我们从Python开源项目中，提取了以下9个代码示例，用于说明如何使用subprocess.py()。
def test_Popen_defaults(self): results = self._fake_subprocess_Popen() proc = subprocess2.Popen(['foo'], a=True) # Cleanup code in subprocess.py needs this member to be set. # pylint: disable=attribute-defined-outside-init proc._child_created = None expected = { 'args': ['foo'], 'a': True, 'shell': bool(sys.platform=='win32'), } if sys.platform != 'win32': env = os.environ.copy() is_english = lambda name: env.get(name, 'en').startswith('en') if not is_english('LANG'): env['LANG'] = 'en_US.UTF-8' expected['env'] = env if not is_english('LANGUAGE'): env['LANGUAGE'] = 'en_US.UTF-8' expected['env'] = env self.assertEquals(expected, results) self.assertTrue(time.time() >= proc.start)
def install_activate(home_dir, bin_dir, prompt=None): if sys.platform == 'win32' or is_jython and os._name == 'nt': files = {'activate.bat': ACTIVATE_BAT, 'deactivate.bat': DEACTIVATE_BAT} if os.environ.get('OS') == 'Windows_NT' and os.environ.get('OSTYPE') == 'cygwin': files['activate'] = ACTIVATE_SH else: files = {'activate': ACTIVATE_SH} # suppling activate.fish in addition to, not instead of, the # bash script support. files['activate.fish'] = ACTIVATE_FISH # same for csh/tcsh support... files['activate.csh'] = ACTIVATE_CSH files['activate_this.py'] = ACTIVATE_THIS home_dir = os.path.abspath(home_dir) if hasattr(home_dir, 'decode'): home_dir = home_dir.decode(sys.getfilesystemencoding()) vname = os.path.basename(home_dir) for name, content in files.items(): content = content.replace('__VIRTUAL_PROMPT__', prompt or '') content = content.replace('__VIRTUAL_WINPROMPT__', prompt or '(%s)' % vname) content = content.replace('__VIRTUAL_ENV__', home_dir) content = content.replace('__VIRTUAL_NAME__', vname) content = content.replace('__BIN_NAME__', os.path.basename(bin_dir)) writefile(os.path.join(bin_dir, name), content)
def install_distutils(home_dir): distutils_path = change_prefix(distutils.__path__[0], home_dir) mkdir(distutils_path) ## FIXME: maybe this prefix setting should only be put in place if ## there's a local distutils.cfg with a prefix setting? home_dir = os.path.abspath(home_dir) ## FIXME: this is breaking things, removing for now: #distutils_cfg = DISTUTILS_CFG + "\n[install]\nprefix=%s\n" % home_dir writefile(os.path.join(distutils_path, '__init__.py'), DISTUTILS_INIT) writefile(os.path.join(distutils_path, 'distutils.cfg'), DISTUTILS_CFG, overwrite=False)
def make_environment_relocatable(home_dir): """ Makes the already-existing environment use relative paths, and takes out the #!-based environment selection in scripts. """ home_dir, lib_dir, inc_dir, bin_dir = path_locations(home_dir) activate_this = os.path.join(bin_dir, 'activate_this.py') if not os.path.exists(activate_this): logger.fatal( 'The environment doesn\'t have a file %s -- please re-run virtualenv ' 'on this environment to update it' % activate_this) fixup_scripts(home_dir) fixup_pth_and_egg_link(home_dir) ## FIXME: need to fix up distutils.cfg
def fixup_scripts(home_dir): # This is what we expect at the top of scripts: shebang = '#!%s/bin/python' % os.path.normcase(os.path.abspath(home_dir)) # This is what we'll put: new_shebang = '#!