我目前正在尝试在python上执行一个应该匹配多行的正则表达式。
([0-9]{2}\.[0-9]{2}\.[0-9]{4}\s[0-9]{2}:[0-9]{2}:[0-9]{2}).*?\r\n-{1,}\sFG\s{3,}?4
是我的正则表达式，这是我的python调用
re.findall("([0-9]{2}\.[0-9]{2}\.[0-9]{4}\s[0-9]{2}:[0-9]{2}:[0-9]{2}).*?\r\n-{1,}\sFG\s{3,}?4.*?", content, flags=re.M)
然而，当我在Notepad ++中使用正则表达式时，它为我提供了正确的匹配，而在python中它根本不匹配任何东西（这里是一个在npp中匹配但不在python中匹配的示例字符串）
19.04.2016 01:59:18 ASDF
---- FG 3
--------------- ASDF
19.04.2016 01:59:21 ASDF
---- FG 4
--------------- ASDF
19.04.2016 01:59:22 ASDF
---- FG 4
--------------- ASDF
我也确定实际上有一个\ r \ n，因为npp为我提供了匹配。
由于我使用多行标记，我完全不知道为什么我的正则表达式不起作用。
答案 0 :(得分：2)
请注意，在显示的更正输入中，模式的部分//Mysql connect info
$servername = "removed";
$username = "removed";
$password = "removed";
$database = "removed";
$link = new mysqli($servername, $username, $password, $database);
if ($link->connect_error)
{
die("Connection failed: " . $link->connect_error);
}
//Get or send the information from/to the game
$func = $_GET['func'];
$hash = $link->real_escape_string($_GET['user']);
$bonus = $link->real_escape_string($_GET['bonus']);
class CheckUser
{
function CheckBonus($hash)
{
global $link;
global $hash;
$query = "SELECT bonustier, resettime, userid FROM members WHERE userid = ?";
if ($stmt = $link->prepare($query))
{
$stmt->bind_param('s', $hash);
$stmt->execute();
$stmt->store_result();
if($stmt->num_rows > 0)
{
$stmt->bind_result($bonustier, $resettime, $hash);
while($stmt->fetch())
{
//Check if enough time has passed since last login bonus
$time = time();
$time2 = ((($time - $resettime) / 60) / 60);
$time3 = substr($time2, 0, strpos($time2, "."));
if($time3 >= 24)
{
$connection = 1;
$usergood = 1;
$loginbonus = 1;
$hoursince = $time3;
$bonusarray = array(
'BonusCheck' => array(
'connection' => $connection,
'usergood' => $usergood,
'loginbonus' => $loginbonus,
'bonustier' => $bonustier,
'hoursince' => $time3
),
);
$bonusjson = json_encode($bonusarray, 128);
echo $bonusjson;
}
else //If enough time has not passed, tell the game.
{
$connection = 1;
$usergood = 1;
$loginbonus = 0;
$hoursince = $time3;
$bonusarray = array(
'BonusCheck' => array(
'connection' => $connection,
'usergood' => $usergood,
'loginbonus' => $loginbonus,
'bonustier' => $bonustier,
'hoursince' => $time3
),
);
$bonusjson = json_encode($bonusarray, 128);
echo $bonusjson;
}
}
}
else
{
$this->AddUser($hash);
}
}
$stmt->close();
}
function UpdateBonus($hash, $bonus)
{
global $link;
global $hash;
global $bonus;
if($stmt = $link->prepare("UPDATE members SET loginbonus = ?, bonustier = ?, resettime = ? WHERE userid=?"))
{
$stmt->bind_param('ssss', $loginbonus, $bonustier, $resettime, $hash);
switch($bonus)
{
case 0:
$bonustier = 1;
break;
case 1:
$bonustier = 2;
break;
case 2:
$bonustier = 3;
break;
case 3:
$bonustier = 4;
break;
case 4:
$bonustier = 5;
break;
case 5:
$bonustier = 0;
break;
}
$loginbonus = 0;
$resettime = time();
$success = '1';
$updatearray = array(
'UpdateBonus' => array(
'login' => $loginbonus,
'result' => $success
),
);
$updatejson = json_encode($updatearray, 128);
echo $updatejson;
$stmt->execute();
$stmt->close();
}
}
function AddUser($hash)
{
global $link;
global $hash;
if($stmt = $link->prepare("INSERT INTO members (userid, loginbonus, bonustier, resettime) VALUES (?, ?, ?, ?)"))
