[SOLVED] Using Python Variables in one Instance

metallica1973 · 07-07-2014, 03:46 PM

I have another basic Pythonic question that I cant seem to figure out. Here we go. So what I am trying to accomplish is simply using a second variable in my "scanjob" variable adding "api_tok". I am using a product that needs an api_token for every call so I just want to persistently add "api_tok" where needed. So far

Code:

    auths = requests.get('http://10.0.0.127:443', auth=('admin', 'blahblah'), headers = heads)
    api_tok = {'api_token=e27e901c196b8f0399bc79'}
    scanjob = requests.get('http://10.0.0.127:4242/scanjob/1?%s'  % (api_tok))
    scanjob.url
    u"http://10.0.0.127:4242/scanjob/1?set(['api_token=e27e901c196b8f0399bc79'])"

as you can see from scanjob.url, its adding a "set" after the "?". Why? If I could remove that "set" my call will work. I tried many different variants of combining a string such as:

Code:

    scanjob = requests.get('http://10.0.0.127:4242/scanjob/1?%s' + api_tok)
    scanjob.url
    u"http://10.0.0.127:4242/scanjob/1?set(['api_token=e27e901c196b8f0399bc79'])"
    scanjob = requests.get('http://10.0.0.127:4242/scanjob/1?' + str(api_tok))
    scanjob.url
    u"http://10.0.0.127:4242/scanjob/1?set(['api_token=e27e901c196b8f0399bc79'])"

??

dugan · 07-07-2014, 04:09 PM

Please pass the URL parameters the usual way instead:

Code:

params = {'api_token': 'e27e901c196b8f0399bc79'}
scanjob = requests.get('http://10.0.0.127:4242/scanjob/1', params=params)

That will work.

And as to why what you were doing did not work:

Code:

api_tok = {'api_token=e27e901c196b8f0399bc79'}

Your results show that that line creates a set containing the string "api_token=e27e901c196b8f0399bc79". This is Python 2.7's set initialization syntax.

What you were trying to write was:

Code:

api_tok = 'api_token=e27e901c196b8f0399bc79'
scanjob = requests.get('http://10.0.0.127:4242/scanjob/1?%s' + api_tok)

Note the removal of the curly braces.

metallica1973 · 07-07-2014, 04:14 PM

many thanks for your reply but I was able to figure it out with some help:

{....} is syntax to produce a set object:

As of Python 2.7, non-empty sets (not frozensets) can be created by placing a comma-separated list of elements within braces, for example: {'jack', 'sjoerd'}, in addition to the set constructor.

For example:

>>> {'api_token=e27e901c196b8f0399bc79'}
set(['api_token=e27e901c196b8f0399bc79'])
>>> {'jack', 'sjoerd'}
set(['jack', 'sjoerd'])

This is where your mystery set([...]) text comes from.

You just wanted to produce a string here:

api_tok = 'api_token=e27e901c196b8f0399bc79'
scanjob = requests.get('http://10.0.0.127:4242/scanjob/1?%s' % api_tok)

Alternatively, tell requests to add the query parameters with the params keyword argument, passing in a dictionary:

parameters = {'api_token': 'e27e901c196b8f0399bc79'}
scanjob = requests.get('http://10.0.0.127:4242/scanjob/1', params=parameters)

This has the added advantage that requests now is responsible for properly encoding the query parameters.