{"id":4657,"date":"2022-09-10T02:23:56","date_gmt":"2022-09-10T02:23:56","guid":{"rendered":"https:\/\/www.pythontutorial.net\/?page_id=4657"},"modified":"2022-09-10T02:35:24","modified_gmt":"2022-09-10T02:35:24","slug":"python-enumerate","status":"publish","type":"page","link":"https:\/\/www.pythontutorial.net\/python-built-in-functions\/python-enumerate\/","title":{"rendered":"Python enumerate"},"content":{"rendered":"\n

Summary<\/strong>: in this tutorial, you will learn about the enumerate()<\/code> function and how to use it to enumerate a sequence, iterator, or any other object that supports iteration.<\/p>\n\n\n\n

Introduction to the Python enumerate() function #<\/a><\/h2>\n\n\n\n

The following example defines a list<\/a> of fruits and uses the for-in<\/a> loop to iterate over the list elements and print them out:<\/p>\n\n\n

fruits = ['Apple'<\/span>, 'Orange'<\/span>, 'Strawberry'<\/span>]\n\nfor<\/span> fruit in<\/span> fruits:\n    print(fruit)<\/code><\/span>Code language:<\/span> Python<\/span> (<\/span>python<\/span>)<\/span><\/small><\/pre>\n\n\n
Output:<\/p>\n\n\n
Apple\nOrange    \nStrawberry<\/code><\/span>Code language:<\/span> Python<\/span> (<\/span>python<\/span>)<\/span><\/small><\/pre>\n\n\n
It works fine as expected.<\/p>\n\n\n\n
Sometimes, you want to add indices to the output. To do that, you may come up with a loop counter like this:<\/p>\n\n\n
fruits = ['Apple'<\/span>, 'Orange'<\/span>, 'Strawberry'<\/span>]\n\nindex = 1<\/span>\n\nfor<\/span> fruit in<\/span> fruits:\n    print(f'{index}<\/span>.{fruit}<\/span>'<\/span>)\n    index += 1<\/span><\/code><\/span>Code language:<\/span> Python<\/span> (<\/span>python<\/span>)<\/span><\/small><\/pre>\n\n\n
Output:<\/p>\n\n\n
1.<\/span>Apple\n2.<\/span>Orange\n3.<\/span>Strawberry<\/code><\/span>Code language:<\/span> Python<\/span> (<\/span>python<\/span>)<\/span><\/small><\/pre>\n\n\n
In this example, the index keeps track of the indices. This example also works as expected. But Python has a better solution with the enumerate()<\/code> function:<\/p>\n\n\n
fruits = ['Apple'<\/span>, 'Orange'<\/span>, 'Strawberry'<\/span>]\n\nfor<\/span> index, fruit in<\/span> enumerate(fruits, start=1<\/span>):\n    print(f'{index}<\/span>.{fruit}<\/span>'<\/span>)<\/code><\/span>Code language:<\/span> Python<\/span> (<\/span>python<\/span>)<\/span><\/small><\/pre>\n\n\n
Output:<\/p>\n\n\n
1.<\/span>Apple\n2.<\/span>Orange\n3.<\/span>Strawberry<\/code><\/span>Code language:<\/span> Python<\/span> (<\/span>python<\/span>)<\/span><\/small><\/pre>\n\n\n
With the enumerate()<\/code> function, you can achieve the same result with less code. Also, you don’t need to keep track of the index by increasing it in each iteration. <\/p>\n\n\n\n
The enumerate()<\/code> is a built-in function with the following syntax:<\/p>\n\n\n
enumerate(iterable, start=0<\/span>)<\/code><\/span>Code language:<\/span> Python<\/span> (<\/span>python<\/span>)<\/span><\/small><\/pre>\n\n\n
The enumerate()<\/code> function accepts two arguments:<\/p>\n\n\n\n