parameters: (wire_type, format)
return_statement: return SpecificEncoder
docstring: Return a constructor for an encoder for a fixed-width field.
  
    Args:
        wire_type:  The field's wire type, for encoding tags.
        format:  The format string to pass to struct.pack().
docstring_summary: Return a constructor for an encoder for a fixed-width field.
docstring_tokens: Return a constructor for an encoder for a fixed - width field .
function: def _StructPackEncoder(wire_type, format):
    """Return a constructor for an encoder for a fixed-width field.
  
    Args:
        wire_type:  The field's wire type, for encoding tags.
        format:  The format string to pass to struct.pack().
    """
  
    value_size = struct.calcsize(format)
  
    def SpecificEncoder(field_number, is_repeated, is_packed):
      local_struct_pack = struct.pack
      if is_packed:
        tag_bytes = TagBytes(field_number, wire_format.WIRETYPE_LENGTH_DELIMITED)
        local_EncodeVarint = _EncodeVarint
        def EncodePackedField(write, value):
          write(tag_bytes)
          local_EncodeVarint(write, len(value) * value_size)
          for element in value:
            write(local_struct_pack(format, element))
        return EncodePackedField
      elif is_repeated:
        tag_bytes = TagBytes(field_number, wire_type)
        def EncodeRepeatedField(write, value):
          for element in value:
            write(tag_bytes)
            write(local_struct_pack(format, element))
        return EncodeRepeatedField
      else:
        tag_bytes = TagBytes(field_number, wire_type)
        def EncodeField(write, value):
          write(tag_bytes)
          return write(local_struct_pack(format, value))
        return EncodeField
  
    return SpecificEncoder
function_tokens: def _StructPackEncoder ( wire_type , format ) : value_size = struct . calcsize ( format ) def SpecificEncoder ( field_number , is_repeated , is_packed ) : local_struct_pack = struct . pack if is_packed : tag_bytes = TagBytes ( field_number , wire_format . WIRETYPE_LENGTH_DELIMITED ) local_EncodeVarint = _EncodeVarint def EncodePackedField ( write , value ) : write ( tag_bytes ) local_EncodeVarint ( write , len ( value ) * value_size ) for element in value : write ( local_struct_pack ( format , element ) ) return EncodePackedField elif is_repeated : tag_bytes = TagBytes ( field_number , wire_type ) def EncodeRepeatedField ( write , value ) : for element in value : write ( tag_bytes ) write ( local_struct_pack ( format , element ) ) return EncodeRepeatedField else : tag_bytes = TagBytes ( field_number , wire_type ) def EncodeField ( write , value ) : write ( tag_bytes ) return write ( local_struct_pack ( format , value ) ) return EncodeField return SpecificEncoder