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External environment: Ubuntu 16.04, 64bits, global environment: python2.7

When PIP install wordcloud is executed in the virtual environment (python3.5), the installation fails with an error

error: command 'x86_64-linux-gnu-gcc' failed with exit status 1
  
  ----------------------------------------
  Failed building wheel for wordcloud
  Running setup.py clean for wordcloud
Failed to build wordcloud

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Reference:

http://www.cnblogs.com/canitang/p/7994184.html