A microlibrary for handling exceptions.
Example:
from try_default import try_default
foo = []
result = try_default(lambda: foo[0], {IndexError: 'n/a'})
# result: 'n/a'
foo = ['spam']
result = try_default(lambda: foo[0], {IndexError: 'n/a'})
# result: 'spam'
bar = {'egg': foo[0]}
result = try_default(lambda: bar['spam'], {IndexError: 'n/a'})
# Raises KeyError1 maintainer
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