how to iterate in a string in python?

Question

I want to make some montage in ImageMagick which is called by Python via os.system() with 100 jpegs files.

Here's the command:

cmd='montage '+file[i]+' '+file[i+1]+' '+file[i+2]+' '+file[u+3]+'     +file[i+4]+'...+file[i+99]

I would like to know how could I avoid to write all file[i+x] entries. Is this possible?

cmd = "montage " + " ".join(files) Assuming all your filenames are in 'file' — kezzos
– kezzos, Commented Sep 26, 2016 at 8:04
Use subprocess() instead. os.system() is really, really outdated. Proposed depricated. — Jacob Vlijm
– Jacob Vlijm, Commented Sep 26, 2016 at 8:22

UltraInstinct · Accepted Answer · 2016-09-26 08:05:15Z

5

To join 100 strings with a space starting at ith index:

cmd = "montage " + " ".join(file[i:i+100])

.. where file[i:i+100] will return a sub-sequence starting at i, and ending at (i + 100 - 1)

answered Sep 26, 2016 at 8:05

UltraInstinct

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1 Comment

Downvoted before you added the first explanation, just one line of code is not enough for a good answer for me. Now it's good