Python detailed global variables

So Python global variables is a relative term

Examples:
test.py

a = 1

t1.py

SYS Import
Import test # Import test module

a = 1 # declare a variable

func1 DEF ():
    Global # A reference to the global variable current namespace
    a + = 1

func2 DEF ():
    test.a. 1 = # + reference variable test module namespace

func3 DEF ():
    # Print (the sys.modules) # records all modules of the current file into the
    module = sys.modules [ 'test'] # secondary reference test imported modules
    module.a + = 1 # referenced test module naming space variables

func1()
func2()
func3()

print (a) # Results: 2
Print (test.a) # Results: