Python local variables and global variables DAY15

Global variables, variables that can be called globally

Local variables, variables that can be called in a subroutine

' W ' def text ():     ' L '     Print (name) text () print (name)

Global variables are called and can be re-assigned, and cannot be re-assigned if not

Text () determines the order of calls

' W ' def text ():     Global name     ' L '     Print (name) def text2 ():    print (name) Text2 () text () print (name)

Global variables are called and can be re-assigned, and cannot be re-assigned if not

' W ' def text ():     Global name     ' L '     Print (name) def text2 ():    print (name) text () Text2 () print (name)

No global cannot be re-assigned, but for mutable types, internal elements can be manipulated

name = ['1','2']def A ():    name.append ('  3')    print (name) a () print (name)

Global variables are uppercase, local variables are lowercase

Nonlocal refers to the upper level variable

' W ' def ABC ():     ' a '     def BCD ():        nonlocal name        'b'    BCD ()    Print (name) print (name) ABC () print (name )

Python local variables and global variables DAY15