Two solutions for implementing global variables in Python

The following describes how to implement global variables in Python:
Let's take a look at the following test procedure:

Count = 0def Fuc (count): print count + = 1for I in range (0, 10): Fuc (count)

The running result is:

>>> 0000000000

Obviously, this is not the result we want.

The solution to this problem is to use global variables:

Global aa = 3def Fuc (): global a print a = a + 1if _ name _ = "_ main __": global a for I in range (10): Fuc () print 'hello' print

The running result is:

>>> 3456789101112hello13

NOTE: If global variables are needed, declare them. However, do not pass parameters in a function. For example, Fuc (a) cannot be used.

Solution 2 -- list:

The sample code is as follows:

A = [3] def Fuc (): print a [0] a [0] = a [0] + 1if _ name _ = "_ main _": global a for I in range (10): Fuc () print 'hello' print a [0]

The result is the same as above.

The list can also be relatively simple to implement this function