A class used to check the whether the actual output from a doctest
example matches the expected output. OutputChecker
defines two methods: check_output, which compares a given
pair of outputs, and returns true if they match; and
output_difference, which returns a string describing the
differences between two outputs.
New in version 2.4.
OutputChecker defines the following methods:
check_output(
want, got, optionflags)
Return True iff the actual output from an example
(got) matches the expected output (want). These
strings are always considered to match if they are identical; but
depending on what option flags the test runner is using, several
non-exact match types are also possible. See
section 23.2.3 for more information about option
flags.
output_difference(
example, got, optionflags)
Return a string describing the differences between the expected
output for a given example (example) and the actual output
(got). optionflags is the set of option flags used to
compare want and got.
