micropython/tests/basics/boundmeth1.py

# tests basics of bound methods

# uPy and CPython differ when printing a bound method, so just print the type
print(type(repr([].append)))


class A:
    def f(self):
        return 0

    def g(self, a):
        return a

    def h(self, a, b, c, d, e, f):
        return a + b + c + d + e + f


# bound method with no extra args
m = A().f
print(m())

# bound method with 1 extra arg
m = A().g
print(m(1))

# bound method with lots of extra args
m = A().h
print(m(1, 2, 3, 4, 5, 6))

# can't assign attributes to a bound method
try:
    A().f.x = 1
except AttributeError:
    print("AttributeError")

print("--------")

# bound method comparison with same object
a = A()
m1 = a.f
m2 = a.f
print(m1 == a.f)  # should result in True
print(m2 == a.f)  # should result in True
print(m1 == m2)  # should result in True
print(m1 != a.f)  # should result in False

# bound method comparison with different objects
a1 = A()
a2 = A()
m1 = a1.f
m2 = a2.f
print(m1 == a2.f)  # should result in False
print(m2 == a1.f)  # should result in False
print(m1 != a2.f)  # should result in True

# bound method comparison with non-bound-method objects
print(A().f == None)  # should result in False
print(A().f != None)  # should result in True
print(None == A().f)  # should result in False
print(None != A().f)  # should result in True

print("--------")

# bound method hashing
a = A()
m1 = a.f
m2 = a.f
print(hash(m1) == hash(a.f))  # should result in True
print(hash(m2) == hash(a.f))  # should result in True
print(hash(m1) == hash(m2))  # should result in True
print(hash(m1) != hash(a.g))  # should result in True

# bound method hashing with different objects
a2 = A()
m2 = a2.f
print(hash(m1) == hash(a2.f))  # should result in False