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Post message via slack api with file attachment

I am trying to use Python SDK to post a file to Slack.
However, I am also trying to mention some people with # in the uploaded message.
I am trying this code:
import os
import slack
client = slack.WebClient(token='xoxp-asksjdfj')
res = client.files_upload(channels='#uploads', file='a.txt', title='#john')
However, the title doesn't show up as a mention. Is there a way to do that ?
Thanks

Instead of putting your mention in title, you want to put it initial_comment.
res = client.files_upload(channels='#uploads', file='a.txt', initial_comment='#john')

Blob.generate_signed_url() failing to AttributeError

So I'm trying to produce temporary globally readable URLs for my Google Cloud Storage objects using the google-cloud-storage Python library (https://googlecloudplatform.github.io/google-cloud-python/latest/storage/blobs.html) - more specifically the Blob.generate_signed_url() method. I doing this from within a Compute Engine instance in a command line Python script. And I keep getting the following error:
AttributeError: you need a private key to sign credentials.the credentials you are currently using <class 'oauth2cl
ient.service_account.ServiceAccountCredentials'> just contains a token. see https://google-cloud-python.readthedocs
.io/en/latest/core/auth.html?highlight=authentication#setting-up-a-service-account for more details.
I am aware that there are issues with doing this from within GCE (https://github.com/GoogleCloudPlatform/google-auth-library-python/issues/50) but I have created a new Service Account credentials following the instructions here: https://cloud.google.com/storage/docs/access-control/create-signed-urls-program and my key.json file most certainly includes a private key. Still I am seeing that error.
This is my code:
keyfile = "/path/to/my/key.json"
credentials = ServiceAccountCredentials.from_json_keyfile_name(keyfile)
expiration = timedelta(3) # valid for 3 days
url = blob.generate_signed_url(expiration, method="GET",
credentials=credentials)
I've read through the issue tracker here https://github.com/GoogleCloudPlatform/google-cloud-python/issues?page=2&q=is%3Aissue+is%3Aopen and nothing related jumps out so I am assuming this should work. Cannot see what's going wrong here.

I was having the same issue. Ended up fixing it by starting the storage client directly from the service account json.
storage_client = storage.Client.from_service_account_json('path_to_service_account_key.json')
I know I'm late to the party but hopefully this helps!

Currently, it's not possible to use blob.generate_signed_url without explicitly referencing credentials. (Source: Google-Cloud-Python documentation) However, you can do a workaround, as seen here, which consists of:
signing_credentials = compute_engine.IDTokenCredentials(
auth_request,
"",
service_account_email=credentials.service_account_email
)
signed_url = signed_blob_path.generate_signed_url(
expires_at_ms,
credentials=signing_credentials,
version="v4"
)

A much complete snippet for those asking where other elements come from. cc #AlbertoVitoriano
from google.auth.transport import requests
from google.auth import default, compute_engine
credentials, _ = default()
# then within your abstraction
auth_request = requests.Request()
credentials.refresh(auth_request)
signing_credentials = compute_engine.IDTokenCredentials(
auth_request,
"",
service_account_email=credentials.service_account_email
)
signed_url = signed_blob_path.generate_signed_url(
expires_at_ms,
credentials=signing_credentials,
version="v4"
)

