🔒 Leetcode?!

[pliant perch]

I somehow don't understand why 0P is not a palindrome because p == p, right? What did I forget to consider? 🤔

[carmine hatch]

@pliant perch

Python help channel opened

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[unique heart]

you have to remove the numbers too python says they are alphanumberical but they aren't

[mighty gulch]

you should only be removing whitespace and punctuation.

!d str.isalnum

[carmine hatch]

str.isalnum

str.isalnum()```
Return `True` if all characters in the string are alphanumeric and there is at least one character, `False` otherwise. A character `c` is alphanumeric if one of the following returns `True`: `c.isalpha()`, `c.isdecimal()`, `c.isdigit()`, or `c.isnumeric()`.

[pliant perch]

So I shall not remove [0, ...., 9] and [a, ..., z]? 🤔

[pliant perch]

Thank you so much! I learned a new built-in function in Python today 👍

[mighty gulch]

technically not builtin, just a method on a builtin type

you can call it stdlib

[pliant perch]

What is the difference between built-in and stdlib?

[mighty gulch]

builtins don't need to be imported and can be accessed without a .x form

!d builtins

[carmine hatch]

builtins

This module provides direct access to all ‘built-in’ identifiers of Python; for example, builtins.open is the full name for the built-in function open().

This module is not normally accessed explicitly by most applications, but can be useful in modules that provide objects with the same name as a built-in value, but in which the built-in of that name is also needed. For example, in a module that wants to implement an open() function that wraps the built-in open(), this module can be used directly:

[mighty gulch]

basically, every file has an implicit from builtins import * at the top.

[pliant perch]

And I can't see it because it's hidden and invisible to the programmer? 🤔

[mighty gulch]

Yes.

Fun fact: If you add a new attribute to the builtins module, any newly imported modules will also have that new attribute.

If for whatever reason you never need to shadow a builtin with a variable, you can always access it via the builtins module.

[pliant perch]

Does it mean that from builtins import * is the mother of all files?

[mighty gulch]

I don't think so.

[pliant perch]

And what about stdlib functions? Is there also a from ... import ...?

[mighty gulch]

stdlib just means it comes standard with python

you can import it without installing any extra packages

stdlib: standard library

[pliant perch]

So there is also a background mechanism I can't see, but use?

[mighty gulch]

in what way?

you mean the import?

[pliant perch]

Yes 👍

[mighty gulch]

basically.

It gets complicated, but that's the gist of it.

sorry for going on a tangent btw

[carmine hatch]

Python help channel closed

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