# dictionary is a collection of key-value pairs
d1 = { "John": 25, "Alice": 23}
d2 = {}
d3 = { "John": ["111-2233","222-1234"],
       "Alice": ["234-2233"]}

d3["John"]

['111-2233', '222-1234']

d3["John"][0]

'111-2233'

d1

{'John': 25, 'Alice': 23}

d1["Raj"] = 65

d1

{'John': 25, 'Alice': 23, 'Raj': 65}

del d1["Raj"]

d1

{'John': 25, 'Alice': 23}

"Raj" in d1

False

"John" not in d1

False

list(d1.keys())

['John', 'Alice']

wins = {}
teams = ["CHC","ATL"]

for t in teams:
    wins[t] = 0

print(wins)

{'CHC': 0, 'ATL': 0}

wins["CHC"] = wins["CHC"] + 1

wins

{'CHC': 1, 'ATL': 0}