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"""
.. codeauthor:: Tsuyoshi Hombashi <tsuyoshi.hombashi@gmail.com>
"""
import re
from typing import Any, Optional, Type
from ._const import StrictLevel
from .type import AbstractType, Integer, NullString, RealNumber, String
def is_hex(value: Any) -> bool:
try:
int(value, 16)
except (TypeError, ValueError):
return False
return True
def is_null_string(value: Any) -> bool:
return NullString(value, strict_level=StrictLevel.MIN).is_type()
def is_not_null_string(value: Any) -> bool:
return String(value, strict_level=StrictLevel.MAX).is_type()
def is_empty_sequence(value: Any) -> bool:
try:
return value is None or len(value) == 0
except TypeError:
return False
def is_not_empty_sequence(value: Any) -> bool:
try:
return len(value) > 0
except TypeError:
return False
def extract_typepy_from_dtype(dtype) -> Optional[Type[AbstractType]]:
dtype = str(dtype)
if re.search("^float", dtype):
return RealNumber
if re.search("^int", dtype):
return Integer
return None
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