Member Avatar for sritechprasad

Hi,
What is the meaning of the code lines in python. How a single variable like "argv" can be assigned to multiple variables "script and filename".

Python Code:
from sys import argv
script, filename = argv

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  • Latest Post Latest Post by Gribouillis
Member Avatar for Gribouillis

The definition of the assignment statement is click here in the docs. As you can see, the left part of it can be a sequence of targets separated by commas. In this case, the right side must be a sequence of expression matching the left side. For example, the left side can be a sequence of identifiers (names) as in

>>> u, v, w = [1, 2, 3]

or something more complicated, such as

>>> x, ((y, z), t) = [1, ([2,3], 4)]
>>> x, y, z, t
(1, 2, 3, 4)

or even, in recent versions of python:

>>> x, *foo, y = (1, 2, 3, 4, 5, 6)
>>> foo
[2, 3, 4, 5]

In your case, the program works if the script is invoked with a single argument (the filename).

Edited by Gribouillis
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