We Keep Coding

AttributeError: 'list' object has no attribute 'expandtabs'

So, to start, I was making a discord bot (using discord.py) and making a help command, but it shows an error when I run the python file
I have no idea what was going on about this... (\n didn't cause the problem)
code (new one):
#client.command(aliases=["commands","cmds"], description="Get command list")
async def help(ctx):
embed = discord.Embed(title="Commands",description="List of the bot's commands",color=0xFF0000)
for commands in client.commands:
embed.add_field(name=commands,value=commands.description)
await ctx.send(embed)
and full error message:
Traceback (most recent call last):
File "C:\Users\Name\Documents\Codes\Python\bot.py", line 19, in <module>
File "C:\Users\Name\AppData\Local\Programs\Python\Python39\lib\site-packages\discord\ext\commands\core.py", line 1262, in decorator
result = command(*args, **kwargs)(func)
File "C:\Users\Name\AppData\Local\Programs\Python\Python39\lib\site-packages\discord\ext\commands\core.py", line 1433, in decorator
return cls(func, name=name, **attrs)
File "C:\Users\Name\AppData\Local\Programs\Python\Python39\lib\site-packages\discord\ext\commands\core.py", line 244, in __init__
self.description = inspect.cleandoc(kwargs.get('description', ''))
File "C:\Users\Name\AppData\Local\Programs\Python\Python39\lib\inspect.py", line 632, in cleandoc
lines = doc.expandtabs().split('\n')
AttributeError: 'list' object has no attribute 'expandtabs'
would be nice if someone could help me
also, this is my first post (and I'm new here) so I don't know much about Stack Overflow
(PS: I have client.help_command = None in my code, thanks Kermit)

The description argument takes a string, not a list. So, it should look like this:
#client.command(aliases=["commands","cmds"], description="Get command list")
Also, make sure you have client.help_command = None somewhere in your code, so that the default help command provided by discord.py can be overridden.

The immediate issue is that the description kwarg of the command decorator is being given a list when it expects a string, which can be found out from the Command documentation.
However more importantly, as it appears you're trying to create your own help command, that is not the recommended way to do so since you forgo the advantages of the existing HelpCommand framework that handles argument parsing for you. If you need help with using it, check out this guide which goes through subclassing and adding it to your bot.
Sidenote: for future questions, please provide the full error message so it's easier for other users to debug.

Using google_rest API

I am trying to use the Google Drive API to download publicly available files however whenever I try to proceed I get an import error.
For reference, I have successfully set up the OAuth2 such that I have a client id as well as a client secret , and a redirect url however when I try setting it up I get an error saying the object has no attribute urllen
>>> from apiclient.discovery import build
>>> from oauth2client.client import OAuth2WebServerFlow
>>> flow = OAuth2WebServerFlow(client_id='not_showing_client_id', client_secret='not_showing_secret_id', scope='https://www.googleapis.com/auth/drive', redirect_uri='https://www.example.com/oauth2callback')
>>> auth_uri = flow.step1_get_authorize_url()
>>> code = '4/E4h7XYQXXbVNMfOqA5QzF-7gGMagHSWm__KIH6GSSU4#'
>>> credentials = flow.step2_exchange(code)
And then I get the error:
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/Library/Python/2.7/site-packages/oauth2client/util.py", line
137, in positional_wrapper
return wrapped(*args, **kwargs)
File "/Library/Python/2.7/site-packages/oauth2client/client.py", line
1980, in step2_exchange
body = urllib.parse.urlencode(post_data)
AttributeError: 'Module_six_moves_urllib_parse' object has no attribute
'urlencode'
Any help would be appreciated, also would someone mind enlightening me as to how I instantiate a drive_file because according to https://developers.google.com/drive/web/manage-downloads, I need to instantiate one and I am unsure of how to do so.
Edit: So I figured out why I was getting the error I got before. If anyone else is having the same problem then try running.
sudo pip install -I google-api-python-client==1.3.2
However I am still unclear about the drive instance so any help with that would be appreciated.
Edit 2: Okay so I figured out the answer to my whole question. The drive instance is just the metadata which results when we use the API to search for a file based on its id

So as I said in my edits try the sudo pip install and a file instance is just a dictionary of meta data.

Soap Server raised fault: 'java.lang.NullPointerException'. How to debug?

