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You can run
pip freeze > requirements.txt
You can open the generated file and check the djangorestframework==3.3.3 version
or edit it and then
pip install -r requirements.txt
Alternatively you can install Django Rest Framework by using
pip install djangorestframework==3.3.3
And if needed, any of the extension modules:
pip install djangorestframework-bulk==0.2.1
pip install djangorestframework-digestauth==1.1.0
pip install djangorestframework-extensions==0.0.3
pip install djangorestframework-filters==0.8.0
pip install djangorestframework-jwt==1.8.0
pip install djangorestframework-oauth==1.1.0
Source:stackexchange.com