title: python - for loop over list - returns error "too many values to unpack"
body: <p>I know there are many occurences of that question on the site, but the dozen or so that i read failed to address that simple problem:</p>
  
  <pre><code>for df, ind_source in ["df1", "df2", "df3"], ["investingcom", "bloomberg", "ft"]:
          print(df+" "+ind_source)
  </code></pre>
  
  <p>returns error value: <code>too many values to unpack (expected 2)</code></p>
  
  <p>What is the solution to that problem?</p>