获取字符串的最后4个字符[duplicate]

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这个问题已经有了答案:

Is there a way to substring a string in Python? 10 answers
在Python中是否有一种方法可以对字符串进行子字符串连接?10个答案

I have the following string: "aaaabbbb"

我有以下字符串"aaaabbbb"

How can I get the last four characters and store them in a string using Python?

如何使用Python获取最后四个字符并将它们存储在字符串中?

2 个解决方案

#1

477

Like this:

是这样的:

>>>mystr = "abcdefghijkl"
>>>mystr[-4:]
'ijkl'

This slices the string's last 4 characters. The -4 starts the range from the string's end. A modified expression with [:-4] removes the same 4 characters from the end of the string:

这将分割字符串的最后4个字符。-4从字符串的末尾开始取值范围。修改后的表达式[:-4]从字符串末尾删除相同的4个字符:

>>>mystr[:-4]
'abcdefgh'

For more information on slicing see this Stack Overflow answer.

有关切片的更多信息，请参见此堆栈溢出答案。

#2

str = "aaaaabbbb"
newstr = str[-4:]

See : http://codepad.org/S3zjnKoD

参见:http://codepad.org/S3zjnKoD

#1

477