Exceptions¶
This module defines Sage-specific exceptions.
-
exception
sage.misc.exceptions.
OptionalPackageNotFoundError
¶ Bases:
exceptions.RuntimeError
This class defines the exception that should be raised when a function, method, or class cannot detect an optional package that it depends on. When an
OptionalPackageNotFoundError
is raised, this means one of the following:- The required optional package is not installed.
- The required optional package is installed, but the relevant interface to that package is unable to detect the package.
EXAMPLES:
sage: from sage.misc.exceptions import OptionalPackageNotFoundError sage: def find_package(fav_package): ... try: ... raise OptionalPackageNotFoundError("Unable to detect optional package: %s" % fav_package) ... except OptionalPackageNotFoundError: ... raise ... sage: find_package("ham and spam") Traceback (most recent call last): ... OptionalPackageNotFoundError: Unable to detect optional package: ham and spam