Using remote source code

[Alex Martelli]

<pyapplico at gmail.com> wrote:

> Is there any possible way that I can place a .py file on the internet,
> and use that source code in an .py file on my computer?

You can write an import hook in any way you like; see
<http://www.python.org/dev/peps/pep-0302/> .

Here's a trivial example (bereft of much error checking, etc).  I've
uploaded to http://www.aleax.it/foo.py a toy module w/contents:

def foo(): return 'foo'

Here's a tiny program to import said module from my site:


import urllib2, sys, new

theurl = 'http://www.aleax.it/'

class Examp(object):
    names = set([ 'foo', ])
    def find_module(self, fullname, path=None):
        if fullname not in self.names: return None
        self.foo = urllib2.urlopen(theurl+fullname+'.py')
        return self
    def load_module(self, fullname):
        module = sys.modules.setdefault(fullname,
                                          new.module(fullname))
        module.__file__ = fullname
        module.__loader__ = self
        exec self.foo.read() in module.__dict__
        return module

def hooker(pathitem):
    print 'hooker %r' % pathitem
    if pathitem.startswith(theurl): return Examp()
    raise ImportError

sys.path_hooks.append(hooker)
sys.path.append(theurl)

import foo
print foo.foo()



Alex