python在函数内调用exec()

Question

I try to execute string code using exec function which is being called at another function. However, it doesn't print anything. How do I execute string code in this case?

def test_code():
    print "test_code"

def run():
    try:
        a= '''def test2():
            print "test2"

            test_code()
            test2()'''

        exec(a)
    except Exception as e:
        print e

run()

Answer 1

You have a code indentation issue. try this:

def test_code():
    print "test_code"


def run():
    try:
        a= '''
def test2():
    print "test2"

test_code()
test2()
'''

        exec(a)
    except Exception as e:
        print e

run()
# test_code
# test2

Answer 2

All problem is indentation of quoted string Here is solution,

def test_code():
    print "test_code"

def run():
    try:
        a= '''
def test2():
    print "test2"
    test_code()
test2()'''

        exec(a)
    except Exception as e:
        print e
run()

Output

test2

test_code