How to use exec_on_interpreter method in tox

Best Python code snippet using tox_python

interpreters.py

Source:interpreters.py

...38        if not info.executable:39            return ""40        envdir = str(envdir)41        try:42            res = exec_on_interpreter(info.executable,43                [inspect.getsource(sitepackagesdir),44                 "print (sitepackagesdir(%r))" % envdir])45        except ExecFailed:46            val = sys.exc_info()[1]47            print ("execution failed: %s -- %s" %(val.out, val.err))48            return ""49        else:50            return res["dir"]51def run_and_get_interpreter_info(name, executable):52    assert executable53    try:54        result = exec_on_interpreter(executable,55            [inspect.getsource(pyinfo), "print (pyinfo())"])56    except ExecFailed:57        val = sys.exc_info()[1]58        return NoInterpreterInfo(name, executable=val.executable,59                                 out=val.out, err=val.err)60    else:61        return InterpreterInfo(name, executable, **result)62def exec_on_interpreter(executable, source):63    if isinstance(source, list):64        source = "\n".join(source)65    from subprocess import Popen, PIPE66    args = [str(executable)]67    popen = Popen(args, stdin=PIPE, stdout=PIPE, stderr=PIPE)68    popen.stdin.write(source.encode("utf8"))69    out, err = popen.communicate()70    if popen.returncode:71        raise ExecFailed(executable, source, out, err)72    try:73        result = eval(out.strip())74    except Exception:75        raise ExecFailed(executable, source, out,76                         "could not decode %r" % out)...

__init__.py

Source:__init__.py

...37        if not info.executable:38            return ""39        envdir = str(envdir)40        try:41            res = exec_on_interpreter(str(info.executable), SITE_PACKAGE_QUERY_SCRIPT, str(envdir))42        except ExecFailed as e:43            reporter.verbosity1("execution failed: {} -- {}".format(e.out, e.err))44            return ""45        else:46            return res["dir"]47def run_and_get_interpreter_info(name, executable):48    assert executable49    try:50        result = exec_on_interpreter(str(executable), VERSION_QUERY_SCRIPT)51        result["version_info"] = tuple(result["version_info"])  # fix json dump transformation52        del result["name"]53        del result["version"]54        result["executable"] = str(executable)55    except ExecFailed as e:56        return NoInterpreterInfo(name, executable=e.executable, out=e.out, err=e.err)57    else:58        return InterpreterInfo(name, **result)59def exec_on_interpreter(*args):60    from subprocess import Popen, PIPE61    popen = Popen(args, stdout=PIPE, stderr=PIPE, universal_newlines=True)62    out, err = popen.communicate()63    if popen.returncode:64        raise ExecFailed(args[0], args[1:], out, err)65    if err:66        sys.stderr.write(err)67    try:68        result = json.loads(out)69    except Exception:70        raise ExecFailed(args[0], args[1:], out, "could not decode {!r}".format(out))71    return result72class ExecFailed(Exception):73    def __init__(self, executable, source, out, err):...

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