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"""This module contains a code example related to

Think Python, 2nd Edition

by Allen Downey

http://thinkpython2.com

Copyright 2015 Allen Downey

License: http://creativecommons.org/licenses/by/4.0/

"""

from __future__ import print_function, division

import os

def pipe(cmd):

"""Runs a command in a subprocess.

cmd: string Unix command

Returns (res, stat), the output of the subprocess and the exit status.

"""

# Note: os.popen is deprecated

# now, which means we are supposed to stop using it and start using

# the subprocess module. But for simple cases, I find

# subprocess more complicated than necessary. So I am going

# to keep using os.popen until they take it away.

fp = os.popen(cmd)

res = fp.read()

stat = fp.close()

assert stat is None

return res, stat

filenames = """

ackermann_memo.py grid.py PokerHand.py

ackermann.py has_duplicates.py PokerHandSoln.py

anagram_db.py header.py polygon.py

anagram_sets.py inlist.py reducible.py

analyze_book1.py interlock.py reverse_pair.py

analyze_book2.py invert_dict.py rotate_pairs.py

analyze_book3.py koch.py rotate.py

BadKangaroo.py letters.py sed.py

birthday.py Map.py spiral.py

Card.py markov.py structshape.py

cartalk1.py Markov.py Time1.py

cartalk2.py metathesis.py Time1_soln.py

cartalk3.py most_frequent.py Time2.py

do_four.py pace_calc.py Time2_soln.py

palindrome_soln.py typewriter.py

find_duplicates_copy.py pie.py unstable_sort.py

find_duplicates.py pi.py walk.py

flower.py Point1.py wordlist.py

GoodKangaroo.py Point1_soln.py zipf.py

"""

slow_ones = """

spiral.py typewriter.py pie.py

flower.py wordlist.py polygon.py

koch.py letters.py zipf.py

""".split()

for filename in filenames.split():

print(filename)

if filename in slow_ones:

print('Skipping')

continue

res, stat = pipe('python ' + filename)

print(stat)