title: Install requirements.txt with pip
body: <p>I am trying to install remote environment like on remote server using requirements.txt. </p>
  
  <p>So first I went to Server went to virtualenv by</p>
  
  <p><code>source bin/activate</code> and typed:</p>
  
  <pre><code>pip freeze &gt; requirements.txt 
  </code></pre>
  
  <p>then on my Windows machine I run:</p>
  
  <pre><code>pip2 install -r requirements.txt
  </code></pre>
  
  <p>I have currently Python27 on Server and Windos machine. </p>
  
  <p>This is output on my Windows 8:</p>
  
  <pre><code>Collecting Cap1xxx==0.1.3 (from -r requirements.txt (line 1))
    Using cached Cap1xxx-0.1.3.tar.gz
  Collecting ExplorerHAT==0.4.2 (from -r requirements.txt (line 2))
    Using cached ExplorerHAT-0.4.2.tar.gz
  Collecting Flask==0.10.1 (from -r requirements.txt (line 3))
    Using cached Flask-0.10.1.tar.gz
  Collecting Jinja2==2.7.3 (from -r requirements.txt (line 4))
    Using cached Jinja2-2.7.3.tar.gz
  Collecting MarkupSafe==0.23 (from -r requirements.txt (line 5))
    Using cached MarkupSafe-0.23.tar.gz
  Collecting Pillow==2.6.1 (from -r requirements.txt (line 6))
    Using cached Pillow-2.6.1-cp27-none-win32.whl
  Collecting ................. and so on
  
  
  Collecting urllib3==1.9.1 (from -r requirements.txt (line 43))
    Using cached urllib3-1.9.1-py2-none-any.whl
  Requirement already satisfied: virtualenv==15.1.0 in c:\python27\lib\site-packages (from -r requirements.txt (line 44))
  Collecting wheel==0.24.0 (from -r requirements.txt (line 45))
    Using cached wheel-0.24.0-py2.py3-none-any.whl
  Collecting wsgiref==0.1.2 (from -r requirements.txt (line 46))
    Using cached wsgiref-0.1.2.zip
  Collecting RPi.GPIO (from Cap1xxx==0.1.3-&gt;-r requirements.txt (line 1))
    Using cached RPi.GPIO-0.6.3.tar.gz
  Collecting PyOpenSSL (from ndg-httpsclient==0.3.2-&gt;-r requirements.txt (line 22))
  Collecting and everything is fine
  .............................
  </code></pre>
  
  <p>And then there is a traceback:</p>
  
  <pre><code>Running setup.py install for RPi.GPIO ... error
          Complete output from command c:\python27\python.exe -u -c "import setuptools, tokenize;__file__='c:\\users\\3c8a~1\\appdata\\local\\temp\\pip-build-tvvec2\\RPi.GPIO\\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\3c8a~1\appdata\local\temp\pip
      -kql53i-record\install-record.txt --single-version-externally-managed --compile:
          running install
          running build
          running build_py
          creating build
          creating build\lib.win32-2.7
          creating build\lib.win32-2.7\RPi
          copying RPi\__init__.py -&gt; build\lib.win32-2.7\RPi
          creating build\lib.win32-2.7\RPi\GPIO
          copying RPi\GPIO\__init__.py -&gt; build\lib.win32-2.7\RPi\GPIO
          running build_ext
          building 'RPi._GPIO' extension
          creating build\temp.win32-2.7
          creating build\temp.win32-2.7\Release
          creating build\temp.win32-2.7\Release\source
          C:\Users\Иван\AppData\Local\Programs\Common\Microsoft\Visual C++ for Python\9.0\VC\Bin\cl.exe /c /nologo /Ox /MD /W3 /GS- /DNDEBUG -Ic:\python27\include -Ic:\python27\PC /Tcsourc
      e/py_gpio.c /Fobuild\temp.win32-2.7\Release\source/py_gpio.obj
          py_gpio.c
          source/py_gpio.c(87) : error C2143: syntax error : missing ';' before '{'
          source/py_gpio.c(200) : error C2143: syntax error : missing ';' before '{'
          source/py_gpio.c(227) : warning C4047: 'return' : 'PyObject *' differs in levels of indirection from 'int'
          source/py_gpio.c(345) : error C2373: 'output' : redefinition; different type modifiers
                  c:\users\Ёў -\appdata\local\temp\pip-build-tvvec2\rpi.gpio\source\constants.h(29) : see declaration of 'output'
          source/py_gpio.c(345) : error C2143: syntax error : missing ';' before '{'
          source/py_gpio.c(359) : warning C4047: 'return' : 'PyObject *' differs in levels of indirection from 'int'
          error: command 'C:\\Users\\\xc8\xe2\xe0\xed\\AppData\\Local\\Programs\\Common\\Microsoft\\Visual C++ for Python\\9.0\\VC\\Bin\\cl.exe' failed with exit status 2
  </code></pre>
  
  <p>This is my requirements.txt:</p>
  
  <pre><code>Cap1xxx==0.1.3
  ExplorerHAT==0.4.2
  Flask==0.10.1
  Jinja2==2.7.3
  MarkupSafe==0.23
  Pillow==2.6.1
  Werkzeug==0.9.6
  argparse==1.2.1
  automationhat==0.0.4
  blinker==1.3
  blinkt==0.1.0
  chardet==2.3.0
  colorama==0.3.2
  drumhat==0.0.5
  envirophat==0.0.6
  fourletterphat==0.0.2
  html5lib==0.999
  itsdangerous==0.24
  microdotphat==0.1.3
  mote==0.0.3
  motephat==0.0.2
  ndg-httpsclient==0.3.2
  numpy==1.8.2
  phatbeat==0.0.2
  pianohat==0.0.5
  picamera==1.13
  picraft==1.0
  piglow==1.2.4
  pyasn1==0.1.7
  pyserial==2.6
  rainbowhat==0.0.2
  requests==2.4.3
  scrollphat==0.0.7
  scrollphathd==1.0.1
  sense-emu==1.0
  sense-hat==2.2.0
  six==1.8.0
  skywriter==0.0.7
  sn3218==1.2.7
  spidev==3.0
  touchphat==0.0.1
  twython==3.1.2
  urllib3==1.9.1
  virtualenv==15.1.0
  wheel==0.24.0
  wsgiref==0.1.2
  </code></pre>
  
  <p>I do not understand this traceback and how to handle this....</p>
  
  <p>Maybe because at the beginning I tried to install dependencies using file getting from Server not being in vertualenv.. And some traces remain in cache, but when I clean cache of pip nothing changes. </p>
  
  <p>So what is the problem here and how to handle it?</p>
  
  <p>Thanks in advance!</p>
  
  <p><strong>EDIT ONE:</strong></p>
  
  <p>The problem is that RPI.gpio is only for linux machine (for Raspberry Pi to be more exact) and I am trying to install it on Windows. </p>
  
  <p>So should I somehow to clean /tmp or cache...?</p>