user must have a version of python installed
before usage, please install python package requirements by typing into the terminal
    $ pip install -r requirements.txtrun the script with space separated list of the requested subject courses as written in the schedule, example:
    $ py exams.py -c "CSE225 CSE325"this outputs an image and an excel file of the schedule
The file temp1.xlsx acts as a template for the output, you may change its appearance as you like.
possible ways of improvement (feel free to contribute):
- read from pdf the text content. See stackoverflow