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Python Programming On Win32 by Mark Hammond, Andy Robinson

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module os: Miscellaneous OS Interfaces

This module provides a more portable way to use operating system-dependent functionality than importing an OS-dependent built-in module such as posix or nt.

This module searches for an OS-dependent built-in module such as mac or posix and exports the same functions and data as found there. The design of all Python’s built-in OS dependent modules is such that as long as the same functionality is available, it uses the same interface; e.g., the function os.stat( path ) returns stat information about path in the same format (which happens to have originated with the POSIX interface).

Extensions peculiar to a particular OS are also available through the os module, but using them is, of course, a threat to portability.

After os is imported for the first time, there’s no performance penalty in using functions from os instead of directly from the OS-dependent built-in module, so there should be no reason not to use os.

error

Raised when a function returns a system-related error (e.g., not for illegal argument types). This is also known as the built-in exception OSError. The accompanying value is a pair containing the numeric error code from errno and the corresponding string, as would be printed by the C function perror(). See the errno module, which contains names for the error codes defined by the underlying operating system.

When exceptions are classes, this exception carries two attributes, errno and strerror. The first holds the value of the C ...

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