title: Warning on regex string in Python
body: <p>So, I am doing a small function to strip all the weird chars from a string, eg. <code>#$&amp;</code> will be replaced just for a <code>" "</code></p>
  
  <p>The chars I am trying to remove are the following, defined into a string: 
  <code>xChars = r"#$%()'^*\;:/|+_.–°ªº"</code></p>
  
  <p>However I kepp getting the warning: 
  <code>Anomalous backslash in string: '\;'. String constant might be missing an r prefix</code> </p>
  
  <p>However, when i used the r prefix eg. <code>r"\"</code> python rules out some of the special chars i want to replace. It doesnt produce an error it just thinks that those chars are ok or something and it rules them out.</p>
  
  <p>Any ideas on how to fix this ?</p>