Merge branch 'main' of git.doit.wisc.edu:cdis/cs/courses/cs220/cs220-lecture-material

...lec_notes/lec17_Oct17_Dictionaries1/amfam_survey_data.csv

...7_Oct17_Dictionaries1/lec17_dictionaries1_completed.ipynb

...17_Oct17_Dictionaries1/lec17_dictionaries1_template.ipynb

f22/andy_lec_notes/lec17_Oct17_Dictionaries1/readme.md

..._checkpoints/lec17_dictionaries_template-checkpoint.ipynb

f22/andy_lec_notes/lec_17/cs220_survey_data.csv

f22/andy_lec_notes/lec_17/lec17_dictionaries_850.ipynb