def _spark(cls, column, **kwargs):
def is_ascii(val):
return str(val).isascii()
is_ascii_udf = F.udf(is_ascii, sparktypes.BooleanType())
return is_ascii_udf(column)
def _spark(cls, column, strftime_format, **kwargs):
# Below is a simple validation that the provided format can both format and parse a datetime object.
# %D is an example of a format that can format but not parse, e.g.
try:
datetime.strptime(
datetime.strftime(datetime.now(), strftime_format),
strftime_format)
except ValueError as e:
raise ValueError(
f"Unable to use provided strftime_format: {str(e)}")
def is_parseable_by_format(val):
if val is None:
return False
try:
datetime.strptime(val, strftime_format)
return True
except TypeError:
raise TypeError(
"Values passed to expect_column_values_to_match_strftime_format must be of type string.\nIf you want to validate a column of dates or timestamps, please call the expectation before converting from string format."
)
except ValueError:
return False
success_udf = F.udf(is_parseable_by_format, sparktypes.BooleanType())
return success_udf(column)
def _spark(cls, column, **kwargs):
def is_xml(val):
try:
xml_doc = etree.fromstring(val)
return True
except:
return False
is_xml_udf = F.udf(is_xml, sparktypes.BooleanType())
return is_xml_udf(column)
def _spark(cls, column, json_schema, **kwargs):
def is_json(val):
try:
json.loads(val)
return True
except:
return False
is_json_udf = F.udf(is_json, sparktypes.BooleanType())
return is_json_udf(column)
def _spark(cls, column, json_schema, **kwargs):
def matches_json_schema(val):
if val is None:
return False
try:
val_json = json.loads(val)
jsonschema.validate(val_json, json_schema)
# jsonschema.validate raises an error if validation fails.
# So if we make it this far, we know that the validation succeeded.
return True
except jsonschema.ValidationError:
return False
except jsonschema.SchemaError:
raise
except:
raise
matches_json_schema_udf = F.udf(matches_json_schema, sparktypes.BooleanType())
return matches_json_schema_udf(column)
def _spark(cls, column, xml_schema, **kwargs):
try:
xmlschema_doc = etree.fromstring(xml_schema)
xmlschema = etree.XMLSchema(xmlschema_doc)
except etree.ParseError:
raise
except:
raise
def matches_xml_schema(val):
if val is None:
return False
try:
xml_doc = etree.fromstring(val)
return xmlschema(xml_doc)
except:
raise
matches_xml_schema_udf = F.udf(matches_xml_schema,
sparktypes.BooleanType())
return matches_xml_schema_udf(column)
def _spark(cls, column, **kwargs):
tz_udf = F.udf(is_valid_timezone, sparktypes.BooleanType())
return tz_udf(column)
