如何通过python和dbus创建systemd瞬态计时器和服务（systemd运行方式）？

我想启动一个不存在的计时器，它应该在此时启动一个不存在的服务。这应该通过systemd瞬态单元（如systemd run）完成

当我执行以下代码时，我收到一个异常（见下文）。有人能告诉我，例外情况想告诉我什么吗

import dbus
import time

proxy = dbus.SystemBus().get_object("org.freedesktop.systemd1", "/org/freedesktop/systemd1")
systemd = dbus.Interface(proxy, dbus_interface="org.freedesktop.systemd1.Manager")
future = time.time() + 15
job = systemd.StartTransientUnit( \
    "bla-foo.timer", "replace", \
        [ \
            ("Description", "Bla Foo Timer"), \
            ("RemainAfterElapse", False), \
            ("OnCalendar", time.strftime("%Y-%m-%d %H:%M:%S", time.localtime(future))) \
        ], \
        [("bla-foo.service", \
            [ \
                ("Description", "Bla Foo Service"), \
                ("ExecStart", ("/usr/bin/python3", ["-c", "import os; print(os.getcwd())"], False)), \
                ("Type", "oneshot"), \
                ("WorkingDirectory", "/usr/lib") \
            ] \
        )] \
    )
print(job)

回溯（最近一次呼叫最后一次）：
文件“/usr/lib/swmanager/preinstaller/test.py”，第19行，在
（“工作目录”，“/usr/lib”）\
文件“/usr/lib/python3.7/site packages/dbus/proxies.py”，第72行，在调用中__
返回self.\u proxy\u方法（*参数，**关键字）
文件“/usr/lib/python3.7/site packages/dbus/proxies.py”，第147行，在调用中__
**关键词）
文件“/usr/lib/python3.7/site packages/dbus/connection.py”，第653行，在call_blocking中
消息（超时）
dbus.exceptions.DBusException:System.Error.ENXIO:没有这样的设备或地址

问题是ExecStart参数的格式不正确

正确答案是：

（“ExecStart”、[（“/usr/bin/python3”、[“/usr/bin/python3”、“-c”、“导入操作系统；打印（os.getcwd（））”]、True）]，

完整的工作代码：

import dbus
import time

proxy = dbus.SystemBus().get_object("org.freedesktop.systemd1", "/org/freedesktop/systemd1")
systemd = dbus.Interface(proxy, dbus_interface="org.freedesktop.systemd1.Manager")
future = time.time() + 15
job = systemd.StartTransientUnit( \
    "bla-foo.timer", "replace", \
        [ \
            ("Description", "Bla Foo Timer"), \
            ("RemainAfterElapse", False), \
            ("OnCalendar", time.strftime("%Y-%m-%d %H:%M:%S", time.localtime(future))) \
        ], \
        [("bla-foo.service", \
            [ \
                ("Description", "Bla Foo Service"), \
                ("ExecStart", [("/usr/bin/python3", ["/usr/bin/python3", "-c", "import os; print(os.getcwd())"], True)]), \
                ("Type", "oneshot"), \
                ("WorkingDirectory", "/usr/lib") \
            ] \
        )] \
    )
print(job)

import dbus
import time

proxy = dbus.SystemBus().get_object("org.freedesktop.systemd1", "/org/freedesktop/systemd1")
systemd = dbus.Interface(proxy, dbus_interface="org.freedesktop.systemd1.Manager")
future = time.time() + 15
job = systemd.StartTransientUnit( \
    "bla-foo.timer", "replace", \
        [ \
            ("Description", "Bla Foo Timer"), \
            ("RemainAfterElapse", False), \
            ("OnCalendar", time.strftime("%Y-%m-%d %H:%M:%S", time.localtime(future))) \
        ], \
        [("bla-foo.service", \
            [ \
                ("Description", "Bla Foo Service"), \
                ("ExecStart", [("/usr/bin/python3", ["/usr/bin/python3", "-c", "import os; print(os.getcwd())"], True)]), \
                ("Type", "oneshot"), \
                ("WorkingDirectory", "/usr/lib") \
            ] \
        )] \
    )
print(job)