<\/span><\/h2>\n\n\n\n\u9996\u5148\uff0c\u6211\u4eec\u6765\u770b\u770b\u5982\u4f55\u521b\u5efa\u4e00\u4e2a\u5b57\u5178\u3002<\/p>\n\n\n\n
# \u65b9\u6cd51\uff1a\u4f7f\u7528\u82b1\u62ec\u53f7\u521b\u5efa\u5b57\u5178<\/em>
my_dict = {'name': 'Alice', 'age': 25, 'city': 'New York'}
# \u65b9\u6cd52\uff1a\u4f7f\u7528dict()\u51fd\u6570\u521b\u5efa\u5b57\u5178<\/em>
my_dict = dict(name='Alice', age=25, city='New York')
# \u65b9\u6cd53\uff1a\u4f7f\u7528\u5217\u8868\u63a8\u5bfc\u5f0f\u521b\u5efa\u5b57\u5178<\/em>
my_dict = {key: value for key, value in [('name', 'Alice'), ('age', 25), ('city', 'New York')]}<\/code><\/pre>\n\n\n\n<\/span>2. \u8bbf\u95ee\u5b57\u5178\u4e2d\u7684\u503c<\/strong><\/span><\/h2>\n\n\n\n\u8bbf\u95ee\u5b57\u5178\u4e2d\u7684\u503c\u975e\u5e38\u7b80\u5355\uff0c\u53ea\u9700\u8981\u4f7f\u7528\u952e\u5373\u53ef\u3002<\/p>\n\n\n\n
# \u65b9\u6cd51\uff1a\u4f7f\u7528\u65b9\u62ec\u53f7\u8bbf\u95ee\u503c<\/em>
name = my_dict['name']
print(name) # \u8f93\u51fa: Alice<\/em>
# \u65b9\u6cd52\uff1a\u4f7f\u7528get()\u65b9\u6cd5\u8bbf\u95ee\u503c<\/em>
age = my_dict.get('age')
print(age) # \u8f93\u51fa: 25<\/em><\/code><\/pre>\n\n\n\n<\/span>3. \u66f4\u65b0\u5b57\u5178\u4e2d\u7684\u503c<\/strong><\/span><\/h2>\n\n\n\n\u66f4\u65b0\u5b57\u5178\u4e2d\u7684\u503c\u4e5f\u5f88\u76f4\u89c2\uff0c\u76f4\u63a5\u8d4b\u503c\u5373\u53ef\u3002<\/p>\n\n\n\n
# \u65b9\u6cd51\uff1a\u4f7f\u7528\u65b9\u62ec\u53f7\u66f4\u65b0\u503c<\/em>
my_dict['age'] = 26
print(my_dict) # \u8f93\u51fa: {'name': 'Alice', 'age': 26, 'city': 'New York'}<\/em>
# \u65b9\u6cd52\uff1a\u4f7f\u7528update()\u65b9\u6cd5\u66f4\u65b0\u591a\u4e2a\u952e\u503c\u5bf9<\/em>
my_dict.update({'age': 27, 'city': 'San Francisco'})
print(my_dict) # \u8f93\u51fa: {'name': 'Alice', 'age': 27, 'city': 'San Francisco'}<\/em><\/code><\/pre>\n\n\n\n<\/span>4. \u6dfb\u52a0\u65b0\u7684\u952e\u503c\u5bf9<\/strong><\/span><\/h2>\n\n\n\n\u6dfb\u52a0\u65b0\u7684\u952e\u503c\u5bf9\u4e5f\u975e\u5e38\u7b80\u5355\uff0c\u76f4\u63a5\u8d4b\u503c\u5373\u53ef\u3002<\/p>\n\n\n\n
# \u65b9\u6cd51\uff1a\u76f4\u63a5\u8d4b\u503c\u6dfb\u52a0\u65b0\u7684\u952e\u503c\u5bf9<\/em>
my_dict['email'] = 'alice@example.com'
print(my_dict) # \u8f93\u51fa: {'name': 'Alice', 'age': 27, 'city': 'San Francisco', 'email': 'alice@example.com'}<\/em>
# \u65b9\u6cd52\uff1a\u4f7f\u7528update()\u65b9\u6cd5\u6dfb\u52a0\u591a\u4e2a\u952e\u503c\u5bf9<\/em>
my_dict.update({'phone': '123-456-7890', 'address': '123 Main St'})
print(my_dict) # \u8f93\u51fa: {'name': 'Alice', 'age': 27, 'city': 'San Francisco', 'email': 'alice@example.com', 'phone': '123-456-7890', 'address': '123 Main St'}<\/em><\/code><\/pre>\n\n\n\n<\/span>5. \u5220\u9664\u5b57\u5178\u4e2d\u7684\u952e\u503c\u5bf9<\/strong><\/span><\/h2>\n\n\n\n\u5220\u9664\u5b57\u5178\u4e2d\u7684\u952e\u503c\u5bf9\u6709\u591a\u79cd\u65b9\u6cd5\u3002<\/p>\n\n\n\n
