Using a context manager to hide complexity & separate concerns

context_manager_hiding_complexity.py

class ExcelContext():
  def __enter__(self, filename='numbers.xls'):
    #..set up an excel document: eg: self.fn = filename..
    return self

  def write(self,data):
    #..do the excel cell writing & any formatting etc etc. 
    pass

  def __exit__(self):
    #..close the excel doc etc.
    pass

# Then in the code the writing is easy & only about the writing of the data:

with ExcelContext() as excel:
  excel.write('mydata')
  excel.write('otherdata')