Question

pattern = "world! {} "
text = "hello world! this is python"

鉴于上面的模式和文本，我如何生成一个将模式作为第一个参数，将文本作为第二个参数并输出单词“ this”的函数？

例如

find_variable(pattern, text) ==>返回“ this”，因为“ this”

Answer 1

您可以使用此函数，该函数使用string.format来构建具有单个捕获组的正则表达式：

>>> pattern = "world! {} "
>>> text = "hello world! this is python"
>>> def find_variable(pattern, text):
...     return re.findall(pattern.format(r'(\S+)'), text)[0]
...
>>> print (find_variable(pattern, text))

this

PS：您可能想在函数内部添加一些完整性检查，以验证字符串格式和成功的findall。

Code Demo

Answer 2

不是一个像anubhava那样的内衬，而是使用了基本的python知识：

const encrypted = ... //holds our encrypted data
const key = ... // holds our 32 bytes key
const iv = ... //holds our 32 bytes iv

const decipher = new Rijndael(key, 'cbc');
const decryptedPadded = decipher.decrypt(encrypted, 256, iv);
//Remember to un-pad result
const decrypted = padder.unpad(decryptedPadded, 32);
const clearText = decrypted.toString('utf8');

console.log(clearText); //-> Here is my plain text

给定带有变量的字符串模式，如何使用python匹配和查找变量字符串？

2 个答案: