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Running
on
Zero
File size: 2,104 Bytes
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import os
from typing import Any, Callable, List, Optional, Type, TypeVar, Union
from inference.core.exceptions import InvalidEnvironmentVariableError
T = TypeVar("T")
def safe_env_to_type(
variable_name: str,
default_value: Optional[T] = None,
type_constructor: Optional[Union[Type[T], Callable[[str], T]]] = None,
) -> Optional[T]:
"""
Converts env variable to specified type, but only if variable is set - otherwise default is returned.
If `type_constructor` is not given - value of type str will be returned.
"""
if variable_name not in os.environ:
return default_value
variable_value = os.environ[variable_name]
if type_constructor is None:
return variable_value
return type_constructor(variable_value)
def str2bool(value: Any) -> bool:
"""
Converts an environment variable to a boolean value.
Args:
value (str or bool): The environment variable value to be converted.
Returns:
bool: The converted boolean value.
Raises:
InvalidEnvironmentVariableError: If the value is not 'true', 'false', or a boolean.
"""
if isinstance(value, bool):
return value
if not issubclass(type(value), str):
raise InvalidEnvironmentVariableError(
f"Expected a boolean environment variable (true or false) but got '{value}'"
)
if value.lower() == "true":
return True
elif value.lower() == "false":
return False
else:
raise InvalidEnvironmentVariableError(
f"Expected a boolean environment variable (true or false) but got '{value}'"
)
def safe_split_value(value: Optional[str], delimiter: str = ",") -> Optional[List[str]]:
"""
Splits a separated environment variable into a list.
Args:
value (str): The environment variable value to be split.
delimiter(str): Delimiter to be used
Returns:
list or None: The split values as a list, or None if the input is None.
"""
if value is None:
return None
else:
return value.split(delimiter)
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