Here's the bash script I am working on:

i/p: ls *.py
o/p: List of output files with .py extension

1.How do I know the number "n" of the .py files?
2.Then pump files one by one into the program to do further processing?


I'd use an array:

# get the files

# list the files
printf "%s\n" "${files[@]}"

# count the files

# iterate over the files
for file in "${files[@]}"; do
    someCommand "$file"
# or, if you want the index for some reason
for ((i=0; i < n; i++)); do
    echo "$i: ${files[i]}"

bash arrays tutorial here

  • 2
    +1, this is the way to go. You may want to be explicit on the use of shopt -s nullglob to cover the case where no files exist – iruvar Jun 22 '13 at 20:45

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