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"""Contain logic for checking average files"""
import re
from typing import Union
from .errors import InvalidValue
from .errors import InvalidCellValue
def valid_value(val):
"""Checks whether `val` is a valid value for averages"""
if re.search(r"^[0-9]+\.[0-9]{3}$", val):
return float(val)
raise InvalidCellValue(
f"Invalid value '{val}'. "
"Expected string representing a number with exactly three decimal "
"places.")
def invalid_value(line_number: int, column_number: int, val: str) -> Union[
InvalidValue, None]:
if re.search(r"^[0-9]+\.[0-9]{3}$", val):
return None
return InvalidValue(
line_number, column_number, val, (
f"Invalid value '{val}'. "
"Expected string representing a number with exactly three decimal "
"places."))
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