title: Using pip install within PyScripter
body: <p>I want to install a Python package within a script in PyScripter.</p>
  
  <pre><code>import pip
  package = 'xlsxwriter'
  pip.main(['install', package])
  </code></pre>
  
  <p>Following error occurs:</p>
  
  <pre><code>Collecting xlsxwriter
    Downloading XlsxWriter-0.9.3-py2.py3-none-any.whl (136kB)
  Exception:
  Traceback (most recent call last):
    File "C:\Python27\ArcGIS10.4\lib\site-packages\pip\basecommand.py", line 215, in main
      status = self.run(options, args)
    File "C:\Python27\ArcGIS10.4\lib\site-packages\pip\commands\install.py", line 299, in run
      requirement_set.prepare_files(finder)
    File "C:\Python27\ArcGIS10.4\lib\site-packages\pip\req\req_set.py", line 370, in prepare_files
      ignore_dependencies=self.ignore_dependencies))
    File "C:\Python27\ArcGIS10.4\lib\site-packages\pip\req\req_set.py", line 587, in _prepare_file
      session=self.session, hashes=hashes)
    File "C:\Python27\ArcGIS10.4\lib\site-packages\pip\download.py", line 810, in unpack_url
      hashes=hashes
    File "C:\Python27\ArcGIS10.4\lib\site-packages\pip\download.py", line 649, in unpack_http_url
      hashes)
    File "C:\Python27\ArcGIS10.4\lib\site-packages\pip\download.py", line 871, in _download_http_url
      _download_url(resp, link, content_file, hashes)
    File "C:\Python27\ArcGIS10.4\lib\site-packages\pip\download.py", line 577, in _download_url
      progress_indicator = DownloadProgressBar(max=total_length).iter
    File "C:\Python27\ArcGIS10.4\lib\site-packages\pip\utils\ui.py", line 158, in __init__
      super(WindowsMixin, self).__init__(*args, **kwargs)
    File "C:\Python27\ArcGIS10.4\lib\site-packages\pip\utils\ui.py", line 82, in __init__
      super(InterruptibleMixin, self).__init__(*args, **kwargs)
    File "C:\Python27\ArcGIS10.4\lib\site-packages\pip\utils\ui.py", line 118, in __init__
      super(DownloadProgressMixin, self).__init__(*args, **kwargs)
    File "C:\Python27\ArcGIS10.4\lib\site-packages\pip\_vendor\progress\helpers.py", line 58, in __init__
      if self.file.isatty() and self.hide_cursor:
    File "&lt;string&gt;", line 523, in __getattr__
    File "C:\Program Files (x86)\PyScripter\Lib\rpyc.zip\rpyc\core\netref.py", line 150, in __getattr__
      return syncreq(self, consts.HANDLE_GETATTR, name)
    File "C:\Program Files (x86)\PyScripter\Lib\rpyc.zip\rpyc\core\netref.py", line 71, in syncreq
      return conn.sync_request(handler, oid, *args)
    File "C:\Program Files (x86)\PyScripter\Lib\rpyc.zip\rpyc\core\protocol.py", line 434, in sync_request
      raise obj
  AttributeError: DebugOutput instance has no attribute 'isatty' 
  </code></pre>
  
  <p>Why does this error occur und how to fix it? The same code works well when using the Python interpreter directly, but not with PyScripter for some reason.</p>
  
  <p>Thanks a lot for your help.</p>