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"""Add things to old Pythons so I can pretend they are newer."""
# pylint: disable-msg=W0622
# (Redefining built-in blah)
# The whole point of this file is to redefine built-ins, so shut up about it.
import os, sys
# Python 2.3 doesn't have `set`
try:
set = set # new in 2.4
except NameError:
# (Redefining built-in 'set')
from sets import Set as set
# Python 2.3 doesn't have `sorted`.
try:
sorted = sorted
except NameError:
def sorted(iterable):
"""A 2.3-compatible implementation of `sorted`."""
lst = list(iterable)
lst.sort()
return lst
# Py2k and 3k don't agree on how to run commands in a subprocess.
try:
import subprocess
except ImportError:
def run_command(cmd):
"""Run a command in a subprocess.
Returns the exit code and the combined stdout and stderr.
"""
_, stdouterr = os.popen4(cmd)
return 0, stdouterr.read()
else:
def run_command(cmd):
"""Run a command in a subprocess.
Returns the exit code and the combined stdout and stderr.
"""
if sys.hexversion > 0x03000000 and cmd.startswith("coverage "):
# We don't have a coverage command on 3.x, so fix it up to call the
# script.
cmd = "python " + sys.prefix + os.sep + "Scripts" + os.sep + cmd
proc = subprocess.Popen(cmd, shell=True,
stdin=subprocess.PIPE, stdout=subprocess.PIPE,
stderr=subprocess.STDOUT
)
retcode = proc.wait()
return retcode, proc.stdout.read()
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