Evaluating shell scripts

class sage.misc.sh.Sh[source]

Bases: object

Evaluates a shell script and returns the output.

To use this from the notebook type sh at the beginning of the input cell. The working directory is then the (usually temporary) directory where the Sage worksheet process is executing.

eval(code, globals=None, locals=None)[source]

This is difficult to test because the output goes to the screen rather than being captured by the doctest program, so the following really only tests that the command doesn’t bomb, not that it gives the right output:

sage: sh.eval('''echo "Hello there"\nif [ $? -eq 0 ]; then\necho "good"\nfi''') # random output

>>> from sage.all import *
>>> sh.eval('''echo "Hello there"\nif [ $? -eq 0 ]; then\necho "good"\nfi''') # random output

sh.eval('''echo "Hello there"\nif [ $? -eq 0 ]; then\necho "good"\nfi''') # random output