redirectstandardoutput

问题 This question already has answers here : ProcessStartInfo hanging on “WaitForExit”? Why? (22 answers) Hanging process when run with .NET Process.Start — what's wrong? (5 answers) Closed 2 years ago . For processes with a lot of output or error, trying to redirect standard output and error with a simple string output = process.StandardOutput.ReadToEnd(); string err = process.StandardError.ReadToEnd(); process.WaitForExit(); will cause the program to hang, and never actually finish. 回答1: As it

问题 I use Python2.7 and I want the function: contextlib.redirect_stdout. I mean, I want to redirect the output of specific function (not the all program). The problem is - only Python3 supports "context.redirect_stdout" and no Python2.7. Someone know how can I use the same function in Python2.7 or to implement the same idea? Thanks in advance 回答1: Something like this should do the job if you're not worried about re-using the same context manager object. import sys import contextlib @contextlib

问题 I use Python2.7 and I want the function: contextlib.redirect_stdout. I mean, I want to redirect the output of specific function (not the all program). The problem is - only Python3 supports "context.redirect_stdout" and no Python2.7. Someone know how can I use the same function in Python2.7 or to implement the same idea? Thanks in advance 回答1: Something like this should do the job if you're not worried about re-using the same context manager object. import sys import contextlib @contextlib

问题 I use Python2.7 and I want the function: contextlib.redirect_stdout. I mean, I want to redirect the output of specific function (not the all program). The problem is - only Python3 supports "context.redirect_stdout" and no Python2.7. Someone know how can I use the same function in Python2.7 or to implement the same idea? Thanks in advance 回答1: Something like this should do the job if you're not worried about re-using the same context manager object. import sys import contextlib @contextlib

问题 I'm a bit confused as to why when I'm redirecting the standard output of an echo command to the standard error, why I still get the argument printed in the terminal? Here's is the line I ran echo "potato" >&2 Could someone explain this to me? How does this command output anything, if the output was redirected somewhere else? Thank you :) 回答1: I think what you want is: bash-3.2$ echo "potato" &>2 bash-3.2$ From the man page for bash: Redirecting Standard Output and Standard Error Bash allows

问题 I'm writing a C# GUI Wrapper that wraps around an executable (which I CAN NOT modify because I do not have the source code). The problem I'm facing appears to be related to the fact the executable output does not end with a 'newline' character. Instead, the .exe starts work and expects user input (s=status, q=quit, etc..). I've spent a lot of time researching various ways to read StdOut, one with Asynchronous reads and listening for events, and the other method was with separate threads

问题 I want to inspect line by line standard output from process. after reading the second line myProcess.StandardOutput.EndofStream change from false to true. Hence it quits from while loop. Maybe I should use something else? Process myProcess = new Process(); try { myProcess.StartInfo.UseShellExecute = false; myProcess.StartInfo.FileName = my_command; myProcess.StartInfo.Arguments = " "+ location; myProcess.StartInfo.CreateNoWindow = true; myProcess.StartInfo.RedirectStandardOutput = true;

问题 I am writing an app to run ffmpeg using c#. My program redirects the standardError output to a stream so it can be parsed for progress information. During testing I have found a problem: If the output is shown in a command window rather than being redirected ffmpeg will display it's normal headers followed by "file c:\temp\testfile.mpg already exists. overwrite [y]" . If I click on the command window and press y the program continues to encode the file. If the StandardError is redirected to

问题 I can understand that there has been a lot of questions on this topic but none of them could really solve my problem. So here I have presented my code, and I want my mistakes to be pointed out here. I have a program written in C# which shall call a python executable/file. The first requirement is that I have pass one argument to the python file via the input stream. This I could do. The real problem I am facing now is that, I have to see whether my python file is printing "Please enter

问题 I have a program that launches command line processes in async mode, using BeginOutputReadLine. My problem is that the .Exited event is triggered when there is still some .OutputDataReceived events being triggered. What I do in my .Exited event must happen only once all my .OutputDataReceived events are done, or I'll be missing some output. I looked in the Process class to see if anything could be useful to me, as to wait for the stream to be empty, but all I find is for sync mode only. Can