无法在 Python 中安装 Kivy

Question

I installed kivy with python -m pip install kivy and python -m pip install kivy[full] kivy-examples , I tried hundreds of different installing methods, I tried to execute as an administrator with --force-reinstall but if I write import kivy.app , this is the output:

[INFO   ] [Logger      ] Record log in C:\Users\simon\.kivy\logs\kivy_22-01-23_3.txt
[INFO   ] [deps        ] Successfully imported "kivy_deps.gstreamer" 0.3.3
[INFO   ] [deps        ] Successfully imported "kivy_deps.angle" 0.3.0
[INFO   ] [deps        ] Successfully imported "kivy_deps.glew" 0.3.0
[INFO   ] [deps        ] Successfully imported "kivy_deps.sdl2" 0.3.1
[INFO   ] [Kivy        ] v2.0.0
[INFO   ] [Kivy        ] Installed at "C:\Python310\lib\kivy\__init__.py"
[INFO   ] [Python      ] v3.10.0 (tags/v3.10.0:b494f59, Oct  4 2021, 19:00:18) [MSC v.1929 64 bit (AMD64)]
[INFO   ] [Python      ] Interpreter at "C:\Python310\pythonw.exe"
[ERROR  ] [Clock       ] Unable to import kivy._clock. Have you perhaps forgotten to compile kivy? Kivy contains Cython code which needs to be compiled. A missing kivy._clock often indicates the Cython code has not been compiled. Please follow the installation instructions and make sure to compile Kivy
 Traceback (most recent call last):
   File "<pyshell#0>", line 1, in <module>
     import kivy.app
   File "C:\Python310\lib\kivy\app.py", line 411, in <module>
     from kivy.base import runTouchApp, async_runTouchApp, stopTouchApp
   File "C:\Python310\lib\kivy\base.py", line 28, in <module>
     from kivy.clock import Clock
   File "C:\Python310\lib\kivy\clock.py", line 466, in <module>
     from kivy._clock import CyClockBase, ClockEvent, FreeClockEvent, \
 ModuleNotFoundError: No module named 'kivy._clock'

But if I just execute import kivy it works. What should I do? In Python 3.9 it works.

Answer 1

The output shows that kivy uses python version 3.10 and for that version, kivy is still in development status.

So if you have no problem changing your python version you can use version 3.8.10 that's what I am currently using with kivy.

Then just simply pip install kivy and the import import kivy.app works just as intedend

Answer 2

I had a similar problem, it turns out that kivy wasn't installed properly, I had to install the latest cutting-edge Kivy from master. Follow the steps below. Here are the full download instructions for Windows:

NOTE: Kivy does not yet support Python 3.10 but you can get through fine with Python 3.9

Setup terminal and pip

Before Kivy can be installed, Python and pip need to be pre-installed . Then, start a new terminal that has Python available. In the terminal, update pip and other installation dependencies so you have the latest version as follows, (for linux users you may have to substitute python3 instead of python and also add a --user flag in the subsequent commands outside the virtual environment):

python -m pip install --upgrade pip setuptools virtualenv

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Create virtual environment

1. Create a new virtual environment for your Kivy project. A virtual environment will prevent possible installation conflicts with other Python versions and packages. It's optional but strongly recommended:

Create the virtual environment named kivy_venv in your current directory:

python -m virtualenv kivy_venv

2. Activate the virtual environment. You will have to do this step from the current directory every time you start a new terminal. This sets up the environment so the new kivy_venv Python is used.

For Windows default CMD, in the command line do:

kivy_venv\Scripts\activate

If you are in a bash terminal on Windows, instead do:

source kivy_venv/Scripts/activate

If you are in Linux, instead do:

source kivy_venv/bin/activate

Your terminal should now preface the path with something like (kivy_venv), indicating that the kivy_venv environment is active. If it doesn't say that, the virtual environment is not active and the following won't work.

---

Install Kivy

Finally, install Kivy using the latest cutting-edge Kivy from master:

python -m pip install "kivy[base] @ https://github.com/kivy/kivy/archive/master.zip"

More info on the Kivy installation page. If you need any help, or this did not work for you, please feel free to ask me in the comments.