Include python module (dependencies) installation in your python script

Question

Is there a way to include/invoke python module(s) (dependencies) installation first, before running the actual/main script?

For example, in my main.py:

Answer 1

You should use the imp module. Here's a example:

import imp
import httplib2
import sys

try:
  import MultipartPostHandler
except ImportError:
  # Here you download 
  http = httplib2.Http()
  response, content = http.request('http://where_your_file_is.com/here')
  if response.status == 200:
    # Don't forget the right managment
    with open('MultipartPostHandler.py', 'w') as f:
     f.write(content)
    file, pathname, description = imp.find_module('MultipartPostHandler')
    MultipartPostHandler = imp.load_module('MultipartPostHandler', file, pathname, description)
  else:
    sys.exit('Unable to download the file')

For a full approach, use a queue:

download_list = []
try:
    import FirstModule
except ImportError:
    download_list.append('FirstModule')

try:
    import SecondModule
except ImportError:
    download_list.append('SecondModule')

if download_list:
    # Here do the routine to dowload, install and load_modules

# THe main routine
def main():
    the_response_is(42)

You can download binaries with open(file_content, 'wb')

I hope it help

BR