title: how to check if a cell is empty in openpyxl python
body: <p>I'm making a conditional statement in <code>openpyxl</code> Python to check if a cell is empty. Here's my code:    </p>
  
  <pre><code>newlist = []
  looprow = 1
  print ("Highest col",readex.get_highest_column())
  getnewhighcolumn = readex.get_highest_column()        
  for i in range(0, lengthofdict):
      prevsymbol = readex.cell(row = looprow,column=getnewhighcolumn).value
      if prevsymbol == "None":
          pass
      else:
          newstocks.append(prevsymbol)
          looprow += 1
      #print (prevsymbol)
  print(newlist)
  </code></pre>
  
  <p>I tried <code>if prevsymbol == "":</code> and <code>if prevsymbol == null:</code> to no avail.</p>