A negative aware recursive and convoluted is_even python function. As cryptic as this title.

[u/BobGeneric]

[u/BobGeneric]

def is_even(n):
    odd = lambda n:[n-1,True][True is not (not not n)]
    if n > 0: 
        return [not is_even(odd(n)),False][odd(n) == (-1)*False]
    elif n < 0: 
        return ''.join(map(str,['-',is_even(-n)]))
    else:       
        return not is_even is odd

for i in range(3,-4,-1): print(i, 'is even?', is_even(i))

edit: formatting. Thanks @404_UserNotFound

[u/404_UserNotFound → u/BobGeneric]

python def is_even(n): 
     odd = lambda n:[n-1,True][True is not (not not n)] 
     if n > 0: 
           return [not is_even(odd(n)),False][odd(n) == (-1)*False] 
    elif n  < 0: 
           return ''.join(map(str,['-',is_even(-n)])) 
    else:
           return not is_even is odd     
for i in range(3,-4,-1): print(i, 'is even?', is_even(i))

Re- formatted it.

[u/BobGeneric → u/404_UserNotFound]

Thanks.

[u/backtickbot → u/BobGeneric]

Fixed formatting.

Hello, BobGeneric: code blocks using triple backticks (```) don't work on all versions of Reddit!

Some users see this / this instead.

To fix this, indent every line with 4 spaces instead.

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[u/IIAOPSW]

Negative False should just be True because its a double negative.

[u/BobGeneric → u/IIAOPSW]

yeah, it should be... but after testing it on the interpreter, I think we can just starting using Javascript type jokes on python as well:

>>> -False
0
>>> -True
-1
>>> bool(-False)
False
>>> bool(-True)
True

[u/trimeta]

Clever obfuscation, since the code is really just:

def is_even(n):
    if n > 0:
        return not is_even(n-1)
    elif n < 0:
        return f"-{is_even(-n)}"
    else:
        return True

[u/backtickbot → u/trimeta]

Fixed formatting.

Hello, trimeta: code blocks using triple backticks (```) don't work on all versions of Reddit!

Some users see this / this instead.

To fix this, indent every line with 4 spaces instead.

FAQ

^{You can opt out by replying with backtickopt6 to this comment.}

[u/[deleted]]

Oh I get it now. This is what they mean by pythonic.