如何导入与系统模块同名的用户模块？

Question

I have a legacy python program which defined a module whose name conflict with a system module in the current python, what's the easiest method to fix this? This module has been imported in many place, so it would be great if no need to change the the old python source.

Answer 1

You could create a custom import routine using the imp module . For example, here I'm importing a module named string which shadows the real string module:

import imp

def user_import(name, path):
    mod_file, mod_path, mod_desc = imp.find_module(name, [path])
    return imp.load_module(name, mod_file, mod_path, mod_desc)

# load the real 'string' module
import string
print string.digits

# load the user 'string' module which lives under the path './foo'
mod = user_import('string', './foo')
print mod.digits

Output:

0123456789
thesearenotdigits

Answer 2

You can always rename a module when you import it, such as:

import sys as realsys

realsys.exit(1)

It seems like you'll have to do this either for the system module whose name you have overloaded or for your module, depending on which causes the least pain.

Bottom line, when you create modules, it's good to more fully qualify the name, eg instead of creating sys (in this example), you could have created mylib.sys .