Problem to create virtualenv for python3

Error of creating a virtual environment under LINUX with command:

virtualenv env3 --python=python3

The error message is as below:
...

Installing setuptools, pip...
  Complete output from command /home/swamydkv/py_virenv/test/bin/python3 -c "import sys, pip; pip...ll\"] + sys.argv[1:])" setuptools pip:
  Traceback (most recent call last):    
  File "<string>", line 1, in <module>
  File "<frozen importlib._bootstrap>", line 1565, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1532, in _find_and_load_unlocked

...

Solution:

uninstall virtualenv  -->  sudo pip uninstall virtualenv

reinstall virtualenv  -->  sudo easy-install "virtualenv<1.11"

do not reinstall using command  --> sudo pip intall virtualenv , it does not work.