parameters: (self)
docstring: Validate the input format, ensure it is the correct string formatting style
docstring_summary: Validate the input format, ensure it is the correct string formatting style
docstring_tokens: Validate the input format ensure it is the correct string formatting style
function: def validate(self):
          """Validate the input format, ensure it is the correct string formatting style"""
          fields = set()
          try:
              for _, fieldname, spec, conversion in _str_formatter.parse(self._fmt):
                  if fieldname:
                      if not self.field_spec.match(fieldname):
                          raise ValueError('invalid field name/expression: %r' % fieldname)
                      fields.add(fieldname)
                  if conversion and conversion not in 'rsa':
                      raise ValueError('invalid conversion: %r' % conversion)
                  if spec and not self.fmt_spec.match(spec):
                      raise ValueError('bad specifier: %r' % spec)
          except ValueError as e:
              raise ValueError('invalid format: %s' % e)
          if not fields:
              raise ValueError('invalid format: no fields')
function_tokens: def validate ( self ) : fields = set ( ) try : for _ , fieldname , spec , conversion in _str_formatter . parse ( self . _fmt ) : if fieldname : if not self . field_spec . match ( fieldname ) : raise ValueError ( 'invalid field name/expression: %r' % fieldname ) fields . add ( fieldname ) if conversion and conversion not in 'rsa' : raise ValueError ( 'invalid conversion: %r' % conversion ) if spec and not self . fmt_spec . match ( spec ) : raise ValueError ( 'bad specifier: %r' % spec ) except ValueError as e : raise ValueError ( 'invalid format: %s' % e ) if not fields : raise ValueError ( 'invalid format: no fields' )