In addition, we canaccess just a specific characteror aslice of charactersof a string. We might want to do this, for example, if we have a text that’s too long to display and we want to show just a portion of it. Or if we want to make an acronym by taking the first letter of...
defget_last_character(string):last_char=string[-1]returnlast_char# 测试代码my_string="Python is awesome"result=get_last_character(my_string)print(f"The last character of '{my_string}' is '{result}'") 1. 2. 3. 4. 5. 6. 7. 8. 运行上面的代码,你将会看到输出结果为: AI检测代码解析...
Again as with lists, we can use negative indexes for strings, where -1 is the index of the last character①. Positive and negative indexes give us two ways to refer to any position in a string. In this case, when the string had a length of 12, indexes 5 and -7 both refer to the...
word[-1]# Last character. 输出为: Output 'n' 同样地,其他负索引会从相应的位置返回字符: Python word[-2]# Second-to-last character. 输出为: Output 'o' 切片 Python 既支持索引,也支持切片,前者从字符串中提取单个字符,后者提取子字符串(或切片)。 若要进行切片,需采用“开始:结束”格式指示范围。
Python 提供了两种直接的方法来反转字符串。由于字符串是序列,因此它们是indexable、sliceable和iterable。这些功能允许您使用切片以相反的顺序直接生成给定字符串的副本。第二个选项是使用内置函数reversed()创建一个迭代器,该迭代器以相反的顺序生成输入字符串的字符。
follows this rule:s[:i] + s[i:] == sfor any index ‘i’. All these parameters are optional - start_pos default value is 0, the end_pos default value is the length of string and step default value is 1. Let’s look at some simple examples of string slice function to create ...
In that case, I specify the starting point of the slice and the end point of the slice. 所以在这种情况下,我得到字母“Pyt” So in this case, I get the letters "Pyt." 因此Python向我返回一个新字符串。 So Python returns a new string to me. 我也可以使用负索引进行切片。 I can also ...
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 ...
我正在尝试从最后一个符号“/”中分割URL。 例如,我有一个URLhttp://google.com/images/54152352。 现在我需要图像中54152352的部分。 我知道我可以简单地从某个字符上进行切片,但是我有一个url列表,每个url都是不同的。 其他URL示例: https://google.uk/images/kfakp3ok2 #I would need kfakp3ok2 ...
['Learn string'] >>> str.partition('n') ('Lear', 'n', ' string') >>> str.rpartition('n') ('Learn stri', 'n', 'g') 2.string模块源代码 1 """A collection of string operations (most are no longer used). 2 3 Warning: most of the code you see here isn't normally used...