List of Python built in functions

Built-in functions in Python are a set of predefined functions that are available to use in any Python program without the need to import any additional modules or libraries.

These functions provide a wide range of functionality, including mathematical operations, string manipulation, data structure manipulation, and input/output operations.

List of Built-in functions in Python

abs	Absolute value of input number
all	to check all elements of iterable for True of False
any	to check any elements of iterable for True of False
ascii	Printable chars in the object
bin	Converting integer to Binary
bool	Return True or False based on input object
breakpoint	Stop execution for debugging
bytearray	mutable array of bytearray
bytes	Return bytes object
callable	Checking if object is Callable or not
chr	Unicode pint value to get Char
classmethod	a class method for the function
compile	code object from AST or source String
complex	Complex number with real & imaginary parts
copyright	Display coyright constant value
credits	Display credit constant value
delattr	Deleting attribute of an object
dict	Dictionary object
dir	list of attributes and methods
display	display objects in frontend
divmod	quotient and remainder of two input numbers
enumerate	Adding incremental counter to iterable object
eval	Dynamic evalution of python code
exec	Dynamic execution of code
filter	Filter out elements of an iterable
float	Converting string to float dtype
format	Formatting outputs
frozenset	Making elements of iterable object to immutable
get_ipython
getattr	Getting value of the attribute
globals	Dictionary of global symbol table
hasattr	Checking the attribute
hash	hash value of object
help	built-in help document system
hex	Hex string from input number
id	Identity of the object
input	Input box for user data entry
int	String or number to Integer
isinstance	Checking if object is instance of a class
issubclass	Checking if class is subclass or input class or not
iter	Creating iterator object
len	Number of elements present in an iterable or string
license	Display license constant value
list	mutable object with elements
locals	dictionary of symbol table
map	apply function to each element of iterables
max	Maximum value of the iterable or string or series
memoryview
min	Minimum value of the iterable or string or series
next	Next element of an iterator
object	Object as function
oct	Octal string from input number
open	Read a file
ord	Unicode point value of the input char
pow	x to the power of y
print	Returning the object to screen or file
property
range	Sequence of numbers
repr	Unambiguous string representation of an object
reversed	Returns a reversed iterator
round	Rounded value of a number
set	Unordered and unindexed list
setattr	Add / update value of attribute
slice	breaking list, tuple, string etc by using slice object
sorted	New sorted list from an iterable
staticmethod	static method for a given function
str	Converting object to string
sum	sum of elements of an iterater
super	to access methods of base class
tuple	immutable object with elements
type	Data type of the object
vars	the __dict__ attribute of the object
zip	iterator object by using different iterables

To display above list we can use dir() with builtins module
dir()

import builtins
for i in dir(builtins):
    print(i)
print("Total Builtin Functions : ",len(dir(builtins)))

Based on the version of Python we are using the number of Builtin functions will varry.

Total Builtin Functions :  158

Checking if a word is Built-in function or not

import builtins
if 'sum' in dir(builtins):
    print(' sum is a built-in function' )
else:
    print(' No it is not a built-in function')

Output

 sum is a built-in function

Can I use builtin functions as variable names ?

No, it's generally not recommended to use built-in functions as variable names in Python. While it's technically possible in some cases, doing so can lead to several drawbacks and potential issues:

Naming Conflicts and Overriding:

Python reserves certain names for built-in functions, classes, and modules. Assigning those names to your variables would make them inaccessible, as your variable would take precedence within its scope.

Even if a built-in function isn't directly used in the same scope, there's a risk of accidentally overriding its intended behavior later in your code, leading to unexpected results.

Examples

#int=225 # this line will override the built-in function int()
x=int(input('Enter a number : '))
print(x*2)

Reserved words as variables are not allowed (error ) but Built-in function we can use.

#True=50 # reserved words as variables are not allowed
x=sum([5,7]) # sum is a built-in function
sum=50 # Use of Built-in functions as variables allowed
#x=sum([6,7])
print(sum)

How to avoid using built-in functions or reserved words ?

Use descriptive names:

Choose names that reflect the variable's content or purpose.
Explain what the variable holds, making your code self-documenting.
Avoid ambiguous names like x, temp, or data.
Instead, use names like first_name, total_price, or average_score.

To minimize the risk of accidentally overriding built-in functions, consider using a consistent prefix for your variable names. This is a common practice that promotes code readability and maintainability.

Example:
Popular prefixes include my_, user_, or custom_. This improves code clarity and helps distinguish your variables from built-in functions.

Download the above full source code from Github or run the code in your Google colab platform.

https://github.com/plus2net/Python-basics/blob/main/online_class_reserved_words_v1.ipynb

Python built-in functions , listing all and checking #python #pythonbasic
15-Feb-2024

Reserved Keywords in Python User Defined Functions variables in Python

All String methods tuple Python- Tutorials

Subscribe to our YouTube Channel here

Built in functions in Python