passing arguments into a python script from cmd line or a bash script

Question

simple question.

If I have this line:

      j = json.load(urllib.urlopen("http://ajax.googleapis.com/ajax/services/search/images?v=1.0&q= ***$???*** "))

I'm trying to pass an argument into that spot from another script +/or the command line.

In bash its simple, $1, $2, etc etc.

I've read about (sys.argv[1]) and I'm missing it because such a simple thing in bash seems to need such verbose-ness in python. I've tried this:

      j = json.load(urllib.urlopen("http://ajax.googleapis.com/ajax/services/search/images?v=1.0&q='(sys.argv[1])'"))

To no avail.... What am I not understanding?

Fred Foo · Accepted Answer · 2013-04-04 15:34:21Z

4

Strings are not interpolated by default in Python. Try

("http://ajax.googleapis.com/ajax/services/search/images?v=1.0&q='%s'"
 % sys.argv[1])

answered Apr 4, 2013 at 15:34

Fred Foo

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3 Comments

sirvon Over a year ago

if i had not asked on here... how would i have come upon that tidbit? what's the understand behind that...it worked btw, i'll check it once time is cleared.

Fred Foo Over a year ago

@sirvonandrethomas: the fact that some other languages magically interpolate strings doesn't mean Python should do that. I think % is actually in the tutorial.

Robᵩ Over a year ago

@sirvonandrethomas - docs.python.org/2/tutorial/interpreter.html#argument-passing and docs.python.org/2/tutorial/…

ormaaj · Accepted Answer · 2013-04-06 07:07:22Z

0

Yep, for completeness, there's "new formatting" which is a bit like Java's format strings, and a little nicer to work with.

 $ python -c 'import sys; print("yojo{0}".format(sys.argv[1]))' mo
yojomo

And if you just want to concatenate strings, the + operator is overloaded for that.

print("mystring" + sys.argv[1])

answered Apr 6, 2013 at 7:07

ormaaj

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