Gets SECCOM's Sympla check-ins and validates attendances for UFSC's students.
Convert xlsx attendances into csv:
$ python -m attor convert attendances.xlsx attendances.csv
Fetch members from a class:
$ python -m attor fetch_members INE5417 04208A 20192 ./
$ python -m attor fetch_members INE5413 04208 20192 ./
$ tree .
.
└── 20192
├── INE5413
│ └── 04208.csv
└── INE5417
└── 04208A.csv
Filter for those who is in both CSVs at the same time
$ python -m attor filter attendances.csv class_members.csv filtered.csv