Question

我正在尝试从某些文本中提取电话号码

问题是我得到了4个不同的匹配项，在这里我只想要此特定表达式的完整匹配项。例如，我得到：

public async static Task Main(string[] args)
{
    TcpClient tc = new TcpClient();
    await tc.ConnectAsync("smtp-mail.outlook.com", 587);
    MyStream ms = new MyStream(tc);
    byte[] response = new byte[64*1024];
    int n;
    string command;
    byte[] request;
    n = await ms.ReadAsync(response, 0, response.Length);
    command = "EHLO domain\r\n";
    request = Encoding.ASCII.GetBytes(command);
    await ms.WriteAsync(request, 0, request.Length);
    n = await ms.ReadAsync(response, 0, response.Length);
    Console.WriteLine(Encoding.ASCII.GetString(response, 0, n));
    command = "STARTTLS\r\n";
    request = Encoding.ASCII.GetBytes(command);
    await ms.WriteAsync(request, 0, request.Length);
    n = await ms.ReadAsync(response, 0, response.Length);
    Console.WriteLine(Encoding.ASCII.GetString(response, 0, n));
    SslStream ssl = new SslStream(ms);
    await ssl.AuthenticateAsClientAsync("smtp-mail.outlook.com");
    command = "RSET\r\n";
    request = Encoding.ASCII.GetBytes(command);
    await ssl.WriteAsync(request, 0, request.Length);
    n = await ssl.ReadAsync(response, 0, response.Length);
    Console.WriteLine(Encoding.ASCII.GetString(response, 0, n));
    command = "QUIT\r\n";
    request = Encoding.ASCII.GetBytes(command);
    await ssl.WriteAsync(request, 0, request.Length);
    n = await ssl.ReadAsync(response, 0, response.Length);
    Console.WriteLine(Encoding.ASCII.GetString(response, 0, n));
    ssl.Dispose();
    tc.Close();
}

如您所见，我只需要该列表中的第一个匹配项。

这是我的代码：

Match 1
1.  054-434-4321
2.  054
3.  -
4.  -

Match 2
1.  (03) 502 9571
2.  (03)
3.  
4.

这是正则表达式：

text = "You can reach me at 054-434-4321, or my office at (03) 502 9571 or (050) 223 957.\ 
Send me a fax at 03 502 7422. We finally made the sale for all 977 giraffes.\
They wanted 225 957 dollars for it"

phone_pattern = re.compile(r'(\d{2,3}|\(\d{2,3}\))(-| )\d{3}(-| )\d{3,4})')
phone_results = phone_pattern.findall(text)
print(f'extracted {len(phone_results)} results : {phone_results}')

为了不对结果进行分组，我试图将括号放在表达式的末尾。

Answer 1

创建non-capturing with ?:子组。

import re

text = """
You can reach me at 054-434-4321, or my office at (03) 502 9571 or (050) 223 957.
Send me a fax at 03 502 7422. We finally made the sale for all 977 giraffes.
They wanted 225 957 dollars for it.
"""

phone_pattern = re.compile(r'(?:\d{2,3}|\(\d{2,3}\))(?:-| )\d{3}(?:-| )\d{3,4}')

for result in phone_pattern.findall(text):
    print(result)

输出

054-434-4321
(03) 502 9571
(050) 223 957
03 502 7422

Answer 2

简单地为：

Change

输出：

fetch('https://quotesondesign.com/wp-json/posts?filter[orderby]=rand&filter[posts_per_page]=1')
  .then(function(response) {
    return response.json();
  })
  .then(function(myJson) {
    console.log(myJson);
  });

获取完整的正则表达式匹配

2 个答案: