Path fixer for Google App Engine to load libraries from packages directory.

README.md

path_fixer.py should be placed at the root of your project, and imported at the top of any of your entry point scripts (main.py, manage.py, test.py, etc)

All your libraries should be copied from site-packages (ex. /Library/Python/2.7/site-packages or your virtualenv) and into a packages directory at the root of your project.

myapp
|-- packages
   |-- library1.py
   |-- library2.py
   |-- library3
      | -- __init__.py
      | -- library3.py
|-- app.yaml
|-- main.py
|-- path_fixer.py

app.yaml

application: myapp
version: 1

runtime: python27
api_version: 1
threadsafe: true

default_expiration: "7d"

handlers:
- url: /favicon.ico
  static_files: application/static/img/favicon.ico
  upload: application/static/images/favicon.ico

- url: /robots.txt
  static_files: application/static/robots.txt
  upload: application/static/robots.txt

- url: /static
  static_dir: application/static

- url: .*
  script: main.app

main.py

import path_fixer

import webapp2
import routes
import config

app = webapp2.WSGIApplication(config=config.webapp2_config)
routes.add_routes(app)

path_fixer.py

import os
import sys
package_dirs = ["packages"]

for package_dir in package_dirs:
    if os.path.exists(package_dir):
        package_dir_path = os.path.join(os.path.dirname(__file__), package_dir)
        sys.path.insert(0, package_dir_path)

        # Append zip archives to path for zipimport
        for filename in os.listdir(package_dir_path):
            if filename.endswith((".zip", ".egg")):
                sys.path.insert(0, "%s/%s" % (package_dir_path, filename))