如何使用正则表达式过滤字符串？答案

【问题标题】：How to filter string using regex?如何使用正则表达式过滤字符串？
【发布时间】：2021-12-10 10:04:13
【问题描述】：

我有一个必须在 python 中过滤的字符串列表。

list=["पत्ता स नं Himanshu अष्टविनायक Address: sr no94/1B/1/2/3",
       "चाळ, जय foo boo, बस स्टोप जवळ, ashatvinayak chal, jay bhavani",
       "पिंपळे गुरव, पुणे, महाराष्ट्र, 411027 nagar, near bus stop, Pimple",
       "Gurav, Pune, Maharashtra,",
       "411027",
       "www"]

我想要欲望输出

list=["Address: sr no94/1B/1/2/3",
      "ashatvinayak chal, jay bhavani",
      "411027 nagar, near bus stop, Pimple",
      "Gurav, Pune, Maharashtra,"
      "411027",
      "www"]

我的代码

regex = re.compile("[^a-zA-Z0-9!@#$&()\\-`.+,/\"]+")
for i in list:
   print(" ".join(regex.sub(' ', i).split()))

我的输出

Himanshu Address sr no94/1B/1/2/3
, foo boo, , ashatvinayak chal, jay bhavani
, , , 411027 nagar, near bus stop, Pimple
Gurav, Pune, Maharashtra,
411027
www

如果 Himansu 出现在非英文字符之间（例如：पत्ता स नं Himanshu अष्टविनायक），我想删除它。

【问题讨论】：

regex.sub(' ', i) 不会编译，它需要输入字符串参数。
这能回答你的问题吗？ Add condition to regex to match only ASCII characters
你的代码出错了。
对不起，我忘了写正则表达式
您能否确认您只是想删除直到最后一个非英语（非 ASCII）字母的所有文本。这将使解决方案更简单。

标签： python regex

【解决方案1】：

试试这个代码：

import re
list = ["पत्ता स नं Himanshu अष्टविनायक Address: sr no94/1B/1/2/3",
        "चाळ, जय foo boo, बस स्टोप जवळ, ashatvinayak chal, jay bhavani",
        "पिंपळे गुरव, पुणे, महाराष्ट्र, 411027 nagar, near bus stop, Pimple",
        "पिं Gurav, Pune, Maharashtra,",
        "411027",
        "www"]
list2 = []
pattern = "[^a-zA-Z0-9!@\s:#$&()\\-`.+,/\"]+[, ]*(?!.*[^a-zA-Z0-9!@\s:#$&()\\-`.+,/\"]+[, ]*)"
for i in list:
    st = re.findall(pattern,i)
    if st:
        list2.append(i[i.index(st[0])+len(st[0]):])
    else:
        list2.append(i)
print(list2)

输出：
['Address: sr no94/1B/1/2/3', 'ashatvinayak chal, jay bhavani', '411027 nagar, near bus stop, Pimple', 'Gurav, Pune, Maharashtra,', '411027', 'www']

【讨论】：