(executable, path=None)
Tries to find 'executable' in the directories listed in 'path'.

    A string listing directories separated by 'os.pathsep'; defaults to
    os.environ['PATH'].  Returns the complete filename or None if not found.
Tries to find 'executable' in the directories listed in 'path'.
Tries to find executable in the directories listed in path .
def _find_executable(executable, path=None):
    """Tries to find 'executable' in the directories listed in 'path'.

    A string listing directories separated by 'os.pathsep'; defaults to
    os.environ['PATH'].  Returns the complete filename or None if not found.
    """
    if path is None:
        path = os.environ['PATH']

    paths = path.split(os.pathsep)
    base, ext = os.path.splitext(executable)

    if (sys.platform == 'win32') and (ext != '.exe'):
        executable = executable + '.exe'

    if not os.path.isfile(executable):
        for p in paths:
            f = os.path.join(p, executable)
            if os.path.isfile(f):
                # the file exists, we have a shot at spawn working
                return f
        return None
    else:
        return executable
def _find_executable ( executable , path = None ) : if path is None : path = os . environ [ 'PATH' ] paths = path . split ( os . pathsep ) base , ext = os . path . splitext ( executable ) if ( sys . platform == 'win32' ) and ( ext != '.exe' ) : executable = executable + '.exe' if not os . path . isfile ( executable ) : for p in paths : f = os . path . join ( p , executable ) if os . path . isfile ( f ) : # the file exists, we have a shot at spawn working return f return None else : return executable