找不到kivy.uix.listview模块

Question

我在Kivy刚起步，当我导入kivy.uix.listview模块以创建ListItemButton时，出现一个错误，提示找不到该模块。

上周我对这一行代码没有任何问题，因此我尝试使用以下方法卸载并重新安装Kivy，但是没有运气：

python -m pip install-升级pip wheel setuptools

python -m pip install docutils pygments pypiwin32 kivy.deps.sdl2 kivy.deps.glew --extra-index-url https://kivy.org/downloads/packages/simple/

python -m pip install kivy

我一直在关注对我有帮助的教程，但是他似乎没有这个问题。 来源：http://www.newthinktank.com/2016/10/kivy-tutorial-4/

studentdb.py

# ------ studentdb.py ------
from kivy.app import App
from kivy.uix.boxlayout import BoxLayout
from kivy.properties import ObjectProperty
from kivy.uix.listview import ListItemButton


class StudentListButton(ListItemButton):
    pass


class StudentDB(BoxLayout):

    # Connects the value in the TextInput widget to these
    # fields
    first_name_text_input = ObjectProperty()
    last_name_text_input = ObjectProperty()
    student_list = ObjectProperty()

    def submit_student(self):

        # Get the student name from the TextInputs
        student_name = self.first_name_text_input.text + " " + self.last_name_text_input.text

        # Add the student to the ListView
        self.student_list.adapter.data.extend([student_name])

        # Reset the ListView
        self.student_list._trigger_reset_populate()

    def delete_student(self, *args):

        # If a list item is selected
        if self.student_list.adapter.selection:

            # Get the text from the item selected
            selection = self.student_list.adapter.selection[0].text

            # Remove the matching item
            self.student_list.adapter.data.remove(selection)

            # Reset the ListView
            self.student_list._trigger_reset_populate()

    def replace_student(self, *args):

        # If a list item is selected
        if self.student_list.adapter.selection:

            # Get the text from the item selected
            selection = self.student_list.adapter.selection[0].text

            # Remove the matching item
            self.student_list.adapter.data.remove(selection)

            # Get the student name from the TextInputs
            student_name = self.first_name_text_input.text + " " + self.last_name_text_input.text

            # Add the updated data to the list
            self.student_list.adapter.data.extend([student_name])

            # Reset the ListView
            self.student_list._trigger_reset_populate()


class StudentDBApp(App):
    def build(self):
        return StudentDB()


dbApp = StudentDBApp()

dbApp.run()

studentdb.kv

# ------- studentdb.kv -------
StudentDB:

<StudentDB>:
    orientation: "vertical"
    first_name_text_input: first_name
    last_name_text_input: last_name
    student_list: students_list_view
    padding: 10
    spacing: 10

    BoxLayout:
        size_hint_y: None
        height: "40dp"

        Label:
            text: "First Name"
        TextInput:
            id: first_name
        Label:
            text: "Last Name"
        TextInput:
            id: last_name

    BoxLayout:
        size_hint_y: None
        height: "40dp"
        Button:
            text: "Submit"
            size_hint_x: 15
            on_press: root.submit_student()
        Button:
            text: "Delete"
            size_hint_x: 15
            on_press: root.delete_student()
        Button:
            text: "Replace"
            size_hint_x: 15
            on_press: root.replace_student()

    # Define starting data and point to the ListItemButton
    # in the Python code
    ListView:
        id: students_list_view
        adapter:
            ListAdapter(data=["Doug Smith"], cls=main.StudentListButton)

错误-ModuleNotFoundError

# ------ ERROR MESSAGE -----
Traceback (most recent call last):
    File "studentdb.py", line 4, in <module>
    from kivy.uix.listview import ListItemButton
ModuleNotFoundError: No module named 'kivy.uix.listview'

Answer 1

不推荐使用listview模块。如果您仍要使用它，

步骤1： 安装cython。

pip install Cython==0.29.9

步骤2： 安装 kivy 1.10.0

pip install kivy==1.10.0