Скачать или смотреть [SOLVED] How to Fix ImportError No module named 'flask' with virtualenv

Import Error is the most common error you will encounter in the python programming, especially if you are new to python. The error says that the python interpreter cannot find the libraries which you are referring to in the code. Though the module is already installed.

There could be different reasons for this error. Most common ones are

1. Using modules meant for different python versions. Installing python 2.x modules in python 3.x and vice a versa.

2. Improper setting of the PATH variable.

3. If you are using a python virtual environment. This virtual environment requires activation and dedicated installation of modules inside the virtual environment. It has to be installed after creating a virtual environment. The libraries will reside inside the folder created for the virtual environment.

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