python-变量的作用域

m in built-in namespace
def foo():
    m=3
    def bar():
        print "bar func is",m
    bar()
    print "foo func is",m
foo()
#bar func is 3
#foo func is 3
"""
"""
m in the local namespace
def foo():
    m=3
    def bar():
        m=5
        print "bar func is",m
    bar()
    print "foo func is",m
foo()
#bar func is 5
#foo func is 3
"""


"""
#m in the global namespace
m=8
def foo():
    m=3
    def bar():
        m=5
        print "bar func is",m
    bar()
    print "foo func is",m
foo()
#bar func is 5
#foo func is 3
"""