class_docstr: Reads a fixed-width file using a column schema in CSV format.
  
  This works almost exactly like Python's built-in CSV reader.
  
  Schemas must be in the "ffs" format, with :code:`column`, :code:`start`,
  and :code:`length` columns. There is a repository of such schemas
  maintained at `wireservice/ffs <https://github.com/wireservice/ffs>`_.
code: def __next__(self):
      line = next(self.file)
  
      values = []
  
      for field in self.fields:
          values.append(
              line[field.start : field.start + field.length].strip()
          )
  
      return values
  
file_path: agate/agate/fixed.py
imports: from collections import OrderedDict, namedtuple
label_desc: Use image node_id 3 for calling the Reader obj's underlying member method code with example usage: obj.__next__() and returns: values