regex - python re sub vs findall -

-

मेरा कोड: 

  आयात urlib आयात पुनः xml = urllib.urlopen ('url' ) .read ()

मुझे XML टैग से कुछ टैग और उनकी सामग्री को हटाने में दिलचस्पी है, इसलिए, मैं नियमित अभिव्यक्तियों का उपयोग करने की कोशिश करता हूं।

उदाहरण के लिए: < / P> 

  पुनः.फंडॉल (आर 'और एलटी। अंजीर (। *?) & Lt; / fig & gt;', xml, re.DOTALL)

मेल और खाली नहीं है।

हालांकि, 

  re.sub (r '& lt; अंजीर (। *?) & Lt; / fig & gt;', '', xml, पुनः। DOTALL)

कुछ नहीं करता है, XML स्ट्रिंग अपरिवर्तित है। मैं क्यों भ्रमित हूँ, कृपया मदद करें।

का चौथा पैरामीटर नहीं है flags < / कोड>, लेकिन एक की गणना । का मूल्य 16 है (कम से कम पायथन 2.7 / 3.4 में) तो re.sub (.., re.DOTALL) केवल 16 बार बदल देगा।

एक कीवर्ड तर्क के रूप में flags निर्दिष्ट करना आपकी समस्या का समाधान करेगा : 

  re.sub (r '& lt; अंजीर (। *?) & Lt; / fig & gt;', ', xml, flags = re.DOTALL)

उस के अतिरिक्त, re.sub एक प्रतिस्थापन स्ट्रिंग लौटाता है, तीसरे तर्क को जगह में नहीं बदलता है सुनिश्चित करें कि आपने फ़ंक्शन के रिटर्न मान को वापस सौंपा है।


Comments

Post a Comment

Popular posts from this blog

python - Strange behavior using PyQt4's 'pyqtSlot' decorator before another decorator -

-
I have a strange problem with using the QtCore.pyqtSlot decorator in front of the function decorated with a different decorator. The problem below shows this problem, it immediately provides a low QT program with a single button. When pressing a button, the following happens: (1) The signal 'signal_A' and 'signal_B' sequence are connected to method_A and method_B ​​respectively. (2) signal_A and signal_B signals are emitted. (3) The required behavior is that the method_A and method_B ​​are executed. However, it turns out that both signal_A and signal_B trigger method_A, or method_B ​​(oddly, this is nondeterministic, and different for each part of the program!). It appears to be a bug. This issue is present when PyQt4 binding is used in Qt. It is not present when using PySide (use the '-pyside' parameter to verify) I have seen both problems in Python 2 and 3, and both in Windows and Linux This issue is related to the insertion of a decorator be...
Read more

c# - UnhandledExceptionMode.ThrowException for AppDomain.UnhandledException -

-
I want to set unhandledExceptionMode.ThrowException for current AppDomain and not only for application threads. An exception from the second thread should also be handled by my current Donan_Unimated exception handler. Is it possible? Here's my code: Fixed class program {/// & lt; Summary & gt; Main entry point for the application /// & lt; / Summary & gt; [STAThread] static zero major () {applications Set unhandled exception mode (unwanted exception. Throws up); AppDomain.CurrentDomain.UnhandledException + = New UnrestrictedExceptionEndception (CurrentDomain_UnhandledException); Application.EnableVisualStyles (); Application.SetCompatibleTextRenderingDefault (wrong); Application.Run (New Form 1 ()); } Static Zero CurrentDomain_UnhandledException (Object Sender, UnhandledExceptionEventArgs E) {File.AppendAllText ("Log.txt", (Exception) e.ExceptionObject). Message + environment. Newline); }} Maybe you search for the behavior provided by Applic...
Read more

c# - Process.Kill() returns access denied -

-
I'm trying to kill a process using a CMD command line from my C # application, but when I start the application does not happen anything. .. When I try to kill with a command prompt, I get the message: "Access denied" I tried to run as my app administrator and the process was killed. How can I not always use "Run as administrator"? Code: System.Diagnostics.Process process = new System.Diagnostics.Process (); System.Diagnostics.ProcessStartInfo startInfo = New system. Diagnostics. Process STARTINFO (); StartInfo.WindowStyle = System.Diagnostics.ProcessWindowStyle.Hidden; StartInfo.FileName = "cmd.exe"; StartInfo.Arguments = "/ C Tasky / F / IM APP.exe"; Process.start.info = startInfo; Process.start (); try it System.Diagnostics.Process Process = new system Diagnostics Process (); System.Diagnostics.ProcessStartInfo startInfo = New system. Diagnostics. Process STARTINFO (); StartInfo.WindowStyle = System.Diagnostics.ProcessWindowS...
Read more