Python Built-in Functions 📚

Built-in Functions Reference

Python comes with over 60 built-in functions that are always available. These are the most commonly used ones.

python

int("42")    # 42
float("3.14")  # 3.14
str(100)    # "100"
bool(0)     # False
list("abc") # ['a', 'b', 'c']

python

abs(-5)    # 5
max([1, 5, 3])  # 5
min([1, 5, 3])  # 1
sum([1, 2, 3])  # 6
round(3.14159, 2)  # 3.14

python

len([1, 2, 3])  # 3
sorted([3, 1, 2])  # [1, 2, 3]
reversed([1, 2, 3])
enumerate(["a", "b"])
zip([1, 2], ["a", "b"])

Function	Description
abs()	Returns the absolute value of a number
all()	Returns True if all items in an iterable object are true
any()	Returns True if any item in an iterable object is true
bin()	Returns the binary version of a number
bool()	Returns the boolean value of the specified object
dict()	Returns a dictionary
enumerate()	Takes a collection and returns it as an enumerate object with index
filter()	Use a filter function to exclude items in an iterable object
float()	Returns a floating point number
int()	Returns an integer number
input()	Allowing user input
len()	Returns the length of an object
list()	Returns a list
map()	Execute a specified function for each item in an iterable
max()	Returns the largest item in an iterable
min()	Returns the smallest item in an iterable
print()	Prints to the standard output device
range()	Returns a sequence of numbers, starting from 0 and increments by 1 (by default)
round()	Rounds a number
sorted()	Returns a sorted list
str()	Returns a string object
sum()	Sums the items of an iterator
type()	Returns the type of an object
zip()	Returns an iterator of tuples from combining iterables

Python has over 60 built-in functions. You can see all of them by running dir(__builtins__) in your Python interpreter.