title: iteration through column values in python w.r.t index
body: <p><a href="https://i.stack.imgur.com/pyjiN.png" rel="nofollow noreferrer">enter image description here</a></p>
  <p>where columns are true ,i want column name,
  where more than one columns are true: columns name separated with /</p>
  <p>blank cells are empty string</p>
  <p>Required output:</p>
  <p>Natural gas: Dark cloud
  Copper : Bearish Harami
  Nickel : bearish belthold
  Aluminium : inverted hammer/bearish harami</p>