/usr/bin/env python%s' % sys.version[:3] activate = "import os; activate_this=os.path.join(os.path.dirname(__file__), 'activate_this.py'); execfile(activate_this, dict(__file__=activate_this)); del os, activate_this" if sys.platform == 'win32': bin_suffix = 'Scripts' else: bin_suffix = 'bin' bin_dir = os.path.join(home_dir, bin_suffix) home_dir, lib_dir, inc_dir, bin_dir = path_locations(home_dir) for filename in os.listdir(bin_dir): filename = os.path.join(bin_dir, filename) if not os.path.isfile(filename): # ignore subdirs, e.g. .svn ones. continue f = open(filename, 'rb') lines = f.readlines() f.close() if not lines: logger.warn('Script %s is an empty file' % filename) continue if not lines[0].strip().startswith(shebang): if os.path.basename(filename) in OK_ABS_SCRIPTS: logger.debug('Cannot make script %s relative' % filename) elif lines[0].strip() == new_shebang: logger.info('Script %s has already been made relative' % filename) else: logger.warn('Script %s cannot be made relative (it\'s not a normal script that starts with %s)' % (filename, shebang)) continue logger.notify('Making script %s relative' % filename) lines = [new_shebang+'\n', activate+'\n'] + lines[1:] f = open(filename, 'wb') f.writelines(lines) f.close()
def check_output(*popenargs, **kwargs): """ For Python 2.6 compatibility. Taken from https://hg.python.org/cpython/file/d37f963394aa/Lib/subprocess.py#l544 Run command with arguments and return its output as a byte string. If the exit code was non-zero it raises a CalledProcessError. The CalledProcessError object will have the return code in the returncode attribute and output in the output attribute. The arguments are the same as for the Popen constructor. Example: >>> check_output(["ls", "-l", "/dev/null"]) 'crw-rw-rw- 1 root root 1, 3 Oct 18 2007 /dev/null\n' The stdout argument is not allowed as it is used internally. To capture standard error in the result, use stderr=STDOUT. >>> check_output(["/bin/sh", "-c", ... "ls -l non_existent_file ; exit 0"], ... stderr=STDOUT) 'ls: non_existent_file: No such file or directory\n' """ #if sys.version_info.major > 2 or sys.version_info.minor >= 7: # return subprocess.check_output(*popenargs, **kwargs) if 'stdout' in kwargs: raise ValueError('stdout argument not allowed, it will be overridden.') process = subprocess.Popen(stdout=subprocess.PIPE, *popenargs, **kwargs) output, unused_err = process.communicate() retcode = process.poll() if retcode: cmd = kwargs.get("args") if cmd is None: cmd = popenargs[0] raise RuntimeError("Program failed to run. Retcode: %d. Cmd: %s" % (retcode, cmd)) return output
def install_pip(py_executable, search_dirs=None, never_download=False): if search_dirs is None: search_dirs = file_search_dirs() filenames = [] for dir in search_dirs: filenames.extend([join(dir, fn) for fn in os.listdir(dir) if _pip_re.search(fn)]) filenames = [(os.path.basename(filename).lower(), i, filename) for i, filename in enumerate(filenames)] filenames.sort() filenames = [filename for basename, i, filename in filenames] if not filenames: filename = 'pip' else: filename = filenames[-1] easy_install_script = 'easy_install' if sys.platform == 'win32': easy_install_script = 'easy_install-script.py' cmd = [join(os.path.dirname(py_executable), easy_install_script), filename] if sys.platform == 'win32': cmd.insert(0, py_executable) if filename == 'pip': if never_download: logger.fatal("Can't find any local distributions of pip to install " "and --never-download is set. Either re-run virtualenv " "without the --never-download option, or place a pip " "source distribution (zip/tar.gz/tar.bz2) in one of these " "locations: %r" % search_dirs) sys.exit(1) logger.info('Installing pip from network...') else: logger.info('Installing existing %s distribution: %s' % ( os.path.basename(filename), filename)) logger.start_progress('Installing pip...') logger.indent += 2 def _filter_setup(line): return filter_ez_setup(line, 'pip') try: call_subprocess(cmd, show_stdout=False, filter_stdout=_filter_setup) finally: logger.indent -= 2 logger.end_progress()
