80 lines
1.9 KiB
Python
80 lines
1.9 KiB
Python
"""Common utility functions"""
|
|
|
|
from types import NoneType
|
|
from typing import Dict, Optional, Type, Union, get_args, get_origin, TypeVar
|
|
|
|
T = TypeVar("T")
|
|
|
|
|
|
def unwrap(wrapped: Optional[T], default: T = None) -> T:
|
|
"""Unwrap function for Optionals."""
|
|
if wrapped is None:
|
|
return default
|
|
|
|
return wrapped
|
|
|
|
|
|
def coalesce(*args):
|
|
"""Coalesce function for multiple unwraps."""
|
|
return next((arg for arg in args if arg is not None), None)
|
|
|
|
|
|
def prune_dict(input_dict: Dict) -> Dict:
|
|
"""Trim out instances of None from a dictionary."""
|
|
|
|
return {k: v for k, v in input_dict.items() if v is not None}
|
|
|
|
|
|
def merge_dict(dict1: Dict, dict2: Dict) -> Dict:
|
|
"""Merge 2 dictionaries"""
|
|
for key, value in dict2.items():
|
|
if isinstance(value, dict) and key in dict1 and isinstance(dict1[key], dict):
|
|
merge_dict(dict1[key], value)
|
|
else:
|
|
dict1[key] = value
|
|
return dict1
|
|
|
|
|
|
def merge_dicts(*dicts: Dict) -> Dict:
|
|
"""Merge an arbitrary amount of dictionaries"""
|
|
result = {}
|
|
for dictionary in dicts:
|
|
result = merge_dict(result, dictionary)
|
|
|
|
return result
|
|
|
|
|
|
def flat_map(input_list):
|
|
"""Flattens a list of lists into a single list."""
|
|
|
|
return [item for sublist in input_list for item in sublist]
|
|
|
|
|
|
def is_list_type(type_hint) -> bool:
|
|
"""Checks if a type contains a list."""
|
|
|
|
if get_origin(type_hint) is list:
|
|
return True
|
|
|
|
# Recursively check for lists inside type arguments
|
|
type_args = get_args(type_hint)
|
|
if type_args:
|
|
return any(is_list_type(arg) for arg in type_args)
|
|
|
|
return False
|
|
|
|
|
|
def unwrap_optional_type(type_hint) -> Type:
|
|
"""
|
|
Unwrap Optional[type] annotations.
|
|
This is not the same as unwrap.
|
|
"""
|
|
|
|
if get_origin(type_hint) is Union:
|
|
args = get_args(type_hint)
|
|
if NoneType in args:
|
|
for arg in args:
|
|
if arg is not NoneType:
|
|
return arg
|
|
|
|
return type_hint
|