title: ImageMagick Conversion from .ps to .png, run from python - invalid param
body: <p>I have been looking through some similar posts and through the ImageMagick page, but I cannot seem to find a reason for my issue:</p>
  
  <p><strong>Note</strong> I am using a windows machine.</p>
  
  <p>I have a .ps image in a folder and it works when running with the command to convert it from the cmd: <code>convert saved.ps newsaved.png</code></p>
  
  <p><strong>However</strong> when I try to execute it from my python script with the following code:</p>
  
  <p><code>args = ["convert","saved.ps newsave.png"]
   subprocess.Popen(args)
   #or this call(args)
   os.system("start newsave.png")</code></p>
  
  <p>The cmd window says that newsave.png is an invalid parameter. (The error message being: <code>Invalid parameter - newsave.png</code> in the cmd window, which then closes instantly) </p>
  
  <p>Having the everything seperated by a comma in <code>args</code> has also not helped. <code>os.getcwd()</code> returns the current work directory as well, so I know I'm in the right dir. The error happens when the subprocess is called.</p>