Call a Python method by name

Question

If I have an object and a method name in a string, how can I call the method?

class Foo:
    def bar1(self):
        print 1
    def bar2(self):
        print 2

def callMethod(o, name):
    ???

f = Foo()
callMethod(f, "bar1")

Answer 1

Easy one:

class Foo:
    def bar1(self):
        print 1
    def bar2(self):
        print 2

def callMethod(o, name):
    getattr(o, name)()


f = Foo()
callMethod(f, "bar1")

Take a look at getattr

You can also use setattr for setting Class attributes by names.

Answer 2

getattr(globals()['Foo'](), 'bar1')()
getattr(globals()['Foo'](), 'bar2')()

No need to instantiate Foo first!

Answer 3

def callmethod(cls, mtd_name):    
    method = getattr(cls, mtd_name)
    method()