I want to get the names of the keyword arguments of the methods of a class. I think I understood how to get the names of the methods and how to get the variable names of a specific method, but I don't get how to combine these:

class A(object):
    def A1(self, test1=None):
        self.test1 = test1
    def A2(self, test2=None):
        self.test2 = test2
    def A3(self):
        pass
    def A4(self, test4=None, test5=None):
        self.test4 = test4
        self.test5 = test5

a = A()

# to get the names of the methods:

for methodname in a.__class__.__dict__.keys():
    print methodname

# to get the variable names of a specific method:

for varname in a.A1.__func__.__code__.co_varnames:
    print varname

# I want to have something like this:
for function in class:
    print function.name
    for varname in function:
        print varname

# desired output:
A1
self
test1
A2
self
test2
A3
self
A4
self
test4
test5