After students have submitted their assignments, the instructor can view what has been submitted with nbgrader list --inbound:
In [ ]:
%%bash
nbgrader list --inbound
The instructor can then collect all submitted assignments with nbgrader collect and passing the name of the assignment:
In [ ]:
%%bash
nbgrader collect "Problem Set 1"
This will copy the student submissions to the submitted folder in a way that is automatically compatible with nbgrader autograde:
In [ ]:
%%bash
ls -l submitted