我正在关注Beeware教程，无法“创建公文包”。
在某个时候它显示了这一点:
Collecting pygobject>=3.14.0
Downloading PyGObject-3.38.0.tar.gz (712 kB)
|████████████████████████████████| 712 kB 6.9 MB/s
Installing build dependencies ... error
ERROR: Command errored out with exit status 1:
command: /usr/bin/python3.8 /usr/local/lib/python3.8/dist-packages/pip install --ignore-installed --no-user --prefix /tmp/pip-build-env-6esqaemw/overlay --no-warn-script-location --no-binary :none: --only-binary :none: -i https://pypi.org/simple -- setuptools wheel pycairo
cwd: None
Complete output (36 lines):
WARNING: The directory '/home/brutus/.cache/pip' or its parent directory is not owned or is not writable by the current user. The cache has been disabled. Check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag.
Collecting setuptools
Downloading setuptools-50.3.2-py3-none-any.whl (785 kB)
Collecting wheel
Downloading wheel-0.35.1-py2.py3-none-any.whl (33 kB)
Collecting pycairo
Downloading pycairo-1.20.0.tar.gz (344 kB)
Installing build dependencies: started
Installing build dependencies: finished with status 'done'
Getting requirements to build wheel: started
Getting requirements to build wheel: finished with status 'done'
Preparing wheel metadata: started
Preparing wheel metadata: finished with status 'done'
Building wheels for collected packages: pycairo
Building wheel for pycairo (PEP 517): started
Building wheel for pycairo (PEP 517): finished with status 'error'
ERROR: Command errored out with exit status 1:
command: /usr/bin/python3.8 /usr/local/lib/python3.8/dist-packages/pip/_vendor/pep517/_in_process.py build_wheel /tmp/tmp426eh9du
cwd: /tmp/pip-install-rmj9v5en/pycairo
Complete output (12 lines):
running bdist_wheel
running build
running build_py
creating build
creating build/lib.linux-x86_64-3.8
creating build/lib.linux-x86_64-3.8/cairo
copying cairo/__init__.py -> build/lib.linux-x86_64-3.8/cairo
copying cairo/__init__.pyi -> build/lib.linux-x86_64-3.8/cairo
copying cairo/py.typed -> build/lib.linux-x86_64-3.8/cairo
running build_ext
Requested 'cairo >= 1.15.10' but version of cairo is 1.14.6
Command '['pkg-config', '--print-errors', '--exists', 'cairo >= 1.15.10']' returned non-zero exit status 1.
----------------------------------------
ERROR: Failed building wheel for pycairo
Failed to build pycairo
ERROR: Could not build wheels for pycairo which use PEP 517 and cannot be installed directly
----------------------------------------
ERROR: Command errored out with exit status 1: /usr/bin/python3.8 /usr/local/lib/python3.8/dist-packages/pip install --ignore-installed --no-user --prefix /tmp/pip-build-env-6esqaemw/overlay --no-warn-script-location --no-binary :none: --only-binary :none: -i https://pypi.org/simple -- setuptools wheel pycairo Check the logs for full command output.
Unable to install dependencies. This may be because one of your dependencies is invalid, or because pip was unable to connect to the PyPI server.
Requested 'cairo >= 1.15.10' but version of cairo is 1.14.6
我尝试更新docker，重新安装cairo和pycairo，更新了python软件包，但错误仍然存在。
最佳答案
beeware构建过程正在尝试安装 pycairo 软件包。该软件包只是cairo图形库(libcairo2)的python接口(interface)。
pycairo changelog显示了 pycairo 的最新版本1.20.0，它需要 cairo(libcairo2)版本1.15.10+。
如果幸运的话，您只需将cairo软件包更新为可以满足要求的版本。信息在官方网站cairographics.org/download/上。
我和你有同样的问题。在我的情况下，再次提醒我将操作系统升级到较新的Ubuntu版本，因为cairo软件包 libcairo2 仅在Ubuntu 16.04 LTS官方PPA的14.6版本中可用。在Ubuntu 20.04 LTS中，可用的 libcairo2 是16.0。我怀疑您有一个类似的操作系统，因为您安装的cairo版本与我的相同。