When i run following command in my Django project:

> 
> pip install -r requirements.txt --upgrade
> 
> 
> 

I get following error:

> 
> Detected a distutils installed project ('argparse') which we cannot uninstall. The metadata provided by distutils does not contain
>  a list of files which have been installed, so pip does not know which
>  files to uninstall.
> 
> 
> 

My requirements.txt file is as follow:

```
Django==1.8.1
MySQL-python==1.2.5
pycrypto==2.6.1
Pillow==2.4.0
simplejson==2.3.2
uWSGI==2.0.8
pyBarcode==0.7
python-dateutil==2.4.0
xlwt==0.7.5
xhtml2pdf==0.0.6
reportlab==3.1.8
pymssql==2.0.1
boto
raven==5.1.1
djangorestframework==3.2.2
djangorestframework-jwt
django-model-utils==2.3.1
django-rest-swagger==0.3.3
django-session-security
pytz==2014.4
testtools
extras
testscenarios
django-ipware

```

My pip version is pip 8.0.0 and I am using ubuntu. Can any one help to resolve issue?