| examples, globs, name, filename, lineno, docstring) | 
DocTest defines the following member variables. They are initialized by the constructor, and should not be modified directly.
None if the filename is unknown, or if the
    DocTest was not extracted from a file.
None if the line number is
    unavailable.  This line number is zero-based with respect to the
    beginning of the file.
See About this document... for information on suggesting changes.