{"id":860,"date":"2020-10-28T04:05:47","date_gmt":"2020-10-28T04:05:47","guid":{"rendered":"https:\/\/www.pythontutorial.net\/?page_id=860"},"modified":"2025-03-31T01:56:30","modified_gmt":"2025-03-31T01:56:30","slug":"python-pass","status":"publish","type":"page","link":"https:\/\/www.pythontutorial.net\/python-basics\/python-pass\/","title":{"rendered":"Python pass"},"content":{"rendered":"\n

Summary<\/strong>: in this tutorial, you’ll learn how to use the Python pass<\/code> statement as a placeholder.<\/p>\n\n\n\n

Introduction to the Python pass statement #<\/a><\/h2>\n\n\n\n

Suppose that you have the following if...else<\/a><\/code> statement:<\/p>\n\n\n

counter = 1<\/span>\nmax = 10<\/span>\nif<\/span> counter <= max:\n    counter += 1<\/span>\nelse<\/span>:\n    # implement later<\/span>\n<\/code><\/span>Code language:<\/span> Python<\/span> (<\/span>python<\/span>)<\/span><\/small><\/pre>\n\n\n
In the else<\/code> clause, you haven’t got any code yet. But you’ll write code for this else<\/code> clause later.<\/p>\n\n\n\n
In this case, if you run the code, you’ll get a syntax error (SyntaxError<\/code>).<\/p>\n\n\n\n
This is where the Python pass<\/code> statement comes into play:<\/p>\n\n\n
counter = 1<\/span>\nmax = 10<\/span>\nif<\/span> counter <= max:\n    counter += 1<\/span>\nelse<\/span>:\n    pass<\/span><\/code><\/span>Code language:<\/span> Python<\/span> (<\/span>python<\/span>)<\/span><\/small><\/pre>\n\n\n
The pass<\/code> statement is a statement that does nothing. It’s just a placeholder for the code that you’ll write in the future.<\/p>\n\n\n\n
When you run the code that contains a pass<\/code> statement, the Python interpreter will treat the pass<\/code> statement as a single statement. As a result, it doesn’t issue a syntax error.<\/p>\n\n\n\n
Technically, you can use the pass<\/code> statement in many statement in Python.<\/p>\n\n\n\n
Let’s take some examples of using the pass<\/code> statement.<\/p>\n\n\n\n
Using the Python pass statement with the if statement example #<\/a><\/h3>\n\n\n\n
The following shows how to use the pass<\/code> statement with an if<\/code> statement:<\/p>\n\n\n
if<\/span> condition:\n    pass<\/span><\/code><\/span>Code language:<\/span> Python<\/span> (<\/span>python<\/span>)<\/span><\/small><\/pre>\n\n\n
Using the Python pass statement with the for statement #<\/a><\/h3>\n\n\n\n
This example shows how to use the pass<\/code> statement in a for<\/a><\/code> loop:<\/p>\n\n\n
for<\/span> i in<\/span> range(1<\/span>,100<\/span>):\n    pass<\/span><\/code><\/span>Code language:<\/span> Python<\/span> (<\/span>python<\/span>)<\/span><\/small><\/pre>\n\n\n
Using the Python pass statement with the while statement #<\/a><\/h3>\n\n\n\n
The following example shows how to use the pass<\/code> statement with a while<\/a><\/code> loop:<\/p>\n\n\n
while<\/span> condition:\n    pass<\/span><\/code><\/span>Code language:<\/span> Python<\/span> (<\/span>python<\/span>)<\/span><\/small><\/pre>\n\n\n
Using the Python pass statement with functions and classes #<\/a><\/h3>\n\n\n\n
Later, you’ll learn how to define a function<\/a>:<\/p>\n\n\n
def<\/span> fn<\/span>()<\/span>:<\/span>\n    pass<\/span><\/code><\/span>Code language:<\/span> Python<\/span> (<\/span>python<\/span>)<\/span><\/small><\/pre>\n\n\n
class<\/span> Stream<\/span>:<\/span>\n    pass<\/span><\/code><\/span>Code language:<\/span> Python<\/span> (<\/span>python<\/span>)<\/span><\/small><\/pre>\n\n\n
In these examples, you use the pass<\/code> statement to mark the function and class empty.<\/p>\n\n\n\n
Summary #<\/a><\/h2>\n\n\n\n
and a class<\/a>:<\/p>\n\n\n
Try it<\/a><\/p>\n\n\n\n
Try it<\/a><\/p>\n\n\n\n