Nameerror : name 'os' is not defined ( Solved )

NameError is an error most coder gets when they use the module,variables ,function without importing or defining. Nameerror: name ‘os’ is not defined is one of them. In this tutorial, you will know why this error comes and how to solve it using various solutions.

What is NameError?

The NameError is an error you will get when you are using the variable or function without defining it. You will also get the error when you forget to import the module you are using in the code. The best way to solve the error is to import the module and then use it in your code.

Why Nameerror : name ‘os’ is not defined as Error Comes?

The root cause for getting this error is that you are using the os module function without importing it. For example I want to know the path for the virtual environment then I will use the os.environ[‘VIRTUAL_ENV_PROMPT’]. If I will use it without importing the os module then I will get the error.

Run the below lines of code you will get the error.

print(os.environ['VIRTUAL_ENV_PROMPT'])

Output

Nameerror : name 'os' is not defined

Solution of Nameerror : name ‘os’ is not defined Error

The solution for this error is very simple you have to import the os module before using it in the code. You can import the module using the import statement.

import os

Now you will not get the error when you run the below lines of code.

import os
print(os.environ['VIRTUAL_ENV_PROMPT'])

Conclusion

Mostly You will get the name ‘os’ is not defined error when you are using the module function without importing the module. The only solution is to import the module. If you are getting the Nameerror : name ‘os’ is not defined then the above solution will work for you.

I hope you have liked this tutorial. If you have any queries then you can contact us for more help.