L = ['precalc', 'AP biology', 'Chem Honors', 'Global 2', 'Spanish 3', 'English', 'Health', 'Gym', 'AP bio lab', 'Band']
D = {}
# D = {'name': 'Bob', 'age': 40}
# E = {'cto': {'name': 'Bob', 'age': 40}}
# D = dict(name='Bob', age=40)
# D = dict([('name', 'Bob'), ('age', 40)])
# D = dict(zip(keyslist, valueslist))
# D = dict.fromkeys(['name', 'age'])
# D['name']
# E['cto']['age']
# 'age' in D
# D.keys()
# D.values()
# D.items()
# D.copy()
# D.clear()
# D.update(D2)
# D.get(key, default?)
# D.pop(key, default?)
# D.setdefault(key, default?)
# D.popitem()
# len(D)
# D[key] = 42
# del D[key]
# list(D.keys())
# D1.keys() & D2.keys()
# D = {x: x*2 for x in range(10)}
