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py/_process/cmdexec.py
49 строк
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holger krekel
remove unused imports
02 окт 2013, 16:36
02 окт 2013, 16:36
0a1c4e8
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import sys import subprocess import py from subprocess import Popen, PIPE def cmdexec(cmd): """ return unicode output of executing 'cmd' in a separate process. raise cmdexec.Error exeception if the command failed. the exception will provide an 'err' attribute containing the error-output from the command. if the subprocess module does not provide a proper encoding/unicode strings sys.getdefaultencoding() will be used, if that does not exist, 'UTF-8'. """ process = subprocess.Popen(cmd, shell=True, universal_newlines=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE) out, err = process.communicate() if sys.version_info[0] < 3: # on py3 we get unicode strings, on py2 not try: default_encoding = sys.getdefaultencoding() # jython may not have it except AttributeError: default_encoding = sys.stdout.encoding or 'UTF-8' out = unicode(out, process.stdout.encoding or default_encoding) err = unicode(err, process.stderr.encoding or default_encoding) status = process.poll() if status: raise ExecutionFailed(status, status, cmd, out, err) return out class ExecutionFailed(py.error.Error): def __init__(self, status, systemstatus, cmd, out, err): Exception.__init__(self) self.status = status self.systemstatus = systemstatus self.cmd = cmd self.err = err self.out = out def __str__(self): return "ExecutionFailed: %d %s\n%s" %(self.status, self.cmd, self.err) # export the exception under the name 'py.process.cmdexec.Error' cmdexec.Error = ExecutionFailed try: ExecutionFailed.__module__ = 'py.process.cmdexec' ExecutionFailed.__name__ = 'Error' except (AttributeError, TypeError): pass