04. 万恶之源-基本数据类型(list,tuple)

 lst = [1, ‘哈哈‘, "吼吼", [1,8,0,"百度"], ("我","叫", "元", "组"), "abc", {"我叫":"dict字典"},{"我叫集合","集合"}] 

lst = ["麻花藤", "王剑林", "马芸", "周鸿医", "向华强"]
print(lst[0]) # 获取第一个元素
print(lst[1])
print(lst[2])
lst[3] = "流动强" # 注意. 列表是可以发生改变的. 这里和字符串不一样
print(lst) # [‘麻花藤‘, ‘王剑林‘, ‘马芸‘, ‘流动强‘, ‘向华强‘]
s0 = "向华强"
s0[1] = "美" # TypeError: ‘str‘ object does not support item assignment 不允许改变
print(s0)

lst = ["麻花藤", "王剑林", "马芸", "周鸿医", "向华强"]
print(lst[0:3]) # [‘麻花藤‘, ‘王剑林‘, ‘马芸‘]
print(lst[:3]) # [‘麻花藤‘, ‘王剑林‘, ‘马芸‘]
print(lst[1::2]) # [‘王剑林‘, ‘周鸿医‘] 也有步长
print(lst[2::-1]) # [‘马芸‘, ‘王剑林‘, ‘麻花藤‘] 也可以倒着取
print(lst[-1:-3:-2]) # 倒着带步长

lst = ["麻花藤", "林俊杰", "周润发", "周芷若"]
print(lst)
lst.append("wusir")
print(lst)
lst = []
while True:
 content = input("请输入你要录入的员工信息, 输入Q退出:")
 if content.upper() == ‘Q‘:
 break
 lst.append(content)
print(lst)
lst = ["麻花藤", "张德忠", "孔德福"]
lst.insert(1, "刘德华") # 在1的位置插入刘德华. 原来的元素向后移动一位
print(lst)
# 迭代添加
lst = ["王志文", "张一山", "苦海无涯"]
lst.extend(["麻花藤", "麻花不疼"])
print(lst)

lst = ["麻花藤", "王剑林", "李嘉诚", "王富贵"]
print(lst)
deleted = lst.pop() # 删除最后一个
print("被删除的", deleted)
print(lst)
el = lst.pop(2) # 删除2号元素
print(el)
print(lst)
lst.remove("麻花藤") # 删除指定元素
print(lst)
# lst.remove("哈哈") # 删除不存在的元素会报错
# # print(lst)
lst.clear() # 清空list
print(lst)
# 切片删除
del lst[1:3]
print(lst)

# 修改
lst = ["太白", "太黑", "五色", "银王", "日天"]
lst[1] = "太污" # 把1号元素修改成太污
print(lst)
lst[1:4:3] = ["麻花藤", "哇靠"] # 切片修改也OK. 如果步长不是1, 要注意. 元素的个数
print(lst)
lst[1:4] = ["李嘉诚个龟儿子"] # 如果切片没有步长或者步长是1. 则不用关心个数
print(lst)

for el in lst:
 print(el)

lst = ["太白", "太黑", "五色", "银王", "日天", "太白"]
c = lst.count("太白") # 查询太白出现的次数
print(c)
lst = [1, 11, 22, 2]
lst.sort() # 排序. 默认升序
print(lst)
lst.sort(reverse=True) # 降序
print(lst)
lst = ["太白", "太黑", "五色", "银王", "日天", "太白"]
print(lst)
lst.reverse()
print(lst)
l = len(lst) # 列表的长度
print(l)

lst = [1, "太白", "wusir", ["马虎疼", ["可口可乐"], "王剑林"]]
# 找到wusir
print(lst[2])
# 找到太白和wusir
print(lst[1:3])
# 找到太白的白字
print(lst[1][1])
# 将wusir拿到. 然后首字母大写. 再扔回去
s = lst[2]
s = s.capitalize()
lst[2] = s
print(lst)
# 简写
lst[2] = lst[2].capitalize()
print(lst)
# 把太白换成太黑
lst[1] = lst[1].replace("白", "黑")
print(lst)
# 把马虎疼换成马化疼
lst[3][0] = lst[3][0].replace("虎", "化")
print(lst[3][0])
lst[3][1].append("雪碧")
print(lst)

tu = (1,)
print(type(tu))

for num in range(10):
 print(num)
for num in range(1, 10, 2):
 print(num)
for num in range(10, 1, -2): # 反着来, 和切片一样
 print(num