python class name is not defined

Title: Resolving "NameError: name 'ClassName' is not defined" in Python
Introduction:
One common error that Python developers encounter is the "NameError: name 'ClassName' is not defined." This error occurs when trying to use a class or variable that has not been defined in the current scope. In this tutorial, we will explore the reasons behind this error and how to resolve it with practical examples.
Understanding the Error:
The "NameError" is raised when the interpreter encounters an attempt to reference a name (variable, function, or class) that has not been defined in the current scope. When dealing with classes, this error often occurs when trying to instantiate or access methods of a class that has not been defined or imported.
Example 1: Class Not Defined
Example 2: Importing a Class from a Non-existent Module
How to Resolve "NameError: name 'ClassName' is not defined":
Check if the Class is Defined:
Ensure that the class is defined in the current module or imported from another module. If the class is defined in the same file, make sure it is defined before attempting to use it.
Check Module Import:
If you are importing a class from another module, verify that the module exists and is accessible from the current scope.
Review Variable Names:
Ensure that the variable name is spelled correctly and consistently throughout your code. Typos or case sensitivity issues can lead to NameErrors.
Conclusion:
The "NameError: name 'ClassName' is not defined" in Python usually stems from issues related to class definition, module import, or variable naming. By carefully reviewing your code and following the steps outlined in this tutorial, you can identify and resolve these errors, ensuring a smooth execution of your Python programs.
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