Python utility decorator and context manager for swapping exceptions
Project description
swap-exceptions
Python utility decorator and context manager for swapping exceptions.
Basic Usage
As a decorator:
from swap_exceptions import swap_exceptions
@swap_exceptions({KeyError: ValueError("Incorrect value")})
def get_value(key: str):
d = {'a': 1, 'b': 2}
return d[key]
get_value('c') # ValueError: Incorrect value
Or as a context manager:
from swap_exceptions import swap_exceptions
def get_value(key: str):
d = {'a': 1, 'b': 2}
with swap_exceptions({KeyError: ValueError("Incorrect value")}):
return d[key]
get_value('c') # ValueError: Incorrect value
Advanced Usage
Mapping key can also be a tuple:
from swap_exceptions import swap_exceptions
@swap_exceptions({(KeyError, TypeError): ValueError("Incorrect value")})
def get_value(key: str):
d = {'a': 1, 'b': 2, 'c': 'not a number'}
return d[key] + 10
get_value('c') # ValueError: Incorrect value
Mapping value can also be a factory that generates the exception:
from swap_exceptions import swap_exceptions
@swap_exceptions({KeyError: lambda e: ValueError(f"Incorrect value {e.args[0]}")})
def get_value(key: str):
d = {'a': 1, 'b': 2}
return d[key]
get_value('c') # ValueError: Incorrect value c
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