Source code for memote.experimental.checks
# -*- coding: utf-8 -*-
# Copyright 2017 Novo Nordisk Foundation Center for Biosustainability,
# Technical University of Denmark.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Custom checks for `goodtables`."""
from __future__ import absolute_import
from goodtables import Error, check
@check("unknown-identifier", type="custom", context="body")
[docs]class UnknownIdentifier:
"""
Validate data identifiers against a known set.
Attributes
----------
column : str
The header of the data column to check.
identifiers : iterable of str
The known set of identifiers.
"""
def __init__(self, column, identifiers, **_):
"""
Initialize the custom identfier check.
Parameters
----------
column : str
The header of the data column to check.
identifiers : iterable of str
The known set of identifiers.
"""
self.column = column
self.identifiers = frozenset(identifiers)
[docs] def check_row(self, cells):
"""Check each row in the data table."""
cell = None
for item in cells:
if item["header"] == self.column:
cell = item
break
if cell is None:
error = Error(
"unknown-identifier",
row_number=cells[0]["row-number"],
message="Checking identifiers requires the column "
"'{column}' to exist.".format(column=self.column),
)
return [error]
value = cell.get("value")
if value not in self.identifiers:
error = Error(
"unknown-identifier",
cell,
message="Value '{value}' in column {header} on row "
"{row_number} is an unknown identifier.",
message_substitutions={"value": value},
)
return [error]