How do I get a list of all the built-in functions in Python? - Stack Overflow
Python has 42 builtin functions whereas documentation list 68 - Stack Overflow
Is there a list of every Python function out there?
Built in functions in Python 3
Not sure where you got that code, but anyhow the math module documentation doesn't point to the module's source code, it is implemented in C in https://hg.python.org/cpython/file/tip/Modules/mathmodule.c.
To do what you want all you need is to raise to the power of 0.5:
>>> 4**0.5
2.0
As for the second question, you'd need to find the balance between your natural curiosity and the desire to dig and learn, and the constraints of time and productivity. It is important to expand your knowledge, but not as an excuse for procrastination.
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I recently learnt that stuff like .strip(), .title(), exists, which got me interested to learn about all these little bonus gimmicks about Python that I could use in my everyday tasks or to improve functionality in my code.
As of now I know that https://docs.python.org/3/library/functions.html exists but there isn't the functions mentioned above within that list. Is there another list of all these functions including those mentioned out there? Thank you