String matching in Python and IF command

I have a list of different names. I want to take one name at a time and match it with values in a particular column in a data frame. If the conditions are met, the following calculation will be performed:

orderno == orderno + 1

However, unfortunately, the code does not seem to work. Is there anything that I can do to make sure it works?

DfCustomers['orderno'] = 0
for i in uniquecustomer:
  if i == "DfCustomers['EntityName']":
        orderno == orderno + 1