Here are the 10 essential python built-in functions to master in 2023
Python is a well-known programming language that is widely used in a variety of fields including web development, data analysis, artificial intelligence, and others. One of the reasons for its popularity is the large number of built-in functions it provides. These functions allow developers to perform common tasks without writing their own code. In this article, we will take a look at 10 essential Python built-in functions that every developer should be familiar with in 2023. From the filter function to the sorted function, these functions are sure to make your code more efficient and elegant.
Python built-in functions:
filter(): The filter function is used to filter elements from an iterable according to a condition. It accepts two parameters: a function and an iterable. The function must return a Boolean value, which will be used to filter the iterable. For example, you can use the following code to filter all even numbers from a list:
numbers = [1, 2, 3, 4, 5, 6]
even_numbers = list(filter(lambda x: x % 2 == 0, numbers))
print(even_numbers)
reduce(): The reduce function applies a function to all elements of an iterable and returns a single value. Because it is a component of the functools module, it must be imported before use. For example, you can use the following code to find the product of all elements in a list:
from functools import reduce
numbers = [1, 2, 3, 4, 5]
product = reduce(lambda x, y: x*y, numbers)
print(product)
any(): The any function determines whether any element in an iterable is true. If any element is true, it returns true; otherwise, it returns false. For example, you can use the following code to check if any element in a list is greater than 5:
numbers = [1, 2, 3, 4, 5, 6]
result = any(x > 5 for x in numbers)
print(result)
all(): The all function is used to determine whether or not all elements in an iterable are true. If all elements are true, it returns true; otherwise, it returns false. For example, you can use the following code to check if all elements in a list are even numbers:
numbers = [2, 4, 6, 8, 10]
result = all(x % 2 == 0 for x in numbers)
print(result)
enumerate(): The enumerate function is used to add an index to an iterable. It takes an iterable as an argument and returns an enumerate object, which can be used in a for loop. For example, you can use the following code to print the index and value of all elements in a list:
numbers = [1, 2, 3, 4, 5]
for index, value in enumerate(numbers):
print(index, value)
isinstance(): The isinstance function is used to check if an object is an instance of a certain class or a subclass. It takes two arguments: an object and a class. For example, you can use the following code to check if a variable is a list:
x = [1, 2, 3]
result = isinstance(x, list)
print(result)
zip(): The zip function is used to combine two or more lists into a single list of tuples. For example, you can use the following code to combine two lists:
list1 = [1, 2, 3]
list2 = [4, 5, 6]
print(list(zip(list1, list2)))
map(): The map function is …….