27.2. SingleField.flatten(): Flatten
single-character field
All fields derived from this class represent the .value in the instance as a one-character string.
To flatten such an instance, we merely return its .value attribute. We also handle the case where the
argument is None by returning a single space.
baseclasses.py
# - - - S i n g l e F i e l d . f l a t t e n - - -
@staticmethod
def flatten(object):
'''Flatten a single-column field.
'''
if object is None:
return ' '
else:
return object.value
