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import sys
import time
from subprocess import Popen, PIPE
def magic_pypy(line, cell):
cmd = ['pypy', '-c', cell]
tic = time.time()
p = Popen(cmd, stdout=PIPE, stderr=PIPE)
p.wait()
toc = time.time()
out,err = p.communicate()
if err:
print >> sys.stderr, err
print out
if '-t' in line:
print "time: %.3fs" % (toc - tic)
get_ipython().register_magic_function(magic_pypy, 'cell', 'pypy')
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