title: pip install robotframework-desktoplibrary : failed. Why can't install?
body: <p>I tried to install desktoplibrary but get the error below : </p>
  
  <pre><code>pip install robotframework-desktoplibrary
  
  Collecting robotframework-desktoplibrary
    Downloading https://files.pythonhosted.org/packages/2f/dc/02d773cb2a052a77b226
  e11a7104d506ecb827798bb4395757104eb0118f/robotframework-desktoplibrary-1.0.1.zip
   (15.6MB)
       |████████████████████████████████| 15.6MB 1.7MB/s
      ERROR: Command errored out with exit status 1:
       command: 'c:\users\sqaadmin\appdata\local\programs\python\python37\python.e
  xe' -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'C:\\Users\\sqaadmin
  \\AppData\\Local\\Temp\\1\\pip-install-1m3ui56u\\robotframework-desktoplibrary\\
  setup.py'"'"'; __file__='"'"'C:\\Users\\sqaadmin\\AppData\\Local\\Temp\\1\\pip-i
  nstall-1m3ui56u\\robotframework-desktoplibrary\\setup.py'"'"';f=getattr(tokenize
  , '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'
  "'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' egg_info --egg-ba
  se 'C:\Users\sqaadmin\AppData\Local\Temp\1\pip-install-1m3ui56u\robotframework-d
  esktoplibrary\pip-egg-info'
           cwd: C:\Users\sqaadmin\AppData\Local\Temp\1\pip-install-1m3ui56u\robotf
  ramework-desktoplibrary\
      Complete output (5 lines):
      Traceback (most recent call last):
        File "&lt;string&gt;", line 1, in &lt;module&gt;
        File "C:\Users\sqaadmin\AppData\Local\Temp\1\pip-install-1m3ui56u\robotfra
  mework-desktoplibrary\setup.py", line 4, in &lt;module&gt;
          execfile(join(dirname(abspath(__file__)), 'target', 'src', 'SikuliLibrar
  y', 'version.py'))
      NameError: name 'execfile' is not defined
      ----------------------------------------
  ERROR: Command errored out with exit status 1: python setup.py egg_info Check th
  e logs for full command output.
  
  </code></pre>