# \u65b9\u6cd51\uff1a\u4f7f\u7528del\u8bed\u53e5\u5220\u9664\u952e\u503c\u5bf9<\/em>
del my_dict['phone']
print(my_dict) # \u8f93\u51fa: {'name': 'Alice', 'age': 27, 'city': 'San Francisco', 'email': 'alice@example.com', 'address': '123 Main St'}<\/em>
# \u65b9\u6cd52\uff1a\u4f7f\u7528pop()\u65b9\u6cd5\u5220\u9664\u952e\u503c\u5bf9\u5e76\u8fd4\u56de\u503c<\/em>
email = my_dict.pop('email')
print(email) # \u8f93\u51fa: alice@example.com<\/em>
print(my_dict) # \u8f93\u51fa: {'name': 'Alice', 'age': 27, 'city': 'San Francisco', 'address': '123 Main St'}<\/em>
# \u65b9\u6cd53\uff1a\u4f7f\u7528popitem()\u65b9\u6cd5\u5220\u9664\u5e76\u8fd4\u56de\u4efb\u610f\u4e00\u4e2a\u952e\u503c\u5bf9<\/em>
key, value = my_dict.popitem()
print(key, value) # \u8f93\u51fa: address 123 Main St<\/em>
print(my_dict) # \u8f93\u51fa: {'name': 'Alice', 'age': 27, 'city': 'San Francisco'}<\/em><\/code><\/pre>\n\n\n\n<\/span>6. \u68c0\u67e5\u952e\u662f\u5426\u5b58\u5728<\/strong><\/span><\/h2>\n\n\n\n\u68c0\u67e5\u5b57\u5178\u4e2d\u662f\u5426\u5305\u542b\u67d0\u4e2a\u952e\u6709\u591a\u79cd\u65b9\u6cd5\u3002<\/p>\n\n\n\n
# \u65b9\u6cd51\uff1a\u4f7f\u7528in\u5173\u952e\u5b57<\/em>
if 'name' in my_dict:
print('Name is in the dictionary')
# \u65b9\u6cd52\uff1a\u4f7f\u7528get()\u65b9\u6cd5<\/em>
if my_dict.get('age') is not None:
print('Age is in the dictionary')<\/code><\/pre>\n\n\n\n<\/span>7. \u83b7\u53d6\u5b57\u5178\u7684\u6240\u6709\u952e<\/strong><\/span><\/h2>\n\n\n\n\u83b7\u53d6\u5b57\u5178\u4e2d\u7684\u6240\u6709\u952e\u53ef\u4ee5\u4f7f\u7528keys()<\/code>\u65b9\u6cd5\u3002<\/p>\n\n\n\nkeys = my_dict.keys()
print(keys) # \u8f93\u51fa: dict_keys(['name', 'age', 'city'])<\/em><\/code><\/pre>\n\n\n\n<\/span>8. \u83b7\u53d6\u5b57\u5178\u7684\u6240\u6709\u503c<\/strong><\/span><\/h2>\n\n\n\n\u83b7\u53d6\u5b57\u5178\u4e2d\u7684\u6240\u6709\u503c\u53ef\u4ee5\u4f7f\u7528values()<\/code>\u65b9\u6cd5\u3002<\/p>\n\n\n\nvalues = my_dict.values()
print(values) # \u8f93\u51fa: dict_values(['Alice', 27, 'San Francisco'])<\/em><\/code><\/pre>\n\n\n\n<\/span>9. \u83b7\u53d6\u5b57\u5178\u7684\u6240\u6709\u952e\u503c\u5bf9<\/strong><\/span><\/h2>\n\n\n\n\u83b7\u53d6\u5b57\u5178\u4e2d\u7684\u6240\u6709\u952e\u503c\u5bf9\u53ef\u4ee5\u4f7f\u7528items()<\/code>\u65b9\u6cd5\u3002<\/p>\n\n\n\nitems = my_dict.items()
print(items) # \u8f93\u51fa: dict_items([('name', 'Alice'), ('age', 27), ('city', 'San Francisco')])<\/em><\/code><\/pre>\n\n\n\n<\/span>10. \u904d\u5386\u5b57\u5178<\/strong><\/span><\/h2>\n\n\n\n\u904d\u5386\u5b57\u5178\u6709\u591a\u79cd\u65b9\u5f0f\uff0c\u53ef\u4ee5\u6839\u636e\u9700\u8981\u9009\u62e9\u5408\u9002\u7684\u65b9\u6cd5\u3002<\/p>\n\n\n\n
