Strings Flashcards
What is the syntax for creating a multi-line string?
Use triple quotes: '''Line 1 Line 2'''.
How to convert a string to uppercase?
s.upper() (e.g., 'hello'.upper() → 'HELLO').
How to remove whitespace from the start/end of a string?
s.strip() (e.g., ' text '.strip() → 'text').
How to split a string into a list using a delimiter?
s.split(delimiter) (e.g., 'a,b,c'.split(',') → ['a','b','c']).
What method joins a list of strings into one string?
delimiter.join(list) (e.g., ','.join(['a','b']) → 'a,b').
How to replace a substring in a string?
s.replace(old, new) (e.g., 'hello'.replace('e','a') → 'hallo').
How to check if a string starts with a specific substring?
s.startswith(substring) (returns True or False).
How to check if a string ends with a specific substring?
s.endswith(substring).
What does s.find(substring) do?
Returns the first index of substring or -1 if not found.
What is the difference between s.find() and s.index()?
s.index() raises an error if substring is missing; s.find() returns -1.
How to count occurrences of a substring?
s.count(substring) (e.g., 'hello'.count('l') → 2).
How to format a string with variables?
Use f-strings: f'{variable}' (e.g., f'Name: {name}').
What does s.isdigit() check?
Returns True if all characters are digits.
What does s.isalpha() check?
Returns True if all characters are alphabetic.
How to split a string at line breaks?
s.splitlines() (e.g., splits 'Line1\nLine2' into ['Line1','Line2']).
How to check if a string is lowercase?
s.islower() (returns True if all characters are lowercase).
What does s.partition(separator) return?
A tuple: (part_before, separator, part_after).
How to capitalize the first character of a string?
s.capitalize() (e.g., 'python'.capitalize() → 'Python').
How to reverse a string?
Slice with [::-1]: s[::-1] (e.g., 'hello' → 'olleh').
What does s.title() do?
Converts the first letter of each word to uppercase (e.g., 'hello world' → 'Hello World').
