str.isalpha() Return true if all characters in the string are alphabetic and there is at least one character, false otherwise

bytes.lstrip([chars]) bytearray.lstrip([chars]) Return a copy of the sequence with specified leading bytes removed

bytearray.decode(encoding="utf-8", errors="strict") Return a string decoded from the given bytes. Default encoding is 'utf-8'

float.is_integer() Return True if the float instance is finite with integral value, and False otherwise:

bytearray.isalpha() Return true if all bytes in the sequence are alphabetic ASCII characters and the sequence is not empty,

class memoryview(obj) Create a memoryview that references obj. obj must support the buffer protocol

sort(*, key=None, reverse=None) This method sorts the list in place, using only < comparisons between items

contextmanager.__enter__() Enter the runtime context and return either this object or another object related to the runtime

bytearray.lstrip([chars]) Return a copy of the sequence with specified leading bytes removed. The chars argument is

difference(other, ...) set - other - ... Return a new set with elements in the set that are not in the others.