正则表达式

Question

这是部分数据

Broan Range Hood (BP130WWN) - White
Broan Range Hood (BP130BLN) - Black
Broan Range Hood (GP124WWN) - White
Broan Range Hood (GP130WWN) - White
Broan Range Hood (QS130WWN) - White
Broan Range Hood (QS130BLN) - Black
Broan Range Hood (QS130SSN) - Stainless
Broan Range Hood (QS230WWN) - White
Broan Range Hood (QS230BLN) - Black
Broan Range Hood (QS230SSN) - Stainless
Broan Range Hood (QS330WWN) - White
Broan Range Hood (QS330BLN) - Black
Broan Range Hood (QS330SSN) - Stainless
Broan Range Hood (E66130SSL) - Stainless
Broan Range Hood (RM503004) - Stainless
Broan Range Hood (273003) - Stainless

我想删除(RM503004) , (273003)这可能是包裹在() 3 到 11 个字母数字代码

使用 Python 我可以像下面这样使用它：

text = re.sub('[a-zA-Z0-9]{3,11}', ' ', dataset['Title'][i])

但它的输出并不如预期，这将是：

Broan Range Hood  - White
Broan Range Hood  - Black
Broan Range Hood  - White
Broan Range Hood  - White
Broan Range Hood  - White
Broan Range Hood  - Black
Broan Range Hood  - Stainless
Broan Range Hood  - White
Broan Range Hood  - Black
Broan Range Hood  - Stainless
Broan Range Hood  - White
Broan Range Hood  - Black
Broan Range Hood  - Stainless
Broan Range Hood  - Stainless
Broan Range Hood  - Stainless
Broan Range Hood  - Stainless

Answer 1

您还需要匹配文字括号，需要用反斜杠转义。

为了保持空白看起来不错，也匹配周围的空白，然后用空格替换：

text = re.sub('\s*\([a-zA-Z0-9]{3,11}\)\s*', ' ', dataset['Title'][i])

Answer 2

如此接近，只需添加转义括号：

\([a-zA-Z0-9]{3,11}\)\s*

测试

import re

string = '''
Broan Range Hood (BP130WWN) - White
Broan Range Hood (BP130BLN) - Black
Broan Range Hood (GP124WWN) - White
Broan Range Hood (GP130WWN) - White
Broan Range Hood (QS130WWN) - White
Broan Range Hood (QS130BLN) - Black
Broan Range Hood (QS130SSN) - Stainless
Broan Range Hood (QS230WWN) - White
Broan Range Hood (QS230BLN) - Black
Broan Range Hood (QS230SSN) - Stainless
Broan Range Hood (QS330WWN) - White
Broan Range Hood (QS330BLN) - Black
Broan Range Hood (QS330SSN) - Stainless
Broan Range Hood (E66130SSL) - Stainless
Broan Range Hood (RM503004) - Stainless
Broan Range Hood (273003) - Stainless

'''

expression = r'\([a-zA-Z0-9]{3,11}\)\s*'

print(re.sub(expression, '', string))

输出

Broan Range Hood - White
Broan Range Hood - Black
Broan Range Hood - White
Broan Range Hood - White
Broan Range Hood - White
Broan Range Hood - Black
Broan Range Hood - Stainless
Broan Range Hood - White
Broan Range Hood - Black
Broan Range Hood - Stainless
Broan Range Hood - White
Broan Range Hood - Black
Broan Range Hood - Stainless
Broan Range Hood - Stainless
Broan Range Hood - Stainless
Broan Range Hood - Stainless

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如果你想简化/更新/探索表达式，它已在regex101.com 的右上角面板中进行了解释。 如果您有兴趣，可以在此调试器链接中观看匹配步骤或修改它们。 调试器演示了 RegEx 引擎如何逐步使用一些示例输入字符串并执行匹配过程。

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