标签：rem 智能 人工 app 南京 函数 family size 重庆
cities = ["北京","上海",["深圳","广州"],"杭州"] jobs = [] jobs.append("人工智能") jobs.append("后端开发") jobs.append("前端开发") jobs.append("数据分析") print(cities) print(jobs)
打印输出结果：
[‘北京‘, ‘上海‘, [‘深圳‘, ‘广州‘], ‘杭州‘] [‘人工智能‘, ‘后端开发‘, ‘前端开发‘, ‘数据分析‘]
print(cities[0:-1:2])
打印输出结果：
[‘北京‘, [‘深圳‘, ‘广州‘]]
print(cities[::2])
打印输出结果：
[‘北京‘, [‘深圳‘, ‘广州‘]]
print(cities[:])
打印输出结果：
[‘北京‘, ‘上海‘, [‘深圳‘, ‘广州‘], ‘杭州‘]
向列表中插入数据。
cities = ["北京","上海",["深圳","广州"],"杭州"] cities.insert(1,"天津") print(cities)
打印输出结果：
[‘北京‘, ‘天津‘, ‘上海‘, [‘深圳‘, ‘广州‘], ‘杭州‘]
将一条数据从列表中移除。
cities = ["北京","上海",["深圳","广州"],"杭州"] cities.remove("上海") print(cities)
打印输出结果：
[‘北京‘, [‘深圳‘, ‘广州‘], ‘杭州‘]
cities = ["北京","上海",["深圳","广州"],"杭州"] del cities[1] print(cities)
打印输出结果：
[‘北京‘, [‘深圳‘, ‘广州‘], ‘杭州‘]
new_cities = ["武汉","成都","重庆","南京"] del new_cities print(new_cities)
打印输出结果：
NameError: name ‘new_cities‘ is not defined
用于移除列表中的一个元素（默认最后一个元素），并且返回该元素的值。
cities = ["北京","上海",["深圳","广州"],"杭州"] cities.pop(1) print(cities)
打印输出结果：
[‘北京‘, [‘深圳‘, ‘广州‘], ‘杭州‘]
用于从列表中找出某个值第一个匹配项的索引位置。
cities = ["北京","上海",["深圳","广州"],"杭州"] print(cities.index("杭州"))
打印输出结果：3
用于统计字符串里某个字符出现的次数。
cities = ["北京","上海",["深圳","广州"],"杭州"] cities.append("北京") cities.append("北京") print(cities)
打印输出结果：3
用于反向列表中元素。
cities = ["北京","上海",["深圳","广州"],"杭州"] cities.reverse() print(cities)
打印输出结果：
[‘杭州‘, [‘深圳‘, ‘广州‘], ‘上海‘, ‘北京‘]
用于对原列表进行排序，如果指定参数，则使用比较函数指定的比较函数。
list_r = ["A","B","C","x","a"]
# 降序
list_r.sort(reverse=True)
print(list_r)
# 升序
list_r.sort(reverse=False)
print(list_r)
打印输出结果：
[‘x‘, ‘a‘, ‘C‘, ‘B‘, ‘A‘] [‘A‘, ‘B‘, ‘C‘, ‘a‘, ‘x‘]
用于在列表末尾一次性追加另一个序列中的多个值（用新列表扩展原来的列表）。
cities = ["北京","上海",["深圳","广州"],"杭州"] new_cities = ["武汉","成都","重庆","南京"] cities.extend(new_cities) print(cities)
输出打印结果：
[‘北京‘, ‘北京‘, ‘北京‘, ‘杭州‘, ‘武汉‘, ‘成都‘, ‘重庆‘, ‘南京‘, ‘武汉‘, ‘成都‘, ‘重庆‘, ‘南京‘]
计算列表元素个数。
cities = ["北京","上海",["深圳","广州"],"杭州"] print(cities) nums = len(cities) print(nums)
打印输出结果：
[‘北京‘, ‘上海‘, [‘深圳‘, ‘广州‘], ‘杭州‘] 4
标签：rem 智能 人工 app 南京 函数 family size 重庆
原文地址：https://www.cnblogs.com/bad-robot/p/9678699.html
