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def func(x):
print 'x is', x
x = 2
print 'Changed local x to', x
x = 50
func(x)
print 'x is still', x
$ python func_local.py x is 50
Changed local x to 2 x is still 50
Next, we assign the value2 tox. The namex is local to our function. So, when we change the value of x in the function, thex defined in the main block remains unaffected.
In the lastprint statement, we confirm that the value ofx in the main block is actually unaffected.