Tested & verified powerful python oneliners
1. Reverse the words in odd position of a string and maintain the title cases for the reversed words. python -c "for p in [word[::-1].title() if index % 2==0 else word for index,word in enumerate('A Quick Lazy Dogs Jumps Over The Fox'.split()) ]: print p," 2. Print only the lines of a file whose 3rd field is either of '123','234','245'. python -c "for p in [ line.strip('\n') for line in open('file.txt').readlines() if int(line.split(',')[2]) in [123,234,245] ]: print p" --------------OR------------------ cat file.txt | python -c "import sys; [sys.stdout.write(line) for line in sys.stdin if int(line.split(',')[2]) in [ 123,234,245 ] ]" 3. Print all the unique words in a file. python -c "for p in set(word for line in open('file.txt').readlines() for word in line.strip('\n').split(',')): print p, " 4. Awk equivalent: pr