[C]增加了字典的使用

Author: VincentJ

chapter5/List.py

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+# python中的列表对应Java中的数组，字典对应的是集合（Map）
+# 是结构相同的组成的一个整体
+# 获取--R
+alien_0 = {'color': 'Green', 'point': 5}
+print(alien_0['color'])
+print(alien_0['point'])
+
+# 添加--C
+alien_0['x_position'] = 100
+alien_0['y_position'] = 200
+print(alien_0)
+
+# 修改--U
+alien_0['color'] = 'Red'
+print(alien_0)
+
+# 删除--D
+del alien_0['y_position']
+print(alien_0)
+
+# 遍历字典
+students = {'Tom': 'Java', 'Lily': 'C++', 'John': 'Kotlin', 'Jack': 'Swift'}
+for name, language in students.items():
+    print(name + ' like ' + language)
+
+# 只获取key或者value
+print('只获取key')
+for name in students.keys():
+    print(name)
+
+print('只获取value')
+for language in students.values():
+    print(language)
+
+# 类似的，内部是无序的，现在要求按特定的顺序返回
+print('按字母顺序返回key或者value')
+for name in sorted(students.values()):
+    print(name)
+
+print('按key的排序返回value')
+for name in sorted(students):
+    print(name + ' like ' + students[name])
+
+# 嵌套
+worker = {'worker1': 'worker1', 'worker2': 'worker2'}
+farmer = {'farmer1': 'farmer', 'farmer2': 'farmer2'}
+teacher = {'teacher1': 'teacher1', 'teacher2': 'teacher2'}
+
+persons = [worker, farmer, students]
+for person in persons:
+    print(person)
+
+# 在字典中存储列表
+data = {'code': 404, 'result': ['lily', 'tom']}
+for name in data['result']:
+    print(name.title())
+
+favorite_languages = {
+    'jen': ['python', 'ruby'],
+    'sarah': ['c'],
+    'edward': ['ruby', 'go'],
+    'phil': ['python', 'haskell'],
+}
+
+for name, languages in favorite_languages.items():
+    print('\n' + name + "'s favorite languages are:")
+    for language in languages:
+        print('\t' + language)
+
+# 字典中存储字典
+
+users = {
+    'aeinstein': {
+        'first': 'albert',
+        'last': 'einstein',
+        'location': 'princeton',
+    },
+    'mcurie': {
+        'first': 'marie',
+        'last': 'curie',
+        'location': 'paris',
+    },
+}
+
+for user_name, user_info in users.items():
+    print('\nUseName:' + user_name + '\r')
+    fullName = user_info['first'] + user_info['last']
+    address = user_info['location']
+    print('Full Name:' + fullName.title() + '\r\n' + 'Address:' + address)