output of python....Are (not 4 in nums) and (4 not in nums) same.....??

Question

nums = [1, 2, 3]
print(not 4 in nums)
print(4 not in nums)
print(not 3 in nums)
print(3 not in nums)

OUTPUT >>>
True
True
False
False
>>>

Answer 1

Let's see each statements
1. print(not 4 in nums)
# not(4 in nums)
# 4 in nums ? -> False as 4 is not contained in list
# not(False) -> True
# True

2. print(4 not in nums)
# 4 is not in nums. So that's True

3. print(not 3 in nums)
# not( 3 in nums)
# not(True)
# False

4. print(3 not in nums)
#Since 3 is in nums .
#False

So basically (not 4 in nums ) means first check if( 4 is in nums) then find the negation(not) of the result obtained.
-> 4 in nums i.e False and Not of False evaluates to True.
whereas 4 not in nums means return True if 4 is not in nums , else return False
-> 4 not in nums evaluates to True since 4 is not contained in nums.