Python os.error方法代码示例

# 需要导入模块: import os [as 别名]
# 或者: from os import error [as 别名]
def walk(self, top, followlinks=False, sep=None):
        """A simplified version of os.walk (code copied) that uses
        ``self.listdir``, and the other local filesystem methods.

        Because we don't care about file/directory distinctions, only
        a single list is returned.
        """
        try:
            names = self.listdir(top)
        except os.error as err:
            return

        items = []
        for name in names:
            items.append(name)

        yield top, items

        for name in items:
            new_path = _join_paths([top, name], sep=sep)
            if followlinks or not self.islink(new_path):
                for x in self.walk(new_path, followlinks):
                    yield x 

# 需要导入模块: import os [as 别名]
# 或者: from os import error [as 别名]
def removedirs(name):
    """removedirs(path)

    Super-rmdir; remove a leaf directory and all empty intermediate
    ones.  Works like rmdir except that, if the leaf directory is
    successfully removed, directories corresponding to rightmost path
    segments will be pruned away until either the whole path is
    consumed or an error occurs.  Errors during this latter phase are
    ignored -- they generally mean that a directory was not empty.

    """
    rmdir(name)
    head, tail = path.split(name)
    if not tail:
        head, tail = path.split(head)
    while head and tail:
        try:
            rmdir(head)
        except error:
            break
        head, tail = path.split(head) 

# 需要导入模块: import os [as 别名]
# 或者: from os import error [as 别名]
def renames(old, new):
    """renames(old, new)

    Super-rename; create directories as necessary and delete any left
    empty.  Works like rename, except creation of any intermediate
    directories needed to make the new pathname good is attempted
    first.  After the rename, directories corresponding to rightmost
    path segments of the old name will be pruned way until either the
    whole path is consumed or a nonempty directory is found.

    Note: this function can fail with the new directory structure made
    if you lack permissions needed to unlink the leaf directory or
    file.

    """
    head, tail = path.split(new)
    if head and tail and not path.exists(head):
        makedirs(head)
    rename(old, new)
    head, tail = path.split(old)
    if head and tail:
        try:
            removedirs(head)
        except error:
            pass 

# 需要导入模块: import os [as 别名]
# 或者: from os import error [as 别名]
def _internal_poll(self, _deadstate=None, _waitpid=os.waitpid,
                _WNOHANG=os.WNOHANG, _os_error=os.error, _ECHILD=errno.ECHILD):
            """Check if child process has terminated.  Returns returncode
            attribute.

            This method is called by __del__, so it cannot reference anything
            outside of the local scope (nor can any methods it calls).

            """
            if self.returncode is None:
                try:
                    pid, sts = _waitpid(self.pid, _WNOHANG)
                    if pid == self.pid:
                        self._handle_exitstatus(sts)
                except _os_error as e:
                    if _deadstate is not None:
                        self.returncode = _deadstate
                    elif e.errno == _ECHILD:
                        # This happens if SIGCLD is set to be ignored or
                        # waiting for child processes has otherwise been
                        # disabled for our process.  This child is dead, we
                        # can't get the status.
                        # http://bugs.python.org/issue15756
                        self.returncode = 0
            return self.returncode 

# 需要导入模块: import os [as 别名]
# 或者: from os import error [as 别名]
def checkcache(filename=None):
    """Discard cache entries that are out of date.
    (This is not checked upon each call!)"""

    if filename is None:
        filenames = list(cache.keys())
    else:
        if filename in cache:
            filenames = [filename]
        else:
            return

    for filename in filenames:
        size, mtime, lines, fullname = cache[filename]
        if mtime is None:
            continue   # no-op for files loaded via a __loader__
        try:
            stat = os.stat(fullname)
        except os.error:
            del cache[filename]
            continue
        if size != stat.st_size or mtime != stat.st_mtime:
            del cache[filename] 

# 需要导入模块: import os [as 别名]
# 或者: from os import error [as 别名]
def _syscmd_uname(option,default=''):

    """ Interface to the system's uname command.
    """
    if sys.platform in ('dos','win32','win16','os2'):
        # XXX Others too ?
        return default
    try:
        f = os.popen('uname %s 2> %s' % (option, DEV_NULL))
    except (AttributeError,os.error):
        return default
    output = f.read().strip()
    rc = f.close()
    if not output or rc:
        return default
    else:
        return output 

# 需要导入模块: import os [as 别名]
# 或者: from os import error [as 别名]
def _handle_request_noblock(self):
        """Handle one request, without blocking.

        I assume that select.select has returned that the socket is
        readable before this function was called, so there should be
        no risk of blocking in get_request().
        """
        try:
            request, client_address = self.get_request()
        except socket.error:
            return
        if self.verify_request(request, client_address):
            try:
                self.process_request(request, client_address)
            except:
                self.handle_error(request, client_address)
                self.shutdown_request(request) 

