Using && in subprocess.Popen for command chaining?

Question

I'm using `subprocess.Popen` with `Python`, and I haven't come across an elegant solution for joining commands (i.e. foobar`&&` bizbang) via `Popen`. I could do this: ``` p1 = subprocess.Popen(["mmls", "WinXP.E01"], stdout=subprocess.PIPE) result = p1.communicate()[0].split("
") for line in result: script_log.write(line) script_log.write("
") p1 = subprocess.Popen(["stat", "WinXP.E01"], stdout=subprocess.PIPE) result = p1.communicate()[0].split("
") for line in result: script_log.write(line) ``` But that really isn't very aesthetically pleasing (especially if I'm daisy-chaining multiple commands via `Popen`. I'd like to replicate this output in as few command blocks as possible. ``` not@work ~/ESI/lab3/images $ mmls WinXP.E01 && echo -e "
" && stat WinXP.E01 DOS Partition Table Offset Sector: 0 Units are in 512-byte sectors Slot Start End Length Description 00: Meta 0000000000 0000000000 0000000001 Primary Table (#0) 01: ----- 0000000000 0000000062 0000000063 Unallocated 02: 00:00…

Accepted Answer

`&&` is a shell operator, `Popen` does not use a shell by default.

If you want to use shell functionality use `shell=True` in your `Popen` call, but be aware that it is slightly slower/more memory intensive.

```
p1 = subprocess.Popen(["mmls", "WinXP.E01", "&&", "echo", "-e", ""
"", "&&", "stat", "WinXP.E01"],
                      stdout=subprocess.PIPE, shell=True)
```

Using && in subprocess.Popen for command chaining?

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