On Fri, 30 Aug 2019 01:29:48 +0200, Peter Otten wrote:
> Perhaps a simple example can help?
>
> $ cat checktty.py import sys
>
> stream = sys.stdout
>
> if stream.isatty():
> message = "tty"
> else:
> message = "no tty"
> print(message, file=stream)
>
> When you run the script it prints to the terminal:
>
> $ python3 checktty.py tty
>
> But when you redirect to a pipe or into a file:
>
> $ python3 checktty.py | cat no tty
>
> $ python3 checktty.py > tmp.txt $ cat tmp.txt no tty
But, see my example:
$ cat check-isatty.py
import sys
import time
if sys.stderr.isatty():
p = 'tty ' + '\r'
else:
p = 'no tty ' + '\n'
sys.stderr.write(p)
sys.stderr.flush()
time.sleep(1.0)
I run both of the following commands:
$ python check-isatty.py
$ python check-isatty.py | cat
Both will output `tty'. So still I cannot figure out the issue.
Regards
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