# \u65b9\u6cd51\uff1a\u904d\u5386\u952e<\/em>
for key in my_dict:
print(key)
# \u65b9\u6cd52\uff1a\u904d\u5386\u503c<\/em>
for value in my_dict.values():
print(value)
# \u65b9\u6cd53\uff1a\u904d\u5386\u952e\u503c\u5bf9<\/em>
for key, value in my_dict.items():
print(f'{key}: {value}')<\/code><\/pre>\n\n\n\n<\/span>11. \u5b57\u5178\u7684\u6d45\u62f7\u8d1d<\/strong><\/span><\/h2>\n\n\n\n\u5b57\u5178\u7684\u6d45\u62f7\u8d1d\u53ef\u4ee5\u4f7f\u7528copy()<\/code>\u65b9\u6cd5\u3002<\/p>\n\n\n\n# \u65b9\u6cd51\uff1a\u4f7f\u7528copy()\u65b9\u6cd5<\/em>
new_dict = my_dict.copy()
print(new_dict) # \u8f93\u51fa: {'name': 'Alice', 'age': 27, 'city': 'San Francisco'}<\/em>
# \u65b9\u6cd52\uff1a\u4f7f\u7528\u5207\u7247\u64cd\u4f5c<\/em>
new_dict = dict(my_dict)
print(new_dict) # \u8f93\u51fa: {'name': 'Alice', 'age': 27, 'city': 'San Francisco'}<\/em><\/code><\/pre>\n\n\n\n<\/span>12. \u5b57\u5178\u7684\u6df1\u62f7\u8d1d<\/strong><\/span><\/h2>\n\n\n\n\u5b57\u5178\u7684\u6df1\u62f7\u8d1d\u53ef\u4ee5\u4f7f\u7528copy<\/code>\u6a21\u5757\u4e2d\u7684deepcopy()<\/code>\u65b9\u6cd5\u3002<\/p>\n\n\n\nimport copy
# \u4f7f\u7528deepcopy()\u65b9\u6cd5<\/em>
new_dict = copy.deepcopy(my_dict)
print(new_dict) # \u8f93\u51fa: {'name': 'Alice', 'age': 27, 'city': 'San Francisco'}<\/em><\/code><\/pre>\n\n\n\n<\/span>13. \u5408\u5e76\u4e24\u4e2a\u5b57\u5178<\/strong><\/span><\/h2>\n\n\n\n\u5408\u5e76\u4e24\u4e2a\u5b57\u5178\u53ef\u4ee5\u4f7f\u7528update()<\/code>\u65b9\u6cd5\u6216\u5b57\u5178\u89e3\u5305\u3002<\/p>\n\n\n\n# \u65b9\u6cd51\uff1a\u4f7f\u7528update()\u65b9\u6cd5<\/em>
dict1 = {'a': 1, 'b': 2}
dict2 = {'c': 3, 'd': 4}
dict1.update(dict2)
print(dict1) # \u8f93\u51fa: {'a': 1, 'b': 2, 'c': 3, 'd': 4}<\/em>
# \u65b9\u6cd52\uff1a\u4f7f\u7528\u5b57\u5178\u89e3\u5305<\/em>
dict1 = {'a': 1, 'b': 2}
dict2 = {'c': 3, 'd': 4}
merged_dict = {**dict1, **dict2}
print(merged_dict) # \u8f93\u51fa: {'a': 1, 'b': 2, 'c': 3, 'd': 4}<\/em><\/code><\/pre>\n\n\n\n<\/span>14. \u5b57\u5178\u6392\u5e8f<\/strong><\/span><\/h2>\n\n\n\n\u5b57\u5178\u672c\u8eab\u662f\u65e0\u5e8f\u7684\uff0c\u4f46\u53ef\u4ee5\u901a\u8fc7\u67d0\u4e9b\u65b9\u6cd5\u5bf9\u5176\u8fdb\u884c\u6392\u5e8f\u3002<\/p>\n\n\n\n
# \u65b9\u6cd51\uff1a\u6309\u952e\u6392\u5e8f<\/em>
sorted_dict = dict(sorted(my_dict.items()))
print(sorted_dict) # \u8f93\u51fa: {'age': 27, 'city': 'San Francisco', 'name': 'Alice'}<\/em>
# \u65b9\u6cd52\uff1a\u6309\u503c\u6392\u5e8f<\/em>
sorted_dict = dict(sorted(my_dict.items(), key=lambda item: item[1]))
print(sorted_dict) # \u8f93\u51fa: {'name': 'Alice', 'age': 27, 'city': 'San Francisco'}<\/em><\/code><\/pre>\n\n\n\n