Errors/Python

TypeError: Expected String or Bytes-Like Object

TypeError: expected string or bytes-like object, got 'NoneType'

Quick Answer

You passed None to a function expecting a string, like re.match() or str methods. Check that your variable is not None first.

Why This Happens

Functions like re.match(), re.sub(), and str.join() expect string arguments. Passing None raises TypeError.

The Problem

import re
text = None
result = re.match(r'\d+', text)

The Fix

import re
text = get_text() or ''
result = re.match(r'\d+', text)

Step-by-Step Fix

  1. 1

    Check for None

    Add 'if text is not None:' before string functions.

  2. 2

    Provide defaults

    Use 'value or empty_string' to replace None.

  3. 3

    Validate input types

    Use isinstance(text, str) to verify type.

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Related Errors

AttributeError: NoneType Has No Attribute

AttributeError: 'NoneType' object has no attribute 'append'

TypeError: Argument Must Be str, Not bytes

TypeError: a bytes-like object is required, not 'str'