def _validate_iterable(iterable_type, value):
"""Convert the iterable to iterable_type, or raise a Configuration
exception.
"""
if isinstance(value, six.string_types):
msg = "Invalid iterable of type(%s): %s"
raise ValidationError(msg % (tuple(value), value))
try:
return iterable_type(value)
except TypeError:
raise ValidationError("Invalid iterable: %s" % (value))
def validate_log_level(value):
"""Validate a log level from a string value. Returns a constant from
the :mod:`logging` module.
"""
try:
return getattr(logging, value)
except AttributeError:
raise ValidationError("Unknown log level: %s" % value)
def validate_time(value):
if isinstance(value, datetime.time):
return value
for format_ in time_formats:
try:
return datetime.time(*time.strptime(value, format_)[3:6])
except ValueError:
pass
raise ValidationError("Invalid time format: %s" % value)
def validate_datetime(value):
if isinstance(value, datetime.datetime):
return value
for format in date_formats:
try:
return datetime.datetime.strptime(value, format)
except ValueError:
pass
raise ValidationError("Invalid date format: %s" % value)
def validate_numeric(type_func, value):
try:
return type_func(value)
except ValueError:
raise ValidationError("Invalid %s: %s" % (type_func.__name__, value))
def validate_regex(value):
try:
return re.compile(value)
except (re.error, TypeError) as e:
raise ValidationError("Invalid regex: %s, %s" % (e, value))