54 lines
971 B
Python
54 lines
971 B
Python
# Test that returning of NotImplemented from binary op methods leads to
|
|
# TypeError.
|
|
try:
|
|
NotImplemented
|
|
except NameError:
|
|
print("SKIP")
|
|
raise SystemExit
|
|
|
|
class C:
|
|
def __init__(self, value):
|
|
self.value = value
|
|
|
|
def __str__(self):
|
|
return "C({})".format(self.value)
|
|
|
|
def __add__(self, rhs):
|
|
print(self, '+', rhs)
|
|
return NotImplemented
|
|
|
|
def __sub__(self, rhs):
|
|
print(self, '-', rhs)
|
|
return NotImplemented
|
|
|
|
def __lt__(self, rhs):
|
|
print(self, '<', rhs)
|
|
return NotImplemented
|
|
|
|
def __neg__(self):
|
|
print('-', self)
|
|
return NotImplemented
|
|
|
|
c = C(0)
|
|
|
|
try:
|
|
c + 1
|
|
except TypeError:
|
|
print("TypeError")
|
|
|
|
try:
|
|
c - 2
|
|
except TypeError:
|
|
print("TypeError")
|
|
|
|
try:
|
|
c < 1
|
|
except TypeError:
|
|
print("TypeError")
|
|
|
|
# NotImplemented isn't handled specially in unary methods
|
|
print(-c)
|
|
|
|
# Test that NotImplemented can be hashed
|
|
print(type(hash(NotImplemented)))
|