Input and Ouput =============== Snippets about input and output. `read from stdin`_ ------------------ :: import sys for line in sys.stdin: print line `print to stderr`_ ------------------ :: print >> sys.stderr, 'spam' .. _read from stdin: http://stackoverflow.com/questions/1450393/how-do-you-read-from-stdin-in-python .. _print to stderr: http://stackoverflow.com/questions/5574702/how-to-print-to-stderr-in-python