第482页 | Learning Python | 阅读 ‧ 电子书库

1. Find It

First, Python must locate the module file referenced by an import statement. Notice that the import statement in the prior section’s example names the file without a .py suffix and without its directory path: it just says import b, instead of something like import c:\dir1\b.py. In fact, you can only list a simple name; path and suffix details are omitted on purpose and Python uses a standard module search path to locate the module file corresponding to an import statement.[47] Because this is the main part of the import operation that programmers must know about, we’ll return to this topic in a moment.