字典可以被看作是一個無序的鍵 : 值對。 一對大括號用於創建一個空的字典: {}. 每個元素可以映射到一個特定的值。整數或字符串可以用來作索引。字典冇有順序。讓我們用一個例子作一個簡單的解釋：
#!/usr/bin/python
words = {}
words["Hello"] = "Bonjour"
words["Yes"] = "Oui"
words["No"] = "Non"
words["Bye"] = "Au Revoir"
print words["Hello"]
print words["No"]
輸出:
Bonjour Non
我們並不局限於在值部分來用單詞的定義。一個演示：
#!/usr/bin/python
dict = {}
dict['Ford'] = "Car"
dict['Python'] = "The Python Programming Language"
dict[2] = "This sentence is stored here."
print dict['Ford']
print dict['Python']
print dict[2]
輸出:
Car The Python Programming Language This sentence is stored here.
操作字典
我們可以在字典聲明之後操作存儲在其中的數據。這顯示在下麵的例子：
#!/usr/bin/python
words = {}
words["Hello"] = "Bonjour"
words["Yes"] = "Oui"
words["No"] = "Non"
words["Bye"] = "Au Revoir"
print words # print key-pairs.
del words["Yes"] # delete a key-pair.
print words # print key-pairs.
words["Yes"] = "Oui!" # add new key-pair.
print words # print key-pairs.
輸出：
{'Yes': 'Oui', 'Bye': 'Au Revoir', 'Hello': 'Bonjour', 'No': 'Non'}
{'Bye': 'Au Revoir', 'Hello': 'Bonjour', 'No': 'Non'}
{'Yes': 'Oui!', 'Bye': 'Au Revoir', 'Hello': 'Bonjour', 'No': 'Non'}
