The only requirement there is openpyxl. Install it like this:

    pip3 install openpyxl

schedule_1.py

The script generate the random schedule (excel file) for hardcoded number of employees, period of time (it could be number of days in month or week for example)
and number of employees which are should be there each day. The maximum number of days the employee should work per period of the time is negligible

schedule_2.py

The script generate the random schedule (excel file) for hardcoded number of employees, period of time
and number of employees which are should be there each day. The maximum number of days the employee should work per period of the time is taken into account in this case.

As the schedule is randomly generated, it is recommended to perform some manual editing of the resulting Excel file.