Python Built-in Functions Reference

Type Conversion:
- int(x) - Convert to integer
- str(x) - Convert to string
- float(x) - Convert to float
- list(x) - Convert to list
- tuple(x) - Convert to tuple
- set(x) - Convert to set
- dict(x) - Convert to dictionary
- bool(x) - Convert to boolean

Useful Functions:
- len(x) - Length of object
- max(x) - Maximum value
- min(x) - Minimum value
- sum(x) - Sum of values
- sorted(x) - Return sorted list
- reversed(x) - Return reversed iterator
- enumerate(x) - Get index and value

Iteration:
- range(start, stop, step) - Create sequence
- map(func, iterable) - Apply function
- filter(func, iterable) - Filter items
- zip(iterable1, iterable2) - Combine iterables
- list comprehension: [x for x in range(10)]

String Methods:
- upper() - Convert to uppercase
- lower() - Convert to lowercase
- strip() - Remove whitespace
- split() - Split string
- replace() - Replace substring
- join() - Join list to string

List Methods:
- append(x) - Add item
- extend(list) - Add multiple items
- insert(index, x) - Insert at position
- remove(x) - Remove item
- pop(index) - Remove and return item
- clear() - Remove all items
- count(x) - Count occurrences
- sort() - Sort in place