如果使用第三方名称，如何将第3方模块导入python？

Question

I want to use this class: google-mail-oauth2-tools but if i'll do something like import oauth2 the imported class would be python-oauth2 which is deprected and doesn't support oauth2 )even though the name is oauth2) How can I use google module ? do I need to install it first?

Answer 1

Looking at the docs you linked , it looks like the Google Mail oauth2 module is meant to be downloaded and used in-place.

You can, of course, install it… but you can't have two (top-level) modules installed with the same name, so you'd have to uninstall python-oauth2 first.

But if you just use it in-place, in Python 2.7, you can have an oauth2.py in one directory and one in the stdlib. Whichever one you import first will "win"; any subsequent attempts to import oauth2 will get the first one.

To force it to import the right one (in a way that will also work for older Python 2.x and for Python 3.x), you may want to use the imp module to give it the path explicitly.

For example, if you plan to put oauth2.py right alongside the script that imports it, instead of just import oauth2 , do:

script_path = os.path.abspath(os.path.dirname(__file__))
f, path, desc = imp.find_module('oauth2', [script_path])
oauth2 = imp.load_module('oauth2', f, path, desc)

… although in some situations, you can get away with cheating by assuming the current working directory is the script directory, and/or by permanently munging sys.path , etc., so you can simplify it in various different ways—ultimately, if it's safe, just this:

sys.path = ['.'] + sys.path
import oauth2

Still, I would consider doing one of the following for safety (and readability):

• Uninstall python-oauth2 .
• Rename the downloaded oauth2.py to something else, like google_oauth2.py , and then import google_oauth2 .
• Put the downloaded oauth2.py into a package, so you can, eg, import googletools.oauth2 .