class Document:def __init__(self):self.characters = []self.cursor = 0self.filename = ''def insert(self, character):self.characters.insert(self.cursor, character)self.cursor += 1def delete(self):del self.characters[self.cursor]def save(self):with open(self.filename, 'w') as f:f.wr...
character at the same position in y. If there is a third argument, it must be a string, whose characters will be mapped to None in the result. Docstring: S.translate(table) -> str Return a copy of the string S in which each character has been mapped through the given translation tabl...
So Python returns a new string to me. 我也可以使用负索引进行切片。 I can also do slicing using negative indices. 例如,如果我键入S,减去3,Python将给出该序列中的最后三个字符,即h、o和n。 So for example, if I type S, minus 3, Python will give me the last three characters in that sequ...
defget_last_three_characters(string):returnstring[-3:]# 测试示例string1="Hello"string2="Mermaid"string3="Python"last_three1=get_last_three_characters(string1)last_three2=get_last_three_characters(string2)last_three3=get_last_three_characters(string3)print(f"The last three characters of '{s...
# Otherwise, return the string of the result of this move. makeMove() 函数接受四个参数:游戏板的数据结构,宝藏箱的数据结构,x 坐标和 y 坐标。makeMove() 函数将返回一个描述移动响应的字符串值: 如果坐标直接落在宝藏箱上,makeMove() 返回'You have found a sunken treasure chest!'。 如果坐标距离...
将String 变量转换为 float、int 或 boolean 向字符串填充或添加零的不同方法 去掉字符串中的 space 字符 生成N个字符的随机字符串 以不同的方式反转字符串 将Camel Case 转换为 Snake Case 并更改给定字符串中特定字符的大小写 检查给定的字符串是否是 Python 中的回文字符串 ...
S.expandtabs([tabsize]) -> string|| Return a copy of S where all tab characters are expan...
to_string to_excel prod fillna backfill align pct_change expanding nsmallest append attrs rmod bfill ndim rank floordiv unstack groupby skew quantile copy ne describe sort_index truediv mode dropna drop compare tz_convert cov equals memory_usage sub pad rename_axis ge mean last cummin notna ...
If sep is not specified, any whitespace string | is a separator. | | rstrip(...) | S.rstrip([chars]) -> str | Return a copy of the string S with trailing whitespace removed. | If chars is given and not None, remove characters in chars instead. | | split(...) ...
python基础的随笔更多是偏向于我个人代码实现和讨论,所以对于知识点不会有一个比较输入的说明,知识点可能会在之后系列再做总结。如果后面总结知识点我大概率会手打,截图属实起不到加强记忆的效果,如果可以我会尽量做一个知识点目录(同参考课程进度) 概述