help(__import__)
__import__(...)
__import__(name, globals={}, locals={}, fromlist=[], level=-1) -> module
导入一个模块。
globals:决定上下文,不修改。
locals:当前未使用。
fromlist:有值表示``from name import ...‘‘,为空表示``import name‘‘。
当从一个包中导入模块时,注意__import__(‘A.B‘, ...)当fromlist为空时返回包A,
不为空时返回子模块B。
level:用于决定是否执行绝对导入。-1是绝对相对都会尝试,默认。0是绝对。正数
表示相对当前模块的父目录的层数。
Import a module. The globals are only used to determine the context;
they are not modified. The locals are currently unused. The fromlist
should be a list of names to emulate ``from name import ...‘‘, or an
empty list to emulate ``import name‘‘.
When importing a module from a package, note that __import__(‘A.B‘, ...)
returns package A when fromlist is empty, but its submodule B when
fromlist is not empty. Level is used to determine whether to perform
absolute or relative imports. -1 is the original strategy of attempting
both absolute and relative imports, 0 is absolute, a positive number
is the number of parent directories to search relative to the current module.
Python知识点: __import__,布布扣,bubuko.com
原文地址:http://www.cnblogs.com/Clisa/p/3845243.html