Accesing ASANA data using python requests

First of all, I'm not a Python guru as you can probably tell... So here we go.
I'm trying to use Asana's API to pull data with Python requests (Projects, tasks, etc) and doing the authentication using Oauth 2.0... I've been trying to find a simple python script to have something to begin with but I haven't had any luck and I can't find a decent and simple example!
I already created the app and got my client_secret and client_secret. But I don't really know where or how to start... Could anybody help me please?
import sys, os, requests
sys.path.append(os.path.dirname(os.path.dirname(__file__)))
import asana
import json
from six import print_
import requests_oauthlib
from requests_oauthlib import OAuth2Session
client_id=os.environ['ASANA_CLIENT_ID'],
client_secret=os.environ['ASANA_CLIENT_SECRET'],
# this special redirect URI will prompt the user to copy/paste the code.
# useful for command line scripts and other non-web apps
redirect_uri='urn:ietf:wg:oauth:2.0:oob'
if 'ASANA_CLIENT_ID' in os.environ:
#Creates a client with previously obtained Oauth credentials#
client = asana.Client.oauth(
#Asana Client ID and Secret, set as a Windows environments to avoid hardcoding variables into the script#
client_id=os.environ['ASANA_CLIENT_ID'],
client_secret=os.environ['ASANA_CLIENT_SECRET'],
# this special redirect URI will prompt the user to copy/paste the code.
# useful for command line scripts and other non-web apps
redirect_uri='urn:ietf:wg:oauth:2.0:oob'
)
print ("authorized=", client.session.authorized)
# get an authorization URL:
(url, state) = client.session.authorization_url()
try:
# in a web app you'd redirect the user to this URL when they take action to
# login with Asana or connect their account to Asana
import webbrowser
webbrowser.open(url)
except Exception as e:
print_("Open the following URL in a browser to authorize:")
print_(url)
print_("Copy and paste the returned code from the browser and press enter:")
code = sys.stdin.readline().strip()
# exchange the code for a bearer token
token = client.session.fetch_token(code=code)
#print_("token=", json.dumps(token))
print_("authorized=", client.session.authorized)
me = client.users.me()
print "Hello " + me['name'] + "\n"
params = {'client_id' : client_id, 'redirect_uri' : redirect_uri, 'response_type' : token,}
print_("*************** Request begings *******************"+"\n")
print_("r = requests.get('https://app.asana.com/api/1.0/users/me)" + "\n")
r = requests.get('https://app.asana.com/api/1.0/users/me', params)
print_(r)
print_(r.json)
print_(r.encoding)
workspace_id = me['workspaces'][0]['id']
print_("My workspace ID is" + "\n")
print_(workspace_id)
print_(client.options)
I'm not sure how to use the requests lib with Asana. Their python doc did not help me. I'm trying to pull the available projects and their code colours so I can later plot them into a web browser (For a high-level view of the different projects and their respective colours - Green, yellow or red)
When I introduce the url (https://app.asana.com/api/1.0/users/me) into a browser, it gives me back a json response with the data, but when I try to do the same with the script, it gives me back a 401 (not authorized) response.
Does anybody know what I'm missing / doing wrong?
Thank you!!!

I believe the issue is that the Requests library is a lower level library. You would need to pass all of the parameters to your requests.
Is there a reason you are not exclusively using the Asana Python client library to make requests? All of the data you are looking to fetch from Asana (projects, tasks, etc.) are accessible using the Asana Python library. You will want to look in the library to find the methods you need. For example, the methods for the tasks resource can be found here. I think this approach will be easier (and less error-prone) than switching between the Asana lib and the Requests lib. The Asana lib is actually built on top of Requests (as seen here).

How to access Apples iCal-Server via Python

I'm trying to access Apples iCal-Server on a Mac OS X Snow Leopard Server via Python. The server is up and running and working with it via the iCal-Application is just fine.
Now I need to access this server via Python to use it as backend for resource planning. I have already looked at the CalDav-Module (http://packages.python.org/caldav/index.html) but the sample provided there didn't find any calendar, although the Principal-URL is correct.
So how can I read the events within a time range from a user's calendar using python?

[Not a solution but to debug]
From the example given in the caldav module documentation:
from datetime import datetime
import caldav
from caldav.elements import dav, cdav
# Principal url
url = "https://user:pass#hostname/user/Calendar"
client = caldav.DAVClient(url)
principal = caldav.Principal(client, url)
calendars = principal.calendars()
Issues
The url example is not the principal url for ical server
if you look at the code for calendars = principal.calendars(), it ignores the response.
If your principal url is incorrect then without issuing any errors it will return just an empty set of calendars.
Debugging help:
in file objects.py, there is a method for DAVObject called children. You can modify the code to include some debugging information. If you can paste the following and also paste your information in the question.
response = self.client.propfind(self.url.path, body, depth)
print response, self.url.path #provide additional info
print response.raw #provide additional info
for r in response.tree.findall(dav.Response.tag):

Programmatically getting an access token for using the Facebook Graph API

I am trying to put together a bash or python script to play with the facebook graph API. Using the API looks simple, but I'm having trouble setting up curl in my bash script to call authorize and access_token. Does anyone have a working example?

