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1linePython

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1linePython

A collection of one-liner Python answers on some online code challenges.

The idea of this repository came when I challenged shinez1997 to resolve code problems on binarysearch.com with only one line of Python code. He is better than me in every aspect of coding, and this is only way I can beat him somehow.

Rules

The answer is on the same line with the return.
No module is imported except defaults by code challenge platforms.
Must not reach the TLE of the code challenge platform.
Hacks, tricks, or whatever that fits in one line and pass the tests is accepted.

Example:

# functools is imported by default
class Solution: # default by online judge
    def minAddToMakeValid(self, s: str) -> int:  # default by online judge
        # answer fit in one line
        return len(functools.reduce(lambda c1, c2: c2 if not c1 else c1[:-1] if c2==")" and c1[-1] == "(" else c1 + c2, s)) if s else len(s)

Real life usage

Just don't.
When you hate your future self.
When you hate your company, you are willing to leave, you want your product run but be unmaintainable.
When the challenge is too simple to you, you want to make life complicate.

Notes

Many of the answers are not really 1-liner Python code, as they use functions from libraries.
Many of the answers are not the best optimized answers. They just fit under the requirement of the problem's Execute Time Limit.
Code challenge websites usually import some default Python libraries, but the list may vary between sites.