def try_ex()

in src/lambda/meaningful-conversations-lex-lambda.py [0:0]


def try_ex(func):
    """
    Call passed in function in try block. If KeyError is encountered return None.
    This function is intended to be used to safely access dictionary.

    Note that this function would have negative impact on performance.
    """

    try:
        return func()
    except KeyError:
        return None