A safe get by key function with the default parameter (decorators in python)

get.py

from safe import safe

def get(default=None):
    '''Return a function f(struct, key) to obtain the value
    struct[key] or default if key is out of range.
    '''
    return safe(default)(lambda struct, key: struct[key])

main.py

'''Test the get function'''
from get import get

struct = [10, 20, 30]
key = len(struct) + 1
default = 'BLOB'

print('Testing of the safe get function.')
print('struct =', repr(struct))
print('invalid key is', key)
print('defaul =', repr(default))
print('struct[key] =', repr(get(default)(struct, key)))
try:
    assert get(default)(struct, key) == default
except AssertionError:
    print('ERROR: got {!r} while expected {!r}'.format(
          get(default)(struct, key), default))
else:
    print('Test passed: the expected default value is obtained.')

safe.py

def safe(default=None):
    '''Decorator to handle runtime errors
    Return the default value when an error occurred'''

    def proxy(func):
        from functools import wraps

        @wraps(func)
        def wrapped(*args, **kwargs):
            try:
                return func(*args, **kwargs)
            except Exception:
                return default

        return wrapped

    return proxy