Basisprincipes van dictionaries

d = {'name': 'Alice', 'age': 30}
print(d)

d = {'name': 'Alice'}
print(d['name'])
print(d.get('missing', 'default'))

d = {'name': 'Alice'}
d['age'] = 30
print(d)

d = {'a': 1, 'b': 2}
del d['a']
print(d)

d = {'name': 'Alice'}
print('name' in d)
print('age' in d)

d = {'a': 1, 'b': 2}
for key in d:
    print(key, d[key])

d = {'a': 1, 'b': 2}
for k, v in d.items():
    print(f'{k}: {v}')

user = {'name': 'Alice', 'address': {'city': 'NYC'}}
print(user['address']['city'])

keys = ['a', 'b', 'c']
vals = [1, 2, 3]
d = dict(zip(keys, vals))
print(d)

text = 'hello'
counts = {}
for ch in text:
    counts[ch] = counts.get(ch, 0) + 1
print(counts)