I'm trying to call a SOAP webservice from the Dutch land register (WSDL here). I first tried doing that using the pysimplesoap library. Although I do get relevant xml back, pysimplesoap gives a TypeError: Tag: IMKAD_Perceel invalid (type not found) (I created a SO question about that here). Since I suspect this to be a bug in pysimplesoap I'm now trying to use the suds library.
In pysimplesoap the following returned correct xml (but as I said pysimplesoap gave a TypeError):
from pysimplesoap.client import SoapClient
client = SoapClient(wsdl='http://www1.kadaster.nl/1/schemas/kik-inzage/20141101/verzoekTotInformatie-2.1.wsdl', username=xxx, password=xxx, trace=True)
response = client.VerzoekTotInformatie(
Aanvraag={
'berichtversie': '4.7', # Refers to the schema version: http://www.kadaster.nl/web/show?id=150593&op=/1/schemas/homepage.html
'klantReferentie': 'MyReference1', # Refers to something we can set ourselves.
'productAanduiding': '1185', # a four-digit code referring to whether the response should be in "XML" (1185), "PDF" (1191) or "XML and PDF" (1057).
'Ingang': {
'Object': {
'IMKAD_KadastraleAanduiding': {
'gemeente': 'ARNHEM',
'sectie': 'AC',
'perceelnummer': '1234'
}
}
}
}
)
This produced the xml below:
<soap:Body>
<VerzoekTotInformatieRequest xmlns="http://www.kadaster.nl/schemas/kik-inzage/20141101">
<Aanvraag xmlns="http://www.kadaster.nl/schemas/kik-inzage/ip-aanvraag/v20141101">
<berichtversie xmlns="http://www.kadaster.nl/schemas/kik-inzage/ip-aanvraag/v20141101">4.7</berichtversie>
<klantReferentie xmlns="http://www.kadaster.nl/schemas/kik-inzage/ip-aanvraag/v20141101">ARNHEM-AC-1234</klantReferentie>
<productAanduiding xmlns="http://www.kadaster.nl/schemas/kik-inzage/ip-aanvraag/v20141101">1185</productAanduiding>
<Ingang xmlns="http://www.kadaster.nl/schemas/kik-inzage/ip-aanvraag/v20141101">
<Object xmlns="http://www.kadaster.nl/schemas/kik-inzage/ip-aanvraag/v20141101">
<IMKAD_KadastraleAanduiding xmlns="http://www.kadaster.nl/schemas/kik-inzage/ip-aanvraag/v20141101">
<gemeente xmlns="http://www.kadaster.nl/schemas/kik-inzage/ip-aanvraag/v20141101">ARNHEM AC</gemeente>
<sectie xmlns="http://www.kadaster.nl/schemas/kik-inzage/ip-aanvraag/v20141101">AC</sectie>
<perceelnummer xmlns="http://www.kadaster.nl/schemas/kik-inzage/ip-aanvraag/v20141101">5569</perceelnummer>
</IMKAD_KadastraleAanduiding>
</Object>
</Ingang>
</Aanvraag>
</VerzoekTotInformatieRequest>
</soap:Body>
So now I tried changing this code to use suds instead. So far I came up with this:
from suds.client import Client
client = Client(url='http://www1.kadaster.nl/1/schemas/kik-inzage/20141101/verzoekTotInformatie-2.1.wsdl', username='xxx', password='xxx')
Aanvraag = client.factory.create('ns3:Aanvraag')
Aanvraag.berichtversie = '4.7'
Aanvraag.klantReferentie = 'MyReference1'
Aanvraag.productAanduiding = '1185'
IMKAD_KadastraleAanduiding = client.factory.create('ns3:IMKAD_KadastraleAanduiding')
IMKAD_KadastraleAanduiding.gemeente = 'ARNHEM'
IMKAD_KadastraleAanduiding.sectie = 'AC'
IMKAD_KadastraleAanduiding.perceelnummer = '1234'
Object = client.factory.create('ns3:Object')
Object.IMKAD_KadastraleAanduiding = IMKAD_KadastraleAanduiding
Ingang = client.factory.create('ns3:Ingang')
Ingang.Object = Object
Aanvraag.Ingang = Ingang
result = client.service.VerzoekTotInformatie(Aanvraag)
which produces the following xml:
<ns2:Body>
<ns0:VerzoekTotInformatieRequest>
<ns0:Aanvraag>
<ns1:berichtversie>4.7</ns1:berichtversie>
<ns1:klantReferentie>MyReference1</ns1:klantReferentie>
<ns1:productAanduiding>1185</ns1:productAanduiding>
<ns1:Ingang>
<ns1:Object>
<ns1:IMKAD_KadastraleAanduiding>
<ns1:gemeente>ARNHEM</ns1:gemeente>
<ns1:sectie>AC</ns1:sectie>
<ns1:perceelnummer>1234</ns1:perceelnummer>
</ns1:IMKAD_KadastraleAanduiding>
</ns1:Object>
</ns1:Ingang>
</ns0:Aanvraag>
</ns0:VerzoekTotInformatieRequest>
</ns2:Body>
Unfortunately, this results in the server giving back a Nullpointer:
Traceback (most recent call last):
File "<input>", line 1, in <module>
result = client.service.VerzoekTotInformatie(Aanvraag)
File "/Library/Python/2.7/site-packages/suds/client.py", line 542, in __call__
return client.invoke(args, kwargs)
File "/Library/Python/2.7/site-packages/suds/client.py", line 602, in invoke
result = self.send(soapenv)
File "/Library/Python/2.7/site-packages/suds/client.py", line 649, in send
result = self.failed(binding, e)
File "/Library/Python/2.7/site-packages/suds/client.py", line 702, in failed
r, p = binding.get_fault(reply)
File "/Library/Python/2.7/site-packages/suds/bindings/binding.py", line 265, in get_fault
raise WebFault(p, faultroot)
WebFault: Server raised fault: 'java.lang.NullPointerException'
This error is of course terribly unhelpful. The error gives no hint whatsoever on what causes the NullPointer.
If I look at the differences between the xml which pysimplesoap and suds send over the wire, the xml by suds is missing a lot of xmlns definitions (although I don't know whether they are needed) and the names of the tags include prefixes with for example ns0:. I don't know if these differences are relevant, and I also don't know how I would make suds create the same xml as pysimplesoap.
Although the wsdl file of the service is public, the service itself is paid (€60 yearly + €3 for every successful request). So I guess it is hard/impossible for people reading this to reproduce the issue, and I can't really give out my user credentials here.
But since I'm really stuck on this issue, maybe someone can give me some tips on how to debug this? For example; how can I make suds create the same xml as pysimplesoap? Or how I can get more information on the nullpointer?
Any help is welcome!

