title: How to replace values in a pandas data frame column?
body: <p><a href="https://i.stack.imgur.com/2lMZr.jpg" rel="nofollow noreferrer">Here's the data frame</a></p>
  <p>In above data frame, how can I replace a values in 'user_id' column from &quot;Запись пользователя № — user_974&quot; to just &quot;user_974&quot; and instead of '#error' just put blank space '' there.</p>