Demonstrates global variables : Global « Language Basics « Python

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Python » Language Basics » GlobalScreenshots 
Demonstrates global variables
Demonstrates global variables



def read_global():
    print "From inside the local namespace of read_global(), value is:", value

def shadow_global():
    value = -10
    print "From inside the local namespace of shadow_global(), value is:", value
  
def change_global():
    global value
    value = -10
    print "From inside the local namespace of change_global(), value is:", value

# main
# value is a global variable because we're in the global namespace here
value = 10
print "In the global namespace, value has been set to:", value, "\n"

read_global()
print "Back in the global namespace, value is still:", value, "\n"

shadow_global()
print "Back in the global namespace, value is still:", value, "\n"

change_global()
print "Back in the global namespace, value has now changed to:", value

           
       
Related examples in the same category
1. Introducing globals()Introducing globals()
2. Global variables
3. Use global key word to reference outside global variablesUse global key word to reference outside global variables
4. Local and global Scoping example.Local and global Scoping example.
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