Python open a named pipe == hanging?

[Donn Cave]

In article <op.tdrmzdd1h12lye at cadet.mshome.net>,
 Rochester <rochester1976 at gmail.com> wrote:

> Thank you for your advise.  So, it turns out that fifos are quite useless  
> in Python programming then, which is quite disappointing to me :-(
> 
> I am not saying that I _have to_ use fifo, afterall it is a rather odd  
> thingy not in fasion since the last iceage... I am just disappointed by  
> the fact that the old plain Bash seems to excel Python in this special  
> aspect.

Not by a very great margin, but it is indeed very convenient
for process creation and redirection, so when that's the
nature of the task, it's likely the right choice.

> I am new to Python and much more comfortable in Bash programming.  A  
> simple Bash script like this would take the advantage of a fifo, hence  
> reduce the overhead of unneccesarry temporary files creation:
> 
> #!/bin/bash
> 
> mkfifo my_fifo
> echo "this is a string in my fifo!" > my_fifo &
> cat my_fifo
> rm my_fifo
> 
> Isn't it neat?

If you like it, good for you.  Do you understand why it
works, when your Python one didn't?  You put the output
in a background process;  did it occur to you to try that
in Python?

> Anyway, I think every scripting language has its pros and cons.  Bash is  
> probably more flexible in dealing with fifos and multiway pipes (through  
> the magic menchanism of process substitution).

Multiway pipes?

   Donn Cave, donn at u.washington.edu