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:
Error:
sylvain@sylvain-HP-Laptop-15-bw0xx:~$ python get2.py
File "get2.py", line 18
sys.exit()
^
Error message was incomplete:
Error:
File "get2.py", line 18
sys.exit()
^
TabError: inconsistent use of tabs and spaces in indentation
(Sep-11-2018, 09:14 AM)sylas Wrote: [ -> ]Error:
File "get2.py", line 18
sys.exit()
^
TabError: inconsistent use of tabs and spaces in indentation
The message is clear - you mixed tabs and spaces in your code.
You should never do that
@
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.
(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.
(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
)
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.
(Sep-13-2018, 10:39 AM)DeaD_EyE Wrote: [ -> ]It was introduced with Python 3.
If you are mixing tabs with white space, your program won't run.
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.
Instead of tabs I used spaces. At the second trial it works well. Surprising !!