Stopgaps#

exception sage.misc.stopgap.StopgapWarning[source]#

Bases: Warning

This class is used to warn users of a known issue that may produce mathematically incorrect results.

sage.misc.stopgap.set_state(mode)[source]#

Enable or disable the stopgap warnings.

INPUT:

  • mode – (bool); if True, enable stopgaps; otherwise, disable.

EXAMPLES:

sage: import sage.misc.stopgap
sage: sage.misc.stopgap.set_state(False)
sage: sage.misc.stopgap.stopgap("Displays nothing.", 12345)
sage: sage.misc.stopgap.set_state(True)
sage: sage.misc.stopgap.stopgap("Displays something.", 123456)
doctest:...:
...StopgapWarning: Displays something.
This issue is being tracked at https://github.com/sagemath/sage/issues/123456.
sage: sage.misc.stopgap.set_state(False)

>>> from sage.all import *
>>> import sage.misc.stopgap
>>> sage.misc.stopgap.set_state(False)
>>> sage.misc.stopgap.stopgap("Displays nothing.", Integer(12345))
>>> sage.misc.stopgap.set_state(True)
>>> sage.misc.stopgap.stopgap("Displays something.", Integer(123456))
doctest:...:
...StopgapWarning: Displays something.
This issue is being tracked at https://github.com/sagemath/sage/issues/123456.
>>> sage.misc.stopgap.set_state(False)
sage.misc.stopgap.stopgap(message, issue_no)[source]#

Issue a stopgap warning.

INPUT:

  • message – an explanation of how an incorrect answer might be produced.

  • issue_no – an integer, giving the number of the Github issue tracking the underlying issue.

EXAMPLES:

sage: import sage.misc.stopgap
sage: sage.misc.stopgap.set_state(True)
sage: sage.misc.stopgap.stopgap("Computation of heights on elliptic curves over number fields can return very imprecise results.", 12509)
doctest:...
...StopgapWarning: Computation of heights on elliptic curves over number fields can return very imprecise results.
This issue is being tracked at https://github.com/sagemath/sage/issues/12509.
sage: sage.misc.stopgap.stopgap("This is not printed", 12509)
sage: sage.misc.stopgap.set_state(False)  # so rest of doctesting fine

>>> from sage.all import *
>>> import sage.misc.stopgap
>>> sage.misc.stopgap.set_state(True)
>>> sage.misc.stopgap.stopgap("Computation of heights on elliptic curves over number fields can return very imprecise results.", Integer(12509))
doctest:...
...StopgapWarning: Computation of heights on elliptic curves over number fields can return very imprecise results.
This issue is being tracked at https://github.com/sagemath/sage/issues/12509.
>>> sage.misc.stopgap.stopgap("This is not printed", Integer(12509))
>>> sage.misc.stopgap.set_state(False)  # so rest of doctesting fine