list of string check function in python?

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Mayank kumar Verma · Answer

Check if a variable is a string isinstance(value, str) Check if list contains only strings all(isinstance(x, str) for x in lst) Check if list contains any string any(isinstance(x, str) for x in lst) Simple function def is_list_of_strings(lst): return all(isinstance(x, str) for x in lst) This answer assist by AI

Anubhav Sharma · Answer

Predefined is* string check functions in Python (the methods of str class that return True/False). Here’s the full list: Common is* string methods in Python Method Returns True if… str.isalnum() All characters are alphanumeric (letters or digits). str.isalpha() All characters are alphabetic (letters only). str.isascii() All characters are ASCII (Python 3.7+). str.isdecimal() All characters are decimal digits (0–9 only). str.isdigit() All characters are digits (includes decimals, subscripts, superscripts). str.isidentifier() String is a valid Python identifier (e.g., variable name). str.islower() All cased characters are lowercase. str.isnumeric() All characters are numeric (includes digits, fractions, Roman numerals, etc.). str.isprintable() All characters are printable or the string is empty. str.isspace() All characters are whitespace. str.istitle() String is title-cased (first letter uppercase, rest lowercase). str.isupper() All cased characters are uppercase. Example usage

list of string check function in python?

2 Answers

Check if a variable is a string

Check if list contains only strings

Check if list contains any string

Simple function

Common `is*` string methods in Python

Example usage

Method	Returns `True` if…
`str.isalnum()`	All characters are alphanumeric (letters or digits).
`str.isalpha()`	All characters are alphabetic (letters only).
`str.isascii()`	All characters are ASCII (Python 3.7+).
`str.isdecimal()`	All characters are decimal digits (0–9 only).
`str.isdigit()`	All characters are digits (includes decimals, subscripts, superscripts).
`str.isidentifier()`	String is a valid Python identifier (e.g., variable name).
`str.islower()`	All cased characters are lowercase.
`str.isnumeric()`	All characters are numeric (includes digits, fractions, Roman numerals, etc.).
`str.isprintable()`	All characters are printable or the string is empty.
`str.isspace()`	All characters are whitespace.
`str.istitle()`	String is title-cased (first letter uppercase, rest lowercase).
`str.isupper()`	All cased characters are uppercase.

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list of string check function in python?

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2 Answers

Check if a variable is a string

Check if list contains only strings

Check if list contains any string

Simple function

Common is* string methods in Python

Example usage

Common `is*` string methods in Python