Update 2018-08-23
Since this still gets some views and upvotes I just want to mention that by now there seems to exist a maintained 3rd party SDK: https://github.com/mobolic/facebook-sdk
Better late than never, maybe others searching for that will find it. I got it working with Python 2.6 on a MacBook.
This requires you to have
the Python facebook module installed: https://github.com/pythonforfacebook/facebook-sdk,
an actual Facebook app set up
and the profile you want to post to must have granted proper permissions to allow all the different stuff like reading and writing.
You can read about the authentication stuff in the Facebook developer documentation. See https://developers.facebook.com/docs/authentication/ for details.
This blog post might also help with this: http://blog.theunical.com/facebook-integration/5-steps-to-publish-on-a-facebook-wall-using-php/
Here goes:
#!/usr/bin/python
# coding: utf-8
import facebook
import urllib
import urlparse
import subprocess
import warnings
# Hide deprecation warnings. The facebook module isn't that up-to-date (facebook.GraphAPIError).
warnings.filterwarnings('ignore', category=DeprecationWarning)
# Parameters of your app and the id of the profile you want to mess with.
FACEBOOK_APP_ID = 'XXXXXXXXXXXXXXX'
FACEBOOK_APP_SECRET = 'XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX'
FACEBOOK_PROFILE_ID = 'XXXXXX'
# Trying to get an access token. Very awkward.
oauth_args = dict(client_id = FACEBOOK_APP_ID,
client_secret = FACEBOOK_APP_SECRET,
grant_type = 'client_credentials')
oauth_curl_cmd = ['curl',
'https://graph.facebook.com/oauth/access_token?' + urllib.urlencode(oauth_args)]
oauth_response = subprocess.Popen(oauth_curl_cmd,
stdout = subprocess.PIPE,
stderr = subprocess.PIPE).communicate()[0]
try:
oauth_access_token = urlparse.parse_qs(str(oauth_response))['access_token'][0]
except KeyError:
print('Unable to grab an access token!')
exit()
facebook_graph = facebook.GraphAPI(oauth_access_token)
# Try to post something on the wall.
try:
fb_response = facebook_graph.put_wall_post('Hello from Python', \
profile_id = FACEBOOK_PROFILE_ID)
print fb_response
except facebook.GraphAPIError as e:
print 'Something went wrong:', e.type, e.message
Error checking on getting the token might be better but you get the idea of what to do.

Here you go, as simple as it can get. Doesn’t require any 3rd-party SDK etc.
Make sure Python 'requests' module is installed
import requests
def get_fb_token(app_id, app_secret):
url = 'https://graph.facebook.com/oauth/access_token'
payload = {
'grant_type': 'client_credentials',
'client_id': app_id,
'client_secret': app_secret
}
response = requests.post(url, params=payload)
return response.json()['access_token']

Easy! Just use facebook-sdk.
import facebook
app_id = 'YOUR_APP_ID'
app_secret = 'YOUR_APP_SECRET'
graph = facebook.GraphAPI()
# exactly what you're after ;-)
access_token = graph.get_app_access_token(app_id, app_secret)

You first need to set up an application. The following will then spit out an access token given your application ID and secret:
> curl -F type=client_cred -F client_id=[...] -F client_secret=[...] https://graph.facebook.com/oauth/access_token

Since a web browser needs to be involved for the actual authorization, there is no such thing as a "standalone script" that does it all. If you're just playing with the API, or are writing a script to automate something yourself, and want a access_token for yourself that does not expire, you can grab one here: http://fbrell.com/auth/offline-access-token

There IS a way to do it, I've found it, but it's a lot of work and will require you to spoof a browser 100% (and you'll likely be breaking their terms of service)
Sorry I can't provide all the details, but the gist of it:
assuming you have a username/password for a facebook account, go curl for the oauth/authenticate... page. Extract any cookies returned in the "Set-Cookie" header and then follow any "Location" headers (compiling cookies along the way).
scrape the login form, preserving all fields, and submit it (setting the referer and content-type headers, and inserting your email/pass) same cookie collection from (1) required
same as (2) but now you're going to need to POST the approval form acquired after (2) was submitted, set the Referer header with thr URL where the form was acquired.
follow the redirects until it sends you back to your site, and get the "code" parameter out of that URL
Exchange the code for an access_token at the oauth endpoint
The main gotchas are cookie management and redirects. Basically, you MUST mimic a browser 100%. I think it's hackery but there is a way, it's just really hard!

s29 has the correct answer but leaves some steps to solve. The following script demonstrates a working script for acquiring an access token using the Facebook SDK:
__requires__ = ['facebook-sdk']
import os
import facebook
def get_app_access_token():
client = facebook.GraphAPI()
return client.get_app_access_token(
os.environ['FACEBOOK_APP_ID'],
os.environ['FACEBOOK_APP_SECRET'],
)
__name__ == '__main__' and print(get_app_access_token())
This script expects the FACEBOOK_APP_ID and FACEBOOK_APP_SECRET environment variables are set to the values for your app. Feel free to adapt that technique to load those values from a different source.
You must first install the Facebook SDK (pip install facebook-sdk; python get-token.py) or use another tool like rwt to invoke the script (rwt -- get-token.py).

Here is the Python Code. Try running some of these examples on command line, they work fine for me. See also — http://www.pythonforfacebook.com/