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using pip3: module "importlib._bootstrap" has no attribute "SourceFileLoader"

I have installed pip for python 3.6 on Ubuntu 14. After I run

sudo apt-get install python3-pip

to install pip3, it works very well. However, after installation, when I am trying to run

pip3 install packagename

to install a new package, something strange occurs:

File "/usr/lib/python3/dist-packages/", line 1479, in <module>
 register_loader-type(importlib_bootstrap.SourceFileLoader, DefaultProvider)
AttributeError: module "importlib._bootstrap" has no attribute "SourceFileLoader"

It seems that I did nothing wrong, and I really cannot figure out the reason.


  1. Faced the same problem. I think this is because python3.6 and pip3 were installed from different sources. I suggest using python's inbuilt facility to install pip i.e

    python3 -m ensurepip --upgrade

    This should install pip3 and pip3.x where x in python3.x. Same works for python2 also.