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blog:python:string [2022/09/12 09:05] – caodan | blog:python:string [2023/05/19 20:21] (当前版本) – [字符串截取操作] caodan | ||
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行 1: | 行 1: | ||
# 字符串 | # 字符串 | ||
+ | 用单引号`'' | ||
+ | |||
+ | 如果字符串中既包含`' | ||
+ | |||
+ | 例如: `str=" | ||
## 字符串截取操作 | ## 字符串截取操作 | ||
行 16: | 行 21: | ||
| `str[4:] ` | efg | characters from position 4 to the end | | | `str[4:] ` | efg | characters from position 4 to the end | | ||
| `str[-2:] ` | fg | characters from the second last to the end | | | `str[-2:] ` | fg | characters from the second last to the end | | ||
- | | `str[-1:] ` | fg | the last character | + | | `str[-1:] ` | f |
| `str[: | | `str[: | ||
| `str[::-1]` | gfedcba | | `str[::-1]` | gfedcba | ||
| `str[::-2]` | geca | `[::-2]` 字符串逆序,间隔一个字符 | | `str[::-2]` | geca | `[::-2]` 字符串逆序,间隔一个字符 | ||
- | |||
## ord & chr | ## ord & chr | ||
+ | ord将字符转换为对应的ASCII码 | ||
+ | |||
+ | chr 将0-255的任一整数转换为对应的字符 | ||
## join | ## join |