were longer or shorter...

How to check if a file is checked out (Clearcase / Python)

python,clearcase,python-2.4
I guess the title sufficiently sums up my question. I have working code to automatically check out a file: p = Popen(['cleartool', 'co', pathname], stdin = PIPE) p.communicate('comment for checkout') I'm wondering how to check if the file is already checked out before executing this. Thanks in advance everyone!...

Python: how to group similar lists together in a list of lists?

python
I have a list of lists in python. I want to group similar lists together. That is, if first three elements of each list are the same then those three lists should go in one group. For eg [["a", "b", "c", 1, 2], ["d", "f", "g", 8, 9], ["a", "b",...

Create an exe with Python 3.4 using cx_Freeze

python,python-3.4,cx-freeze
I have found two other articles about this problem on Stack Exchange but none of them has a clear answer: is it possible to create a .exe of a Python 3.4 script? The only solution I found was to use cx_Freeze. I used it, and it indeed created an executable...

How to check for multiple attributes in a list

python,python-2.7
I am making a TBRPG game using Python 2.7, and i'm currently making a quest system. I wanted to make a function that checks all of the quests in a list, in this case (quests), and tells you if any of of the quests in the list have the same...

Can't get value from xpath python

python,html,xpath,web-scraping,html-parsing
I want to get values from page: http://www.tabele-kalorii.pl/kalorie,Actimel-cytryna-miod-Danone.html I can get all values from first section, but I can't get values from table "Wartości odżywcze" I use this xpath: ''.join(tree2.xpath("//html/body/div[1]/div[3]/article/div[2]/div/div[4]/div[3]/div/div[1]/div[3]/table[1]/tr[3]/td[2]/span/text()")) But I'm not getting anything. With xpath like this: ''.join(tree2.xpath("//html/body/div[1]/div[3]/article/div[2]/div/div[4]/div[3]/div/div[1]/div[3]/table[1]/tr[3]/td[2]//text()")) I'm...

Parse text from a .txt file using csv module

python,python-2.7,parsing,csv
I have an email that comes in everyday and the format of the email is always the same except some of the data is different. I wrote a VBA Macro that exports the email to a text file. Now that it is a text file I want to parse the...

Can python script know the return value of C++ main function in the Android enviroment

python,c++
There are several ways of calling C++ executable programs. For example, we can use def run_exe_return_code(run_cmd): process=subprocess.Popen(run_cmd,stdout=subprocess.PIPE,shell=True) (output,err)=process.communicate() exit_code = process.wait() print output print err print exit_code return exit_code to process a C++ executable program: run_exe_return_code('abc') while abc is created by the following C++ codes: int main() { return 1;...

Python np.delete issue

python,numpy
A = np.array([[1,2,3],[3,4,5],[5,6,7]]) X = np.array([[0, 1, 0]]) for i in xrange(np.shape(X)[0]): for j in xrange(np.shape(X)[1]): if X[i,j] == 0.0: A = np.delete(A, (j), axis=0) I am trying to delete j from A if in X there is 0 at index j. I get IndexError: index 2 is out of...

How to remove structure with python from this case?python,python-2.7
How to remove "table" from HTML using python? I had case like this: paragraph = ''' <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Quidem molestiae consequuntur officiis corporis sint.<br /><br /> <table> <tr> <td> text title </td> <td> text title 2 </td> </tr> </table> <p> lorem ipsum</p> ''' how...

Python match whole file name, not just extension

python,regex,nsregularexpression
Objective: Use Python regex to return a list of filenames have certain file extensions. List of files: X8SIA9.ROM X8SIA0.rom X8SIA0.928 Regex to find files that end in *.ROM or 3x numbers: bios_file = re.findall(r'.*\.(rom|[0-9]{3})+', name, re.I) Issue: bios_file is returning ['ROM'], ['rom'], [928]. bios_file should be returning the entire filename...

MySQLdb Python - Still getting error when using CREATE TABLE IF NOT EXISTS

python,mysql
I'm using this code to create a database with tables in Python: def CreateDatabase(): global DB_CNX global DB_NAME cursor = DB_CNX.cursor() cursor.execute("""CREATE DATABASE IF NOT EXISTS {} DEFAULT CHARACTER SET 'utf8'""".format(DB_NAME)) cursor.execute("""CREATE TABLE IF NOT EXISTS NAMES(NAME VARCHAR(50) PRIMARY KEY NOT NULL)""") DB_CNX.close() But even if I use the syntax...

How to use template within Django template?

python,html,django,templates,django-1.4
I have the django template like below: <a href="https://example.com/url{{ mylist.0.id }}" target="_blank"><h1 class="title">{{ mylist.0.title }}</h1></a> <p> {{ mylist.0.text|truncatewords:50 }}<br> ... (the actual template is quite big) It should be used 10 times on the same page, but 'external' html elements are different: <div class="row"> <div class="col-md-12 col-lg-12 block block-color-1"> *django...

Displaying a 32-bit image with NaN values (ImageJ)

python,image-processing,imagej
I wrote a multilanguage 3-D image denoising ImageJ plugin that does some operations on an image and returns the denoised image as a 1-D array. The 1-D array contains NaN values (around the edges). The 1-D array is converted back into an image stack and displayed. It is simply black....

How to match words in 2 list against another string of words without sub-string matching in Python?

python,regex,string,loops,twitter
I have 2 lists with keywords in them: slangNames = [Vikes, Demmies, D, MS Contin] riskNames = [enough, pop, final, stress, trade] i also have a dictionary called overallDict, that contains tweets. The key value pairs are {ID: Tweet text) For eg: {1:"Vikes is not enough for me", 2:"Demmies is...

Inconsistency between gaussian_kde and density integral sum

python,numpy,kernel-density
Can one explain why after estimation of kernel density d = gaussian_kde(g[:,1]) And calculation of integral sum of it: x = np.linspace(0, g[:,1].max(), 1500) integral = np.trapz(d(x), x) I got resulting integral sum completely different to 1: print integral Out: 0.55618 ...

REGEX python find previous string

python,regex,string
I'm trying to find if the last word of the string is followed by a space or a special char, and if yes return the string without this space/special char For example : "do you love dogs ?" ==> return "do you love dogs" "i love my dog " (space...