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Safari | Python Developer's Handbook -> imp 





< BACKMake Note | BookmarkCONTINUE >
152015024128143245168232148039199167010047123209178152124239215162146126011049175157212025

imp

The imp module provides mechanisms to access the internal import statement implementation. You might want to use this module to overload the Python import semantics. Note that the ihooks module provides an easy-to-use interface for this task.

imp.find_module()

This function identifies the physical location of a given module name.

basic syntax: file, path, desc = imp.find_module(modulename)

imp.load_module()

This one loads and returns a module object based on the information provided.

basic syntax: obj = imp.load_module(modulename,file,path,desc)

						
>>> import imp
>>> def newimport(modulename):
     file, path, desc = imp.find_module(modulename)
     moduleobj = imp.load_module(modulename,file,path,desc)
     return moduleobj

 math = newimport(math)
 math.e
2.71828182846

					

imp.getsuffixes()

It lists the precedence order in which files are imported when using the import statement.

Typing the following commands in my environment accomplishes this:

						
>>> import imp
>>> imp.get_suffixes()
[('.pyd', 'rb', 3), ('.dll', 'rb', 3), ('.py', 'r', 1), ('.pyc', 'rb', 2)]

					

Note that if I have a module stored in a file called mymodule.pyc, and I enter the command import mymodule at the interpreter, the system initially searches for a file called mymodule.pyd, and then for one called mymodule.dll, one called mymodule.py, and finally it searches for a file called mymodule.pyc.

Tip

When importing packages, this concept is ignored because directories precede all entries in this list.




Last updated on 1/30/2002
Python Developer's Handbook, © 2002 Sams Publishing

< BACKMake Note | BookmarkCONTINUE >

Index terms contained in this section

imp module 2nd
importing
      packages
libraries
      Python Services
modules
      imp 2nd
packages
      importing
Python Services
syntax
     functions
            imp.find.module()
            imp.load.module()

2002, O'Reilly & Associates, Inc.

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