{
$stmt->bind_param('ssss', $userid, $loginbonus, $bonustier, $resettime);
$userid = $hash;
$loginbonus = 1;
$bonustier = 1;
$resettime = time();
$stmt->execute();
$stmt->close();
$this->CheckBonus($hash);
}
}
function CheckFunc($func)
{
switch($func)
{
case cb:
$this->CheckBonus($hash);
break;
case ub:
$this->UpdateBonus($hash, $bonus);
break;
case au:
$this->AddUser($hash);
break;
default:
echo 'Function not found.';
break;
}
}
}
$newObject = new CheckUser();
$newObject->CheckFunc($func);
?>
会避免匹配，因为FG\s{3,}?4和FG之间的单个空格不匹配。
4给了我（未经修改的python 2.7.11和3.5.1）：
#! /usr/bin/env python
from __future__ import print_function
import re
content = "19.04.2016 05:31:03 ASDFASDF\r\n---- FG 4 "
pattern = (r'([0-9]{2}\.[0-9]{2}\.[0-9]{4}\s[0-9]{2}:[0-9]{2}:[0-9]{2}).*?'
r'\r\n-{1,}\sFG\s{1,}?4.*?')
print(re.findall(pattern, content, flags=re.M))
编辑：这里是由@poke转录的更新后的修改输入样本的版本：
['19.04.2016 05:31:03']
给予（如预期）：
#! /usr/bin/env python
from __future__ import print_function
import re
content = ("19.04.2016 05:31:03 ASDFASDF\r\n---- FG 4"
"\r\n19.04.2016 05:31:03 ASDFASDF\r\n---- FG 4"
"\r\n19.04.2016 05:31:03 ASDFASDF\r\n---- FG 4"
"\r\n19.04.2016 05:31:03 ASDFASDF\r\n---- FG 4"
"\r\n19.04.2016 05:31:03 ASDFASDF\r\n---- FG 4")
pattern = (r'([0-9]{2}\.[0-9]{2}\.[0-9]{4}\s[0-9]{2}:[0-9]{2}:[0-9]{2}).*?'
r'\r\n-{1,}\sFG\s{1,}?4.*?')
print(re.findall(pattern, content, flags=re.M))
答案 1 :(得分：0)
如果您的输入包含\ r \ n的换行符，并且您更正了'FG'部分之后的间距，则应该有效：
([0-9]{2}\.[0-9]{2}\.[0-9]{4}\s[0-9]{2}:[0-9]{2}:[0-9]{2}).*?\r\n-{1,}\sFG\s+?4
在此处测试（仅限换行符\ n）： https://regex101.com/r/iT1rF2/2
答案 2 :(得分：0)
适合我：
['19.04.2016 05:31:03', '19.04.2016 05:31:03', '19.04.2016 05:31:03', '19.04.2016 05:31:03', '19.04.2016 05:31:03']
请注意，我必须在每行末尾添加显式>>> content = '''19.04.2016 05:31:03 ASDFASDF\r
---- FG 4\r
19.04.2016 05:31:03 ASDFASDF\r
---- FG 4\r
19.04.2016 05:31:03 ASDFASDF\r
---- FG 4\r
19.04.2016 05:31:03 ASDFASDF\r
---- FG 4\r
19.04.2016 05:31:03 ASDFASDF\r
---- FG 4'''
>>> re.findall("([0-9]{2}\.[0-9]{2}\.[0-9]{4}\s[0-9]{2}:[0-9]{2}:[0-9]{2}).*?\r\n-{1,}\sFG\s{3,}?4.*?", content, flags=re.M)
['19.04.2016 05:31:03', '19.04.2016 05:31:03', '19.04.2016 05:31:03', '19.04.2016 05:31:03', '19.04.2016 05:31:03']
。您说您的文字包含实际的\r，但请确保是这种情况。
如果您正在阅读文件中的内容，请注意Python执行换行标准化when you open a file。因此，尽管文件最初包含\r\n，但最终只能使用\n。
答案 3 :(得分：0)
请注意，您可以使用快捷方式重写正则表达式，以便您的模式：
([0-9]{2}\.[0-9]{2}\.[0-9]{4}\s[0-9]{2}:[0-9]{2}:[0-9]{2}).*?\r\n-{1,}\sFG\s{3,}?4
成为（快捷方式和更正）：
(\d{2}\.\d{2}\.\d{4}\s\d{2}:\d{2}:\d{2}).*?\r\n-+\sFG\s+?4