Sep 3, 2025 · Learn how to fix the Python error "NameError: name is not defined" with clear examples, causes, and solutions. Easy guide for beginners and professionals.

Nov 17, 2014 · Your specific issue of NameError: name 'guess' is not defined is because guess is defined in your main function, but the while loop that it is failing on is outside of that function.

Jul 2, 2020 · What causes a Python NameError? The Python NameError occurs when Python cannot recognise a name in your program. A name can be either related to a built-in function or to …

The NameError: name '...' is not defined is one of Python's most fundamental errors. It occurs when you try to use a variable, function, class, or module that Python doesn't recognize in the current scope …

Jul 23, 2025 · Encountering the "NameError: name 'var' is not defined" is a common experience for Python users. In Python, variable declaration is a straightforward process of assigning a value. This …

Apr 11, 2025 · In this blog, we will delve deep into the concept of `NameError: name is not defined` in Python, explore its common causes, provide code examples, and discuss best practices to avoid it.

Apr 8, 2024 · The Python "NameError: name is not defined" occurs when we try to access a variable or a function that is not defined or before it is defined. To solve the error, make sure you haven't …

Feb 23, 2025 · Learn about Python NameError: Name is Not Defined, its causes, and how to fix it. Suitable for beginners with examples and solutions.

Nov 24, 2024 · A: A NameError occurs when you attempt to access a variable or class that hasn’t been defined yet. Ensure that your class is defined before you instantiate it.

Feb 11, 2025 · Python NameError is one of the most common Python exceptions . And the " . NameError: name is not defined. Python Error" occurs when we try to access a Python variable …