stdout

I'm trying to redirect the stdout of a function to a tkinter text widget. The problem I am running into is that it writes each line to a new window instead of listing everything in one. The function scans a directory and lists any file that is 0k. If no files are 0k it prints that. So, the problem is that if there are 30 0k files in a directory, it will open 30 windows with a single line in each. Now, I know what the problem is. If you look in my function code Zerok() I am telling it: if os.stat(filename).st_size==0: redirector(filename) I know that every time os.stat sees a file that is 0k it

from sys import argv, stdout as cout from time import sleep as sl print("Rewinding.......",end = '') # If end is given output isn't flushed. But why? cout.flush() for i in range(0,20): sl(0.2) print(".",end='',flush = True) #No output is printed if flush wasn't specified as true. print("Done") #Output is by default flushed here When I specified end and sleep, I noticed that output wasn't flushed until next print where it was by default flushed. Why does this happen? I had to manually flush the output. In fact this is the default behavior of the underlying stdio functions. When the output is to

This is elementary I guess: Let's consider this snippet: for i in range(3): sys.stdout.write(str(i) + '\n') out: 0 1 2 and this: for i in range(3): sys.stdout.write(str(i) + sys.argv[1]) out (after passing \n as argument): 0\n1\n2\n So, how can I pass new-line as argument? sys.stdout.write(str(i) + sys.argv[1].decode("string_escape")) 来源： https://stackoverflow.com/questions/5715414/passing-n-new-line-on-stdout-throught-sys-argument

When launching a Python process, in background, with nohup python myscript.py > test.log 2>&1 < /dev/null & the problem is that stdout is buffered: the data is not written in realtime to test.log . The common solution to this problem is to flush periodically with sys.stdout.flush() , or even better, as suggested by this answer , to use python -u : nohup python -u myscript.py > test.log 2>&1 < /dev/null & But this is not enough . I noticed that it worked during a few hours, and then, it stopped working, i.e. after a few hours test.log is not written in realtime anymore, even if I used nohup

in C i want to redirect the output of a process from stdout to write to a "shared memory segment" which can be thought of as a char array or a string with a pointer i know that there is dup2 but it takes file discriptors as argument not a pointer to an array. is there any way to redirect it to a string? char string[SIZE]; freopen("/dev/null", "a", stdout); setbuf(stdout, string); see freopen and setbuf for their definitions This should work on UNIX systems: // set buffer size, SIZE SIZE = 255; char buffer[SIZE]; freopen("/dev/null", "a", stdout); setbuf(stdout, buffer); printf("This will be

I was wondering if this is possible in python. #module1 def test(): print 'hey' #module2 import module1 # *Without modifying module1* is there anyway to wrap this in module2 so that I can capture the # print 'hey' inside a variable? apart from running module1 as a script? module1.test() # prints to stdout Thanks! Yes, you can. You need to take control of sys.stdout . Something like this: import sys stdout_ = sys.stdout #Keep track of the previous value. sys.stdout = open('myoutputfile.txt', 'w') # Something here that provides a write method. # calls to print, ie import module1 sys.stdout =