[hollerith]

The Python code Kragen gave is more characters to type, but fewer footguns.

Shell scripts are much higher in footguns per character than most programming languages.

It is possible for a coder to understand bash so well that he never shoots his own foot off, but it requires more learning hours than the same feat in another language requires, and unless I've also put in the (many) learning hours, I have no way of knowing whether a shell script written by someone I don't know contains security vulnerabilities or fragility when dealing with unusual inputs that will surface in unpredictable circumstances.

The traditional Unix shell might be the most overrated tool on HN.

[oguz-ismail]

> The Python code Kragen gave is more characters to type, but fewer footguns.

What are the footguns in this?

    df | grep /$

[hollerith]

There are none AFAIK.

Allow me to correct my previous comment: using Python's os.spawnlp or Popen to invoke Unix commands has fewer footguns than using the shell. (Kragen's code only addresses your question of how to set up a pipeline in Python.)