[Tutor] a quick Q: how to use for loop to read a series of files with .doc end

[lina]

Still have a reading "multiple" files issue:

Traceback (most recent call last):
  File "counter-vertically-WORKING.py", line 26, in <module>
    results[ch][col]+=1
IndexError: list index out of range

only one file ss_1.xpm was processed and wrote file, for the rest ss_2.xpm,
ss_3.xpm and following keep intact,

any suggestions?

thanks, and sorry for so many questions here,
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