Error in pip install matplotlib in Mac
<p>When I do </p>

<pre><code>pip install matplotlib --upgrade --user
</code></pre>

<p>I dont get any error but my program fails saying</p>

<pre><code>Traceback (most recent call last):
  File "forest.py", line 22, in &lt;module&gt;
    matplotlib.style.use('ggplot')
AttributeError: 'module' object has no attribute 'style'
</code></pre>

<p>when I try to upgrade matplotlib without --user I get following error </p>

<pre><code>$ pip install matplotlib --upgrade 
Collecting matplotlib
  Using cached matplotlib-1.5.2-cp27-cp27m-macosx_10_6_intel.macosx_10_9_intel.macosx_10_9_x86_64.macosx_10_10_intel.macosx_10_10_x86_64.whl
Requirement already up-to-date: cycler in /Users/vangapellisanthosh/Library/Python/2.7/lib/python/site-packages (from matplotlib)
Collecting pyparsing!=2.0.0,!=2.0.4,!=2.1.2,&gt;=1.5.6 (from matplotlib)
  Using cached pyparsing-2.1.8-py2.py3-none-any.whl
Collecting pytz (from matplotlib)
  Using cached pytz-2016.6.1-py2.py3-none-any.whl
Collecting numpy&gt;=1.6 (from matplotlib)
  Using cached numpy-1.11.1-cp27-cp27m-macosx_10_6_intel.macosx_10_9_intel.macosx_10_9_x86_64.macosx_10_10_intel.macosx_10_10_x86_64.whl
Collecting python-dateutil (from matplotlib)
  Using cached python_dateutil-2.5.3-py2.py3-none-any.whl
Collecting six (from cycler-&gt;matplotlib)
  Using cached six-1.10.0-py2.py3-none-any.whl
Installing collected packages: pyparsing, pytz, numpy, six, python-dateutil, matplotlib
  Found existing installation: pyparsing 2.0.1
    DEPRECATION: Uninstalling a distutils installed project (pyparsing) has been deprecated and will be removed in a future version. This is due to the fact that uninstalling a distutils project will only partially uninstall the project.
    Uninstalling pyparsing-2.0.1:
Exception:
Traceback (most recent call last):
  File "/Library/Python/2.7/site-packages/pip-8.1.2-py2.7.egg/pip/basecommand.py", line 215, in main
    status = self.run(options, args)
  File "/Library/Python/2.7/site-packages/pip-8.1.2-py2.7.egg/pip/commands/install.py", line 317, in run
    prefix=options.prefix_path,
  File "/Library/Python/2.7/site-packages/pip-8.1.2-py2.7.egg/pip/req/req_set.py", line 736, in install
    requirement.uninstall(auto_confirm=True)
  File "/Library/Python/2.7/site-packages/pip-8.1.2-py2.7.egg/pip/req/req_install.py", line 742, in uninstall
    paths_to_remove.remove(auto_confirm)
  File "/Library/Python/2.7/site-packages/pip-8.1.2-py2.7.egg/pip/req/req_uninstall.py", line 115, in remove
    renames(path, new_path)
  File "/Library/Python/2.7/site-packages/pip-8.1.2-py2.7.egg/pip/utils/__init__.py", line 267, in renames
    shutil.move(old, new)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/shutil.py", line 302, in move
    copy2(src, real_dst)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/shutil.py", line 131, in copy2
    copystat(src, dst)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/shutil.py", line 103, in copystat
    os.chflags(dst, st.st_flags)
OSError: [Errno 1] Operation not permitted: '/var/folders/7j/19zzrqpn5dl6ghw1pms6k2m80000gp/T/pip-FEDiKY-uninstall/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/pyparsing-2.0.1-py2.7.egg-info'
</code></pre>

<p>How do i solve it?</p>

<p>It seems like your first error is because you are searching for style in matplotlib and not matplotlib.pyplot. Normally, it should work anyway but try this.</p>

<p>Try changing this: </p>

<pre><code>matplotlib.style.use('ggplot')
</code></pre>

<p>By adding this in the beginning of your code:</p>

<pre><code>import matplotlib.pyplot as plt
</code></pre>

<p>Then use:</p>

<pre><code>plt.style.use('ggplot')
</code></pre>

<p>For the second error, pip tries to uninstall pyparsing but somehow don't have the permission. If you are the administrator try using:</p>

<pre><code>sudo pip install matplotlib --upgrade
</code></pre>

python osx matplotlib