title: how to make groups of positive sign groups and negative sign groups
body: <p>dataframe have column A , i want to check when continuous values are negative group and positive values group ,</p>
  <pre><code>df=pd.DataFrame({'A':[0,-1203,-159,-35,0,0,0,0,205,-11,0,0,0,-145,-14,-12,0,182]}
  
  
  Negative values group 1
  0,-1203,-159,-35,0,0,0,0
  
  positive values group 1
  205
  
  Negative values group 2
  -11,0,0,0,-145,-14,-12,0
  positive values group 2
  182
  </code></pre>