Python 3 ModuleNotFoundError：没有名为'；标段'；

我试图运行一个python3单元测试脚本，但是当它使用来自主scit的对象并遇到import语句时，它给了我一个modulenotfound错误。当我运行主脚本本身并且代码按预期运行时，我不会遇到这个错误。我得到的错误回溯是：

Traceback (most recent call last):
  File "parkingLot_test.py", line 3, in <module>
    from source import parking  
  File "/home/stash/Desktop/parking-lot/parking-lot-1.4.2/parking_lot/parking_lot/bin/source/parking.py", line 1, in <module>
    import lot

ModuleNotFoundError: No module named 'lot'

单元测试文件的代码parkingLot\u test.py：

import unittest
from source import parking  

class ParkingTest(unittest.TestCase):

    @classmethod
    def MakeClass(cls):
        cls.parking = parking.Parking()
        cls.allocated_slot = 1

    def test_a_create_parking_lot(self):
        parking_slots = 6
        self.parking.create_parking_lot(parking_slots)
        self.assertEqual(len(self.parking.slots), parking_slots,
                         msg="Wrong parking lot created")

    def test_b_park(self):
        registration_no = "MH-12-FF-2017"
        colour = "Black"
        self.parking.park(registration_no, colour)
        self.assertFalse(
            self.parking.slots[self.allocated_slot].available, "Park failed.")
        for i in self.parking.slots.values():
            if not i.available and i.car:
                self.assertEqual(i.car.registration_no,
                                 registration_no, "Park failed")
                self.assertEqual(i.car.colour, colour, "Park failed")

    def test_c_leave(self):
        self.parking.leave(self.allocated_slot)
        self.assertTrue(
            self.parking.slots[self.allocated_slot].available, "Leave failed.")

    @classmethod
    def RemoveClass(cls):
        del cls.parking


if __name__ == '__main__':
    unittest.main()

import lot
import car


class Parking:
    """
    Parking class which has details about parking slots
    as well as operation performed on parking are present here
    """

    def __init__(self):
        self.slots = {}

    def create_parking_lot(self, no_of_slots):
        """This method will create parking lot if not present already with given
        number of slots.
        Input: no_of_slots - Integer Type
        """
        no_of_slots = int(no_of_slots)

        if len(self.slots) > 0:
            print("Parking Lot already created")
            return

        if no_of_slots > 0:
            for i in range(1, no_of_slots+1):
                temp_slot = lot.ParkingSlot(slotNum=i,
                                            availability=True)

                self.slots[i] = temp_slot
            print("Created a parking lot with %s slots" % no_of_slots)
        else:
            print("Number of slots provided is incorrect.")
        return

    def get_nearest_available_slot(self):
  ...................

导入文件parking.py的代码如下：

import unittest
from source import parking  

class ParkingTest(unittest.TestCase):

    @classmethod
    def MakeClass(cls):
        cls.parking = parking.Parking()
        cls.allocated_slot = 1

    def test_a_create_parking_lot(self):
        parking_slots = 6
        self.parking.create_parking_lot(parking_slots)
        self.assertEqual(len(self.parking.slots), parking_slots,
                         msg="Wrong parking lot created")

    def test_b_park(self):
        registration_no = "MH-12-FF-2017"
        colour = "Black"
        self.parking.park(registration_no, colour)
        self.assertFalse(
            self.parking.slots[self.allocated_slot].available, "Park failed.")
        for i in self.parking.slots.values():
            if not i.available and i.car:
                self.assertEqual(i.car.registration_no,
                                 registration_no, "Park failed")
                self.assertEqual(i.car.colour, colour, "Park failed")

    def test_c_leave(self):
        self.parking.leave(self.allocated_slot)
        self.assertTrue(
            self.parking.slots[self.allocated_slot].available, "Leave failed.")

    @classmethod
    def RemoveClass(cls):
        del cls.parking


if __name__ == '__main__':
    unittest.main()

import lot
import car


class Parking:
    """
    Parking class which has details about parking slots
    as well as operation performed on parking are present here
    """

    def __init__(self):
        self.slots = {}

    def create_parking_lot(self, no_of_slots):
        """This method will create parking lot if not present already with given
        number of slots.
        Input: no_of_slots - Integer Type
        """
        no_of_slots = int(no_of_slots)

        if len(self.slots) > 0:
            print("Parking Lot already created")
            return

        if no_of_slots > 0:
            for i in range(1, no_of_slots+1):
                temp_slot = lot.ParkingSlot(slotNum=i,
                                            availability=True)

                self.slots[i] = temp_slot
            print("Created a parking lot with %s slots" % no_of_slots)
        else:
            print("Number of slots provided is incorrect.")
        return

    def get_nearest_available_slot(self):
  ...................

---

如何解决此问题？

因为python 3不支持隐式相对导入。可以使用显式相对导入

尝试使用以下行，而不是parking.py中的import lot

---

来自。在同一目录级文件中导入批次

当您在另一个目录级文件中导入一个文件时，请使用相对导入，如

在

parking.py

文件中导入

lot.py

文件为

import .log

当从一个目录导入到下一个目录时，即在

parkingLot\u test.py

，使用源导入批次的

并在

\uuuu init\uuuuuupy

文件写入的源文件夹中

import .lot
import .parking

---

像这样

文件夹

source

需要添加到导入路径，方法是将其路径附加到

sys.path

或将其放入

PYTHONPATH

@rdas，因为我仍然得到

ModuleNotFoundError:No module name'lot'

我使用的

sys.path.append（./”）

在import-lot语句之前，尝试直接运行parking.py@rdas。尝试使用此命令运行脚本

python-m parkingLot\u test

我收到一个错误

ImportError:尝试在没有已知父包的情况下进行相对导入

在主脚本和使用

python-m parkingLot\u test

除了一些python3语法差异错误外，测试脚本似乎运行良好。因此，它似乎按照Python2.7的预期运行，当直接运行脚本时，它没有设置

\uuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuu。如果您使用-m标志运行脚本，它会告诉解释器将文件视为一个模块。如果您没有在lot.py中提到
\uu all\uuuu
，我会得到这个错误
AttributeError:module'source.lot'没有属性'\uu all\uuuuuu'
，只需从
\uu init\uuuuuuuuuuuy.py
文件中删除
\uu all\uuuuuuuu
，是的，您可以在
\uuuu init\uuuuuuuuuuuuuuuuuuupy
文件中写入并进行更改，我在解决方案中进行了更改，就像这样写入
\uuuuuuuuuuuuuuuuuuuuupy
文件我尝试了方法，但我得到错误
AttributeError:“ParkingTest”对象没有属性“parking”
来自源代码导入parking