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impossible to exit from the file - sylas - Sep-11-2018 Hi all ! This file works well, unless I try to exit. Look please at lines 17,18, 19. I am on Linux. Python 3.7. import tty, sys, termios class ReadChar(): def __enter__(self): self.fd = sys.stdin.fileno() self.old_settings = termios.tcgetattr(self.fd) tty.setraw(sys.stdin.fileno()) return sys.stdin.read(1) def __exit__(self, type, value, traceback): termios.tcsetattr(self.fd, termios.TCSADRAIN, self.old_settings) def test(): while True: with ReadChar() as rc: char = rc #if ord(char) == 3: # sys.exit() #elif ord(char) <= 32: if ord(char) <= 32: print("You entered character with ordinal {}."\ .format(ord(char))) else: print("You entered character '{}'."\ .format(char)) #if char in "^C^D": # sys.exit() if __name__ == "__main__": test()If I uncomment lines 17, 18, I have the following error:
RE: impossible to exit from the file - sylas - Sep-11-2018 Error message was incomplete:
RE: impossible to exit from the file - volcano63 - Sep-12-2018 (Sep-11-2018, 09:14 AM)sylas Wrote: The message is clear - you mixed tabs and spaces in your code. You should never do that RE: impossible to exit from the file - sylas - Sep-13-2018 @volcano It is not first time I notice interpreter tells nonsense. Please try yourself, and you will see that it is impossible to exit. Thanks for your reply. RE: impossible to exit from the file - buran - Sep-13-2018 (Sep-13-2018, 06:38 AM)sylas Wrote: It is not first time I notice interpreter tells nonsense.Please, let be serious... message is clear - you mix tabs and space for indentation. fix that and it will work if there is no other problems. RE: impossible to exit from the file - volcano63 - Sep-13-2018 (Sep-13-2018, 06:38 AM)sylas Wrote: @volcano It is not first time I notice interpreter tells nonsense. Please try yourself, and you will see that it is impossible to exit. Thanks for your reply. Unclear - maybe; nonsense - in my 6 years in Python I have never noticed (from interpreter ) RE: impossible to exit from the file - DeaD_EyE - Sep-13-2018 It was introduced with Python 3. If you are mixing tabs with white space, your program won't run. They changed it, because before it was a bit confusing. We don't need to try it out, because we know this. I run often into this issue until I changed my tool set. Just use an IDE/text editor, which converts Tab-Stops into 4 white spaces. RE: impossible to exit from the file - volcano63 - Sep-13-2018 (Sep-13-2018, 10:39 AM)DeaD_EyE Wrote: It was introduced with Python 3. Good call on the part of Python development community - was not aware of that. (Well, I never use tabs) I had my share of inherited code with a mixture of tabs and spaces - that was major PITA. RE: impossible to exit from the file - sylas - Sep-13-2018 Instead of tabs I used spaces. At the second trial it works well. Surprising !! |