title: Getting error while installing CX_ORACLE in cmd
body: <p>I'm getting the below error while i try to install cx_Oracle through cmd in windows 10. When i try to install for the first time it asked me to install MS Visual C++ 14 and the to set a PATH and finally showing  in command prompt.</p>
  
  <blockquote>
    <p>Could not install packages due to an EnvironmentError</p>
  </blockquote>
  
  <pre><code>C:\Users\Dell&gt;pip install cx_Oracle==5.1.3
  Collecting cx_Oracle==5.1.3
    Using cached https://files.pythonhosted.org/packages/be/25/afc07a79ed268f6ab2e8959cfcff997504ce09500b881a1d93f92904762e/cx_Oracle-5.1.3.tar.gz
  Error checking for conflicts.
  Traceback (most recent call last):
    File "c:\users\dell\appdata\local\programs\python\python37-32\lib\site-packages\pip\_vendor\pkg_resources\__init__.py", line 2897, in _dep_map
      return self.__dep_map
    File "c:\users\dell\appdata\local\programs\python\python37-32\lib\site-packages\pip\_vendor\pkg_resources\__init__.py", line 2691, in __getattr__
      raise AttributeError(attr)
  AttributeError: _DistInfoDistribution__dep_map
  
  During handling of the above exception, another exception occurred:
  
  Traceback (most recent call last):
    File "c:\users\dell\appdata\local\programs\python\python37-32\lib\site-packages\pip\_vendor\pkg_resources\__init__.py", line 2888, in _parsed_pkg_info
      return self._pkg_info
    File "c:\users\dell\appdata\local\programs\python\python37-32\lib\site-packages\pip\_vendor\pkg_resources\__init__.py", line 2691, in __getattr__
      raise AttributeError(attr)
  AttributeError: _pkg_info
  
  During handling of the above exception, another exception occurred:
  
  Traceback (most recent call last):
    File "c:\users\dell\appdata\local\programs\python\python37-32\lib\site-packages\pip\_internal\commands\install.py", line 503, in _warn_about_conflicts
      package_set, _dep_info = check_install_conflicts(to_install)
    File "c:\users\dell\appdata\local\programs\python\python37-32\lib\site-packages\pip\_internal\operations\check.py", line 108, in check_install_conflicts
      package_set, _ = create_package_set_from_installed()
    File "c:\users\dell\appdata\local\programs\python\python37-32\lib\site-packages\pip\_internal\operations\check.py", line 47, in create_package_set_from_installed
      package_set[name] = PackageDetails(dist.version, dist.requires())
    File "c:\users\dell\appdata\local\programs\python\python37-32\lib\site-packages\pip\_vendor\pkg_resources\__init__.py", line 2635, in requires
      dm = self._dep_map
    File "c:\users\dell\appdata\local\programs\python\python37-32\lib\site-packages\pip\_vendor\pkg_resources\__init__.py", line 2899, in _dep_map
      self.__dep_map = self._compute_dependencies()
    File "c:\users\dell\appdata\local\programs\python\python37-32\lib\site-packages\pip\_vendor\pkg_resources\__init__.py", line 2908, in _compute_dependencies
      for req in self._parsed_pkg_info.get_all('Requires-Dist') or []:
    File "c:\users\dell\appdata\local\programs\python\python37-32\lib\site-packages\pip\_vendor\pkg_resources\__init__.py", line 2890, in _parsed_pkg_info
      metadata = self.get_metadata(self.PKG_INFO)
    File "c:\users\dell\appdata\local\programs\python\python37-32\lib\site-packages\pip\_vendor\pkg_resources\__init__.py", line 1410, in get_metadata
      value = self._get(self._fn(self.egg_info, name))
    File "c:\users\dell\appdata\local\programs\python\python37-32\lib\site-packages\pip\_vendor\pkg_resources\__init__.py", line 1522, in _get
      with open(path, 'rb') as stream:
  FileNotFoundError: [Errno 2] No such file or directory: 'c:\\users\\dell\\appdata\\local\\programs\\python\\python37-32\\lib\\site-packages\\cx_oracle-7.0.0.dist-info\\METADATA'
  Installing collected packages: cx-Oracle
    Found existing installation: cx-oracle 7.0.0
  Could not install packages due to an EnvironmentError: [Errno 2] No such file or directory: 'c:\\users\\dell\\appdata\\local\\programs\\python\\python37-32\\lib\\site-packages\\cx_oracle-7.0.0.dist-info\\RECORD'
  </code></pre>
  
  <p>I'm installing cx_Oracle to get connect between Django and Oracle database.</p>