what's the difference between "not" and "!=" ???

Question

if not 1 == 1:
print("hehe")
#is the same to make
if 1 != 1:
print("hehe")
#right?

Answer 1

The result will be same for builtins but if you create your own class and implement __eq__ and __ne__ differently, you can get different results

class A:
def __init__(self, a):
self.a = a

def __eq__(self, other):
return self.a == other.a

def __ne__(self, other):
return self is not other

a1 = A(5)
a2 = A(5)

print(not a1 == a2) #False
print(a1 != a2) #True