container_app_conf/entry/float.py
# Copyright (c) 2019 Markus Ressel
# .
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# furnished to do so, subject to the following conditions:
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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from py_range_parse import Range
from container_app_conf import ConfigEntry
class FloatConfigEntry(ConfigEntry):
_example = "3.1415926535"
def __init__(self, key_path: [str], example: any = None, description: str or None = None, default: any = None,
required: bool = None, secret: bool = None, range: Range = None):
self.range = range
super().__init__(key_path, example, description, default, required, secret)
def _value_to_type(self, value: any) -> float or None:
"""
Tries to permissively convert the given value to a float.
:param value: the value to parse
:return: the parsed float value
"""
if isinstance(value, str) and '%' == value[-1]:
parsed_value = float(value[:-1]) / 100.0
else:
parsed_value = float(value)
if self.range is not None and parsed_value not in self.range:
raise ValueError("Value not in range: {} not in {}".format(parsed_value, self.range))
return parsed_value
def _type_to_value(self, type: any) -> any:
if type is None:
return None
return float(type)