This is not so much an answer, but an advice from prior experience with Python and SOAP.
Find some good (established, reference for SOAP) Java tool for making SOAP queries given WSDL.
Make some typical queries, interesting to you, and record what is being sent / received as templates
Forget Python SOAP libraries and just use template to query SOAP endpoint (there are many templating languages for Python).
If the step 2. fails with the prominent Java tool, contact techsupport of the service you are paying for.
Have you checked whether all those nice XSDs are really downloaded by Python SOAP clients?

Solr indexing issue with solrpy

Just started learning solr. I am trying to use solrpy as a client. My python code is:
import solr
# create a connection to a solr server
s = solr.SolrConnection('http://localhost:8983/solr')
# add a document to the index
doc = dict(
id='testid123',
title='Lucene in Action',
author=['Erik Hatcher', 'Otis Gospodneti'],
)
s.add(doc, commit=True)
# do a search
response = s.query('title:lucene')
for hit in response.results:
print hit['title']
This is from the example given here
My solr schema.xml is the default schema that comes with solr distribution. I have not made any changes to that. It has a uniqueKey field as "id".
<uniqueKey>id</uniqueKey>
And it is of string type
<field name="id" type="string" indexed="true" stored="true" required="true" multiValued="false" />
Still when I run my code, on my client side I get error:
Traceback (most recent call last):
File "/Users/user1/Documents/workspace/PyDelight/src/Test.py", line 12, in <module>
s.add(doc, commit=True)
File "/Library/Python/2.7/site-packages/solrpy-0.9.5-py2.7.egg/solr/core.py", line 678, in add
return Solr.add_many(self, [fields], commit=_commit)
File "/Library/Python/2.7/site-packages/solrpy-0.9.5-py2.7.egg/solr/core.py", line 326, in wrapper
return self._update(content, query)
File "/Library/Python/2.7/site-packages/solrpy-0.9.5-py2.7.egg/solr/core.py", line 550, in _update
rsp = self._post(selector, request, self.xmlheaders)
File "/Library/Python/2.7/site-packages/solrpy-0.9.5-py2.7.egg/solr/core.py", line 639, in _post
return check_response_status(self.conn.getresponse())
File "/Library/Python/2.7/site-packages/solrpy-0.9.5-py2.7.egg/solr/core.py", line 1097, in check_response_status
raise ex
solr.core.SolrException: HTTP code=400, reason=Bad Request
And on the solr trace side I get error:
843169 [qtp1151734776-20] INFO org.apache.solr.update.processor.LogUpdateProcessor ? [collection1] webapp=/solr path=/update params={commit=true} {} 0 0
843170 [qtp1151734776-20] ERROR org.apache.solr.core.SolrCore ? org.apache.solr.common.SolrException: Document is missing mandatory uniqueKey field: id
schema.xml file is in solr-4.4.0/example/solr/collection1/conf
And I am running solr by simply running start.jar in example directory.
Any idea where I am going wrong?

