Standard Library and Built-ins Flashcards

Which module is used to work with regular expressions in Python?

Answer: re

The `re` module provides regular expression matching operations.

What does `re.match()` do differently from `re.search()`?

Answer: match() only matches at the beginning of the string

`re.match()` only looks at the beginning of the string, while `re.search()` scans the entire string.

What does `sys.argv` contain?

Answer: Command-line arguments as a list

`sys.argv` is a list where `sys.argv[0]` is the script name and the rest are command-line arguments.

Which built-in function converts a string to an integer?

Answer: int()

`int()` converts a string or number to an integer, raising `ValueError` for invalid input.

What does `dir(obj)` return?

Answer: A list of valid attributes and methods of the object

`dir()` returns an alphabetically sorted list of names in the current scope or object's attributes.

Which module provides `namedtuple` for creating tuple subclasses with named fields?

Answer: collections

`collections.namedtuple` creates tuple subclasses with named fields for readable attribute access.