python,wordpress , String indices must be integers, new to python


String indices must be integers, new to python

Question:

Tag: python,wordpress

I hope I won't get trashed for this question. This is my first day with Python and all I've done so far is copy pasting and deducing from other snippets of code. I have no experience with code. I'm trying my hardest however this one I can't get past for the past few hours.

I'm currently adjusting an Editorial (iOS app) workflow to fit my needs — namely: posting to my WordPress site, including the ability to choose from a list of all possible post formats (I have "standard" and "link" enabled).

Here is the faulty bit from the relevant Python script:

console.show_activity('Fetching formats...')

server = xmlrpclib.ServerProxy(wp_url)

format = server.wp.getPostFormats(wp_blogid, wp_username, wp_password, 'post_format')


i = 0
for x in format:
        formats += '\n' + x['name'] + " " + str(i)
        i = i+1

workflow.set_variable("formats", formats)
console.hide_activity()

I'm getting the error: "string indices must be integers, not str"

What is this supposed to do is later show me in a list my available formats. I've done this successfully with server.wp.getPostFormats(wp_blogid, wp_username, wp_password, 'post_tag') and server.wp.getTerms(wp_blogid, wp_username, wp_password, 'category')

I know my problem is where the line with the i starts, I just have no idea how to solve it. I'm assuming by reading other topics that I need to cast, but I'm not even sure what getPostFormats returns, or how to do that.

Thanks in advance!

Edit: I've now concluded that server.wp.getPostFormats returns a dictionary, but I have not a slightest idea on how to retrieve only one set of data (either the key or value) of this dictionary. Please help.


Answer:

You're getting that error because "string indices must be integers, not str".

    formats += '\n' + x['name'] + " " + str(i)

Here, you are accessing the 'name'th element of x, where 'name' is of course a string and x is a string too, since server.wp.getPostFormats obviously returns a list of strings.

So simply look at format and you should immediately see how to obtain the required data.

UPDATE:

OK, so you figured out that format is a dictionary (returned from server.wp.getPostFormats). In Python, if you iterate over a dictionary (your for-loop), you iterate through its keys. This is the standard behaviour.

Look at this example:

>>> foo = {'a': 1, 'c': 3, 'b': 2}
>>> for x in foo: print(x)
... 
a
c
b

Of course you also need the values, not only the keys (you seem to look for an entry with the key name). One way is to iterate though the keys and items in one shot:

>>> for key, value in foo.iteritems():
...     print(key + ":" + str(value))
... 
a:1
c:3
b:2

So the .iteritems() method of a dictionary returns for every iteration a key/value-pair, which you can unpack within the for loops definition.

In your case, you can do the following:

for key, value in format.iteritems():
    formats += 'key: ' + key + ', value: ' + value + '\n'

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