Python基础之列表

定义一个列表

name_list = ["zhangsan","lisi","wangwu","wangxiaoer","wangwu","wangxiaoer"]
num_list = ["1","3","2","0"]

增加列表内的指定参数索引和参数

name_list = ["zhangsan","lisi","wangwu","wangxiaoer","wangwu","wangxiaoer"]
name_list.insert(0,"long")
print(name_list)

运行结果：

D:\软件下载\python.exe E:/资料/python/hexo/test.py
['long', 'zhangsan', 'lisi', 'wangwu', 'wangxiaoer', 'wangwu', 'wangxiaoer']

进程已结束，退出代码 0

增加另一个列表内容到此列表中

name_list = ["zhangsan","lisi","wangwu","wangxiaoer","wangwu","wangxiaoer"]
num_list = ["1","2","3"]
name_list.extend(num_list)
print(name_list)

运行结果：

D:\软件下载\python.exe E:/资料/python/hexo/test.py
['zhangsan', 'lisi', 'wangwu', 'wangxiaoer', 'wangwu', 'wangxiaoer', '1', '2', '3']

进程已结束，退出代码 0

增加一个参数到列表的尾部

name_list = ["zhangsan","lisi","wangwu","wangxiaoer","wangwu","wangxiaoer"]
name_list.append("long")
print(name_list)

运行结果：

D:\软件下载\python.exe E:/资料/python/hexo/test.py
['zhangsan', 'lisi', 'wangwu', 'wangxiaoer', 'wangwu', 'wangxiaoer', 'long']

进程已结束，退出代码 0

删除列表内指定的参数

name_list = ["zhangsan","lisi","wangwu","wangxiaoer","wangwu","wangxiaoer"]
name_list.remove("lisi")
print(name_list)

运行结果：

D:\软件下载\python.exe E:/资料/python/hexo/test.py
['zhangsan', 'wangwu', 'wangxiaoer', 'wangwu', 'wangxiaoer']

进程已结束，退出代码 0

删除列表内最后一个参数

name_list = ["zhangsan","lisi","wangwu","wangxiaoer","wangwu","wangxiaoer"]
name_list.pop()
print(name_list)

运行结果：

D:\软件下载\python.exe E:/资料/python/hexo/test.py
['zhangsan', 'lisi', 'wangwu', 'wangxiaoer', 'wangwu']

进程已结束，退出代码 0

修改列表内的参数

name_list = ["zhangsan","lisi","wangwu","wangxiaoer","wangwu","wangxiaoer"]
name_list[0] = "xinxin"
print(name_list)

运行结果：

D:\软件下载\python.exe E:/资料/python/hexo/test.py
['xinxin', 'lisi', 'wangwu', 'wangxiaoer', 'wangwu', 'wangxiaoer']

进程已结束，退出代码 0

清空列表中的数据

name_list = ["zhangsan","lisi","wangwu","wangxiaoer","wangwu","wangxiaoer"]
name_list.clear()
print(name_list)

运行结果：

D:\软件下载\python.exe E:/资料/python/hexo/test.py
[]

进程已结束，退出代码 0

统计列表长度

name_list = ["zhangsan","lisi","wangwu","wangxiaoer","wangwu","wangxiaoer"]
lenght = len(name_list)
print(lenght)

运行结果：

D:\软件下载\python.exe E:/资料/python/hexo/test.py
6

进程已结束，退出代码 0

统计数据在列表中出现的次数

name_list = ["zhangsan","lisi","wangwu","wangxiaoer","wangwu","wangxiaoer"]
num = name_list.count("wangxiaoer")
print(num)

运行结果：

D:\软件下载\python.exe E:/资料/python/hexo/test.py
2

进程已结束，退出代码 0

列表中数据排序

name_list = ["CC","BB","AA","DD","WW","YY"]
num_list = ["1","3","2","0"]
print(num_list)   # 排序前打印
print(name_list)  # 排序前打印
num_list.sort()   # 排序
name_list.sort()  # 排序
print(num_list)   # 排序后打印
print(name_list)   # 排序后打印

运行结果：

D:\软件下载\python.exe E:/资料/python/hexo/test.py
['1', '3', '2', '0']          #  排序前打印
['CC', 'BB', 'AA', 'DD', 'WW', 'YY']    # 排序前打印
['0', '1', '2', '3']         # 排序后打印
['AA', 'BB', 'CC', 'DD', 'WW', 'YY']         # 排序后打印

进程已结束，退出代码 0

打印列表中的数据

alist = [10, 20, 30, 'bob', 'alice', [1,2,3]]
# 打印最后一项
print(alist[-1])
# 因为最后一列是列表,列表还可以继续取下标
print(alist[-1][-1])
# 10 是否在列表中
print(10 in alist)
# 字符 "qq" 是否在列表中
print("qq" in alist)

运行结果：

D:\软件下载\python.exe E:/资料/python/hexo/test2.py
[1, 2, 3]
3
True
False

进程已结束，退出代码 0