6.2 Dictionaries¶

A dictionary associates keys with values.
Each key maps to a specific value.
Sample dictionary keys and values:

Keys	Key type	Values	Value type
Country names	`str`	Internet country codes	`str`
Decimal numbers	`int`	Roman numerals	`str`
States	`str`	Agricultural products	list of `str`
Hospital patients	`str`	Vital signs	tuple of `int`s and `float`s
Baseball players	`str`	Batting averages	`float`
Metric measurements	`str`	Abbreviations	`str`
Inventory codes	`str`	Quantity in stock	`int`

Unique Keys¶

Keys must be immutable and unique.
Multiple keys can have the same value.

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