详解python字符串相关str

目录

• 1：访str单个字符
• 2： 字符串连接
• 3：str切片
• 4：使用in 和not in 测试字符串
• 5：str方法
• 6：重复操作符
• 7：分割字符串
• 总结

#for循环迭代
name = "Chengwei"
for ch in name:
    print(ch, end=" ")
#C h e n g w e i
#索引
print(name[1])
#h
print(name[-1]) #最后一个为 -1
#i
#len()函数返回str字符串数量
print(len(name))
#8

message = "hello" + "world"
print(message)
#helloworld

message = "helloworld"
print(message[2:4])
#ll

message = "helloworld"
if "hello" in message:
    print("YES")
#YES
if "aaa" not in message:
    print("YES")
#YES

print("hello" * 2)
#hellohello

message = "hello world chengwei"
message_list = message.split()
print(message_list)
#["hello", "world", "chengwei"]
message = "hello,world,chengwei"
message_list = message.split(",")
print(message_list)
#["hello", "world", "chengwei"]