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问题:

Google App engine documentation states that it is possible to upload and use third party libraries provided they written in pure Python.

What are the steps I need to take to do this?

回答1:

What I did is created a file called fix_path.py in my root directory that looks like this:

import os import sys import jinja2    # path to lib direcotory sys.path.insert(0, os.path.join(os.path.dirname(__file__), 'lib'))

Then I created a lib directory, and drop the module in there.

For example, I use WTForms. My file structure looks like this.

lib
- wtforms
fix_path.py
somefile.py

when I am ready to call it from my somefile script

import fix_path # has to be first. import wtforms

here is this example in my github source. checkout fix_path.py for setup and views.py for usage.

回答2:

Well I tried the same with following steps.

created a directory(lib) with init file i.e lib/__init__.py in my project root.
created my module (mymodule.py), and defined a function i.e.
```
def myfunc():     return "mycustomfunction" 
```
imported mymodule in my main.py
```
from lib import mymodule 
```

I could use the returned value from myfunc() and could pass that as a template value to my jinja2 template

Similarly, if we follow what @rjz also pointed out in the first answer, if the 3rd Party library is just a module then we can keep that in libs with an init file and it can be imported with an import statement ( point 3) . If the 3rd party library is a package then we can keep it in the project root and import it again with an import statement as this one in the main.py:

from thirdpartypackage import *

文章来源: Uploading Python third party libraries

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