i have not used solrpy much (and haven't installed it yet) but from the initial example, it looks like it wants to be called with attribute=value pairs instead of a dictionary. (i know the example you posted is right from the online 0.9.2 documentation! but the current source on github has this in the comments):
add(**params)
Add a document. Pass in all document fields as
keyword parameters:
add(id='foo', notes='bar')
You must "commit" for the addition to be saved.
So try this:
s.add(commit=True, **doc)
and it will probably work. You may need to pull out the commit and do it separately, i don't know.
i am not a solr expert, and just played around with it a little bit, but also i had better luck using sunburnt than solrpy. worth a shot, maybe.
edit: github pointer to that file is here: http://code.google.com/p/solrpy/source/browse/solr/core.py

I haven't used Solr so I could be totally wrong, but in the example you link to the id is an int. Try making yours an int as well, changing your id from 'testid123' to something else like 123 and see what happens.

Google app engine key value error

I am writing a google app engine app and I have this key value error upon requests coming in
from the backtrace I just access and cause the key error
self.request.headers
entire code snippet is here, I just forward the headers unmodified
response = fetch( "%s%s?%s" % (
self.getApiServer() ,
self.request.path.replace("/twitter/", ""),
self.request.query_string
),
self.request.body,
method,
self.request.headers,
)
and get method handling the request calling proxy()
# handle http get
def get(self, *args):
parameters = self.convertParameters(self.request.query_string)
# self.prepareHeader("GET", parameters)
self.request.query_string = "&".join("%s=%s" % (quote(key) , quote(value)) for key, value in parameters.items())
self.proxy(GET, *args)
def convertParameters(self, source):
parameters = {}
for pairs in source.split("&"):
item = pairs.split("=")
if len(item) == 2:
parameters[item[0]] = unquote(item[1])
return parameters
the error back trace:
'CONTENT_TYPE'
Traceback (most recent call last):
File "/base/python_runtime/python_lib/versions/1/google/appengine/ext/webapp/__init__.py", line 513, in __call__
handler.post(*groups)
File "/base/data/home/apps/waytosing/1.342850593213842824/com/blogspot/zizon/twitter/RestApiProxy.py", line 67, in post
self.proxy(POST, *args)
File "/base/data/home/apps/waytosing/1.342850593213842824/com/blogspot/zizon/twitter/RestApiProxy.py", line 47, in proxy
self.request.headers,
File "/base/python_runtime/python_lib/versions/1/google/appengine/api/urlfetch.py", line 240, in fetch
allow_truncated, follow_redirects)
File "/base/python_runtime/python_lib/versions/1/google/appengine/api/urlfetch.py", line 280, in make_fetch_call
for key, value in headers.iteritems():
File "/base/python_runtime/python_dist/lib/python2.5/UserDict.py", line 106, in iteritems
yield (k, self[k])
File "/base/python_runtime/python_lib/versions/1/webob/datastruct.py", line 40, in __getitem__
return self.environ[self._trans_name(item)]
KeyError: 'CONTENT_TYPE'
Any idea why it happens or is this a known bug?

This looks weird. The docs mention that response "Headers objects do not raise an error when you try to get or delete a key that isn't in the wrapped header list. Getting a nonexistent header just returns None". It's not clear from the request documentation if request.headers are also objects of this class, but even they were regular dictionaries, iteritems seems to be misbehaving. So this might be a bug.
It might be worth inspecting self.request.headers, before calling fetch, and see 1) its actual type, 2) its keys, and 3) if trying to get self.request.headers['CONTENT_TYPE'] raises an error then.
But, if you simply want to solve your problem and move forward, you can try to bypass it like:
if 'CONTENT_TYPE' not in self.request.headers:
self.request.headers['CONTENT_TYPE'] = None
(I'm suggesting setting it to None, because that's what a response Header object should return on non-existing keys)

Here's my observation about this problem:
When the content-type is application/x-www-form-urlencoded and POST data is empty (e.g. jquery.ajax GET, twitter's favorite and retweet API...), the content-type is dropped by Google appengine.
You can add:
self.request.headers.update({'content-type':'application/x-www-form-urlencoded'})
before urlfetch.

Edit: indeed, looking at the error more carefully, it doesn't seem to be related to convertParameters, as the OP points out in the comments. I'm retiring this answer.
I'm not entirely sure what you mean by "just forward the headers unmodified", but have you taken a look at self.request.query_string before and after you call convertParameters? More to the point, you're leaving out any (valid) GET parameters of the form "key=" (that is, keys with empty values).
Maybe your original query_string had a value like "CONTENT_TYPE=", and your convertParameters is stripping it out.

Known issue http://code.google.com/p/googleappengine/issues/detail?id=3427 and potential workarounds here http://code.google.com/p/googleappengine/issues/detail?id=2040