python怎么加载包_如何在Python Interpreter中重新导入更新的包？

Python3更新:(引自already-answered answer,自上次编辑/评论以来建议使用不推荐的方法)

In Python 3, reload was moved to the 07001 module. In 3.4, imp was deprecated in favor of 07002, and 07003 was added to the latter. When targeting 3 or later, either reference the appropriate module when calling reload or import it.

带走：

> Python3> = 3.4：importlib.reload(packagename)

> Python3< 3.4：imp.reload(packagename)

> Python2：继续下面

使用reload内置函数：

When reload(module) is executed:

Python modules’ code is recompiled and the module-level code reexecuted, defining a new set of objects which are bound to names in the module’s dictionary. The init function of extension modules is not called a second time.

As with all other objects in Python the old objects are only reclaimed after their reference counts drop to zero.

The names in the module namespace are updated to point to any new or changed objects.

Other references to the old objects (such as names external to the module) are not rebound to refer to the new objects and must be updated in each namespace where they occur if that is desired.

例：

# Make a simple function that prints "version 1"

shell1$echo 'def x(): print "version 1"' > mymodule.py

# Run the module

shell2$python

>>> import mymodule

>>> mymodule.x()

version 1

# Change mymodule to print "version 2" (without exiting the python REPL)

shell2$echo 'def x(): print "version 2"' > mymodule.py

# Back in that same python session

>>> reload(mymodule)

>>> mymodule.x()

version 2

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