WHAT is [0] in subprocess.Popen(blah).communicate()[0]

[Fredrik Lundh]

Gabriel Genellina wrote:


>> I like using pattern matching in these simple cases:
>>
>>   last_line, _ = subprocess.Popen([r"tail","-n 1", "x.txt"],
>>           stdout=subprocess.PIPE).communicate()
> 
> pattern matching???

http://www.haskell.org/tutorial/patterns.html

(the syntax's called "target lists" in Python)

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