title: pip install pyswisseph giving error on windows 10
body: <p>When I run the command </p>
  
  <pre><code>pip install pyswisseph
  </code></pre>
  
  <p>to install the python extension of the <a href="http://pypi.org/project/pyswisseph/" rel="nofollow noreferrer">swiss ephemeris</a>, its giving errors.</p>
  
  <pre><code>C:\WINDOWS\system32&gt;pip install pyswisseph
  Collecting pyswisseph
    Using cached https://files.pythonhosted.org/packages/09/27/10ad652fa0e07fc89890142a6f900725e26cf02a24d8fd724015e08707b5/pyswisseph-2.00.00-2.tar.bz2
  Building wheels for collected packages: pyswisseph
    Running setup.py bdist_wheel for pyswisseph ... error
    Complete output from command c:\users\narayana\appdata\local\programs\python\python37\python.exe -u -c "import setuptools, tokenize;__file__='C:\\Users\\Narayana\\AppData\\Local\\Temp\\pip-install-wlypji8s\\pyswisseph\\setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" bdist_wheel -d C:\Users\Narayana\AppData\Local\Temp\pip-wheel-f31zjcrt --python-tag cp37:
    Searching system libswe...
    pkg-config not found
    Using internal libswe
    c:\users\narayana\appdata\local\programs\python\python37\lib\site-packages\setuptools\dist.py:398: UserWarning: Normalizing '2.00.00-2' to '2.0.0.post2'
      normalized_version,
    running bdist_wheel
    running build
    running build_ext
    building 'swisseph' extension
    creating build
    creating build\temp.win-amd64-3.7
    creating build\temp.win-amd64-3.7\Release
    creating build\temp.win-amd64-3.7\Release\libswe
    creating build\temp.win-amd64-3.7\Release\swephelp
    C:\Program Files (x86)\Microsoft Visual Studio\2017\BuildTools\VC\Tools\MSVC\14.13.26128\bin\HostX86\x64\cl.exe /c /nologo /Ox /W3 /GL /DNDEBUG /MD -Ilibswe -Iswephelp -Ic:\users\narayana\appdata\local\programs\python\python37\include -Ic:\users\narayana\appdata\local\programs\python\python37\include "-IC:\Program Files (x86)\Microsoft Visual Studio\2017\BuildTools\VC\Tools\MSVC\14.13.26128\include" /Tcpyswisseph.c /Fobuild\temp.win-amd64-3.7\Release\pyswisseph.obj -std=gnu99
    cl : Command line warning D9002 : ignoring unknown option '-std=gnu99'
    pyswisseph.c
    c:\users\narayana\appdata\local\programs\python\python37\include\pyconfig.h(59): fatal error C1083: Cannot open include file: 'io.h': No such file or directory
    error: command 'C:\\Program Files (x86)\\Microsoft Visual Studio\\2017\\BuildTools\\VC\\Tools\\MSVC\\14.13.26128\\bin\\HostX86\\x64\\cl.exe' failed with exit status 2
  
    **----------------------------------------
    Failed building wheel for pyswisseph**
    Running setup.py clean for pyswisseph
  Failed to build pyswisseph
  Installing collected packages: pyswisseph
    Running setup.py install for pyswisseph ... error
      Complete output from command c:\users\narayana\appdata\local\programs\python\python37\python.exe -u -c "import setuptools, tokenize;__file__='C:\\Users\\Narayana\\AppData\\Local\\Temp\\pip-install-wlypji8s\\pyswisseph\\setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" install --record C:\Users\Narayana\AppData\Local\Temp\pip-record-00ch1s58\install-record.txt --single-version-externally-managed --compile:
      Searching system libswe...
      pkg-config not found
      Using internal libswe
      c:\users\narayana\appdata\local\programs\python\python37\lib\site-packages\setuptools\dist.py:398: UserWarning: Normalizing '2.00.00-2' to '2.0.0.post2'
        normalized_version,
      running install
      running build
      running build_ext
      building 'swisseph' extension
      creating build
      creating build\temp.win-amd64-3.7
      creating build\temp.win-amd64-3.7\Release
      creating build\temp.win-amd64-3.7\Release\libswe
      creating build\temp.win-amd64-3.7\Release\swephelp
      C:\Program Files (x86)\Microsoft Visual Studio\2017\BuildTools\VC\Tools\MSVC\14.13.26128\bin\HostX86\x64\cl.exe /c /nologo /Ox /W3 /GL /DNDEBUG /MD -Ilibswe -Iswephelp -Ic:\users\narayana\appdata\local\programs\python\python37\include -Ic:\users\narayana\appdata\local\programs\python\python37\include "-IC:\Program Files (x86)\Microsoft Visual Studio\2017\BuildTools\VC\Tools\MSVC\14.13.26128\include" /Tcpyswisseph.c /Fobuild\temp.win-amd64-3.7\Release\pyswisseph.obj -std=gnu99
      cl : Command line warning D9002 : ignoring unknown option '-std=gnu99'
      pyswisseph.c
      c:\users\narayana\appdata\local\programs\python\python37\include\pyconfig.h(59): fatal error C1083: Cannot open include file: 'io.h': No such file or directory
      error: command 'C:\\Program Files (x86)\\Microsoft Visual Studio\\2017\\BuildTools\\VC\\Tools\\MSVC\\14.13.26128\\bin\\HostX86\\x64\\cl.exe' failed with exit status 2
  
      **----------------------------------------
  Command "c:\users\narayana\appdata\local\programs\python\python37\python.exe -u -c "import setuptools, tokenize;__file__='C:\\Users\\Narayana\\AppData\\Local\\Temp\\pip-install-wlypji8s\\pyswisseph\\setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" install --record C:\Users\Narayana\AppData\Local\Temp\pip-record-00ch1s58\install-record.txt --single-version-externally-managed --compile" failed with error code 1 in C:\Users\Narayana\AppData\Local\Temp\pip-install-wlypji8s\pyswisseph\**
  
  C:\WINDOWS\system32&gt;
  </code></pre>