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.

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 …

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 …

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 …

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 …

Nov 13, 2025 · In this blog, we’ll demystify why this error occurs when using `input ()`, break down common scenarios that trigger it, and provide step-by-step solutions to fix and prevent it. By …

Feb 23, 2025 · Encountering a NameError in Python can be frustrating. This error occurs when Python cannot find a name in your code. Let's explore how to fix it. What is a NameError? A …

Jul 2, 2020 · You execute your Python program and you see an error, "NameError: name ... is not defined". What does it mean? Let's see how you can quickly fix it.

Feb 2, 2024 · We will also learn how to fix the NameError: name 'python' is not defined when we call Python inside the interpreter instead of the terminal in Python. Sometimes we encounter a …