title: libgfortran.so.4: cannot open shared object file: No such file or directory
body: <p>Can you help me to go out from these error. It was a nightmare when i tried to solve it. Where is the error please?</p>
  
  <pre><code> File "/project/6008168/tamouze/Python_directory/lda2vec/examples/twenty_newsgroups/lda2vec/lda2vec_run.py", line 18, in &lt;module&gt;
      from lda2vec import utils
    File "/home/tamouze/anaconda2/envs/testing-env/lib/python2.7/site-packages/lda2vec/__init__.py", line 3, in &lt;module&gt;
      import tracking
    File "/home/tamouze/anaconda2/envs/testing-env/lib/python2.7/site-packages/lda2vec/tracking.py", line 2, in &lt;module&gt;
      from sklearn.linear_model import LinearRegression
    File "/home/tamouze/anaconda2/envs/testing-env/lib/python2.7/site-packages/scikit_learn-0.19.1-py2.7-linux-x86_64.egg/sklearn/__init__.py", line 134, in &lt;module&gt;
      from .base import clone
    File "/home/tamouze/anaconda2/envs/testing-env/lib/python2.7/site-packages/scikit_learn-0.19.1-py2.7-linux-x86_64.egg/sklearn/base.py", line 13, in &lt;module&gt;
      from .utils.fixes import signature
    File "/home/tamouze/anaconda2/envs/testing-env/lib/python2.7/site-packages/scikit_learn-0.19.1-py2.7-linux-x86_64.egg/sklearn/utils/__init__.py", line 11, in &lt;module&gt;
      from .validation import (as_float_array,
    File "/home/tamouze/anaconda2/envs/testing-env/lib/python2.7/site-packages/scikit_learn-0.19.1-py2.7-linux-x86_64.egg/sklearn/utils/validation.py", line 18, in &lt;module&gt;
      from ..utils.fixes import signature
    File "/home/tamouze/anaconda2/envs/testing-env/lib/python2.7/site-packages/scikit_learn-0.19.1-py2.7-linux-x86_64.egg/sklearn/utils/fixes.py", line 144, in &lt;module&gt;
      from scipy.sparse.linalg import lsqr as sparse_lsqr  # noqa
    File "/home/tamouze/anaconda2/envs/testing-env/lib/python2.7/site-packages/scipy-1.1.0rc1-py2.7-linux-x86_64.egg/scipy/sparse/linalg/__init__.py", line 114, in &lt;module&gt;
      from .isolve import *
    File "/home/tamouze/anaconda2/envs/testing-env/lib/python2.7/site-packages/scipy-1.1.0rc1-py2.7-linux-x86_64.egg/scipy/sparse/linalg/isolve/__init__.py", line 6, in &lt;module&gt;
      from .iterative import *
    File "/home/tamouze/anaconda2/envs/testing-env/lib/python2.7/site-packages/scipy-1.1.0rc1-py2.7-linux-x86_64.egg/scipy/sparse/linalg/isolve/iterative.py", line 10, in &lt;module&gt;
      from . import _iterative
  ImportError: libgfortran.so.4: cannot open shared object file: No such file or directory
  </code></pre>
  
  <p>im working on the following system:</p>
  
  <pre><code>Linux cdr352.int.cedar.computecanada.ca 3.10.0-693.11.6.el7.x86_64 #1 SMP Thu Jan 4 01:06:37 UTC 2018 x86_64 GNU/Linux
  
  Distributor ID: CentOS
  Description:    CentOS Linux release 7.4.1708 (Core)
  Release:        7.4.1708
  Codename:       Core
  </code></pre>
  
  <p>it is an ssh server.</p>