# 需要导入模块: import os [as 别名]
# 或者: from os import error [as 别名]
def add(self):
        try:
            params = self._prepare_request()
        except Exception:
            LOG.exception('Exception when reading CNI params.')
            return '', httplib.BAD_REQUEST, self.headers

        try:
            vif = self.plugin.add(params)
            data = jsonutils.dumps(vif.obj_to_primitive())
        except exception.ResourceNotReady:
            LOG.error('Error when processing addNetwork request')
            return '', httplib.GATEWAY_TIMEOUT, self.headers
        except Exception:
            LOG.exception('Error when processing addNetwork request. CNI '
                          'Params: %s', params)
            return '', httplib.INTERNAL_SERVER_ERROR, self.headers

        return data, httplib.ACCEPTED, self.headers 

# 需要导入模块: import os [as 别名]
# 或者: from os import error [as 别名]
def delete(self):
        try:
            params = self._prepare_request()
        except Exception:
            LOG.exception('Exception when reading CNI params.')
            return '', httplib.BAD_REQUEST, self.headers

        try:
            self.plugin.delete(params)
        except exception.ResourceNotReady:
            # NOTE(dulek): It's better to ignore this error - most of the time
            #              it will happen when capsule is long gone and runtime
            #              overzealously tries to delete it from the network.
            #              We cannot really do anything without VIF metadata,
            #              so let's just tell runtime to move along.
            LOG.warning('Error when processing delNetwork request. '
                        'Ignoring this error, capsule is most likely gone')
            return '', httplib.NO_CONTENT, self.headers
        except Exception:
            LOG.exception('Error when processing delNetwork request. CNI '
                          'Params: %s.', params)
            return '', httplib.INTERNAL_SERVER_ERROR, self.headers
        return '', httplib.NO_CONTENT, self.headers 

# 需要导入模块: import os [as 别名]
# 或者: from os import error [as 别名]
def _zombie_reaper(self):
        while True:
            try:
                res = os.waitpid(-1, os.WNOHANG)
                # don't sleep or stop if a zombie process was found
                # as there could be more
                if res != (0, 0):
                    continue
            except ChildProcessError:
                # There are no child processes yet (or they have been killed)
                pass
            except os.error:
                LOG.exception("Got OS error while reaping zombie processes")
            if self._terminate_called.isSet():
                break
            time.sleep(1) 

# 需要导入模块: import os [as 别名]
# 或者: from os import error [as 别名]
def write_file(self, new_text, filename, old_text, encoding=None):
        """Writes a string to a file.

        It first shows a unified diff between the old text and the new text, and
        then rewrites the file; the latter is only done if the write option is
        set.
        """
        try:
            f = _open_with_encoding(filename, "w", encoding=encoding)
        except os.error as err:
            self.log_error("Can't create %s: %s", filename, err)
            return
        try:
            f.write(_to_system_newlines(new_text))
        except os.error as err:
            self.log_error("Can't write %s: %s", filename, err)
        finally:
            f.close()
        self.log_debug("Wrote changes to %s", filename)
        self.wrote = True 

# 需要导入模块: import os [as 别名]
# 或者: from os import error [as 别名]
def summarize(self):
        if self.wrote:
            were = "were"
        else:
            were = "need to be"
        if not self.files:
            self.log_message("No files %s modified.", were)
        else:
            self.log_message("Files that %s modified:", were)
            for file in self.files:
                self.log_message(file)
        if self.fixer_log:
            self.log_message("Warnings/messages while refactoring:")
            for message in self.fixer_log:
                self.log_message(message)
        if self.errors:
            if len(self.errors) == 1:
                self.log_message("There was 1 error:")
            else:
                self.log_message("There were %d errors:", len(self.errors))
            for msg, args, kwds in self.errors:
                self.log_message(msg, *args, **kwds) 

# 需要导入模块: import os [as 别名]
# 或者: from os import error [as 别名]
def handle_expect_100(self):
        """Decide what to do with an "Expect: 100-continue" header.

        If the client is expecting a 100 Continue response, we must
        respond with either a 100 Continue or a final response before
        waiting for the request body. The default is to always respond
        with a 100 Continue. You can behave differently (for example,
        reject unauthorized requests) by overriding this method.

        This method should either return True (possibly after sending
        a 100 Continue response) or send an error response and return
        False.

        """
        self.send_response_only(100)
        self.flush_headers()
        return True 

# 需要导入模块: import os [as 别名]
# 或者: from os import error [as 别名]
def add(self):
        try:
            params = self._prepare_request()
        except Exception:
            self._check_failure()
            LOG.exception('Exception when reading CNI params.')
            return '', httplib.BAD_REQUEST, self.headers

        try:
            vif = self.plugin.add(params)
            data = jsonutils.dumps(vif.obj_to_primitive())
        except exceptions.ResourceNotReady:
            self._check_failure()
            LOG.error('Error when processing addNetwork request')
            return '', httplib.GATEWAY_TIMEOUT, self.headers
        except Exception:
            self._check_failure()
            LOG.exception('Error when processing addNetwork request. CNI '
                          'Params: %s', params)
            return '', httplib.INTERNAL_SERVER_ERROR, self.headers

        return data, httplib.ACCEPTED, self.headers 

# 需要导入模块: import os [as 别名]
# 或者: from os import error [as 别名]
def delete(self):
        try:
            params = self._prepare_request()
        except Exception:
            LOG.exception('Exception when reading CNI params.')
            return '', httplib.BAD_REQUEST, self.headers

        try:
            self.plugin.delete(params)
        except exceptions.ResourceNotReady:
            # NOTE(dulek): It's better to ignore this error - most of the time
            #              it will happen when pod is long gone and CRI
            #              overzealously tries to delete it from the network.
            #              We cannot really do anything without VIF annotation,
            #              so let's just tell CRI to move along.
            LOG.warning('Error when processing delNetwork request. '
                        'Ignoring this error, pod is most likely gone')
            return '', httplib.NO_CONTENT, self.headers
        except Exception:
            self._check_failure()
            LOG.exception('Error when processing delNetwork request. CNI '
                          'Params: %s.', params)
            return '', httplib.INTERNAL_SERVER_ERROR, self.headers
        return '', httplib.NO_CONTENT, self.headers