backports/lzma/_lzmamodule.c:115:10: fatal error: lzma.h" No such file or directory

这个错误通常是因为你的编译器找不到 `lzma.h` 文件。这个文件是用来支持LZMA压缩算法的。如果你使用的是Linux系统，可以尝试安装 `liblzma-dev` 包来解决此问题。如果你使用的是Windows系统，可以尝试在官方网站上下载并安装LZMA SDK。

如果你已经安装了 `liblzma-dev` 或者LZMA SDK，并且仍然遇到这个错误，可能是因为编译器没有正确配置。你可以尝试在编译命令中添加 `-I` 选项来指定头文件目录的路径。例如：

gcc -o myprogram myprogram.c -I/path/to/lzma/include -llzma

其中 `/path/to/lzma/include` 是你安装LZMA时头文件的路径。

相关问题

ImportError: cannot import name 'tarfile' from 'backports' (/home/vision/jnf/anaconda3/lib/python3.8/site-packages/backports/__init__.py)

这个ImportError表明在尝试导入Python库`tarfile`时出现了问题。从错误消息来看，它是在试图从`backports`包中导入`tarfile`，但是找不到该名称。`backports`通常是提供一些向前兼容补丁或旧版本功能的库，用于支持那些在标准库中移除或更新后的老函数。

问题可能有以下几个方面的原因：
1. `tarfile`在Python的标准库中已经不再作为backports的一部分，可能需要直接导入`tarfile`而不是`backports.tarfile`。
2. 如果您的系统使用的Python版本较新，而`tarfile`功能已经被纳入标准库，那么`backports`可能就不再必要了。
3. `backports.tarfile`可能尚未安装，尽管`backports`已经存在。可以尝试先使用pip安装`backports.tarfile`。

解决此问题的步骤：
1. 检查是否已安装`tarfile`。如果没有，可以尝试使用`pip install tarfile`。
2. 如果不需要backports提供的其他内容，可以直接删除`backports`导入并改为`import tarfile`。
3. 如果是使用虚拟环境，确保在环境中安装了正确的依赖。

W: http://archive.ubuntu.com/ubuntu/dists/jammy/InRelease: The key(s) in the keyring /etc/apt/trusted.gpg.d/ubuntu-keyring-2012-cdimage.gpg are ignored as the file is not readable by user '_apt' executing apt-key. W: http://archive.ubuntu.com/ubuntu/dists/jammy/InRelease: The key(s) in the keyring /etc/apt/trusted.gpg.d/ubuntu-keyring-2018-archive.gpg are ignored as the file is not readable by user '_apt' executing apt-key. W: GPG error: http://archive.ubuntu.com/ubuntu jammy InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 871920D1991BC93C E: The repository 'http://archive.ubuntu.com/ubuntu jammy InRelease' is not signed. W: http://security.ubuntu.com/ubuntu/dists/jammy-security/InRelease: The key(s) in the keyring /etc/apt/trusted.gpg.d/ubuntu-keyring-2012-cdimage.gpg are ignored as the file is not readable by user '_apt' executing apt-key. W: http://security.ubuntu.com/ubuntu/dists/jammy-security/InRelease: The key(s) in the keyring /etc/apt/trusted.gpg.d/ubuntu-keyring-2018-archive.gpg are ignored as the file is not readable by user '_apt' executing apt-key. W: GPG error: http://security.ubuntu.com/ubuntu jammy-security InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 871920D1991BC93C E: The repository 'http://security.ubuntu.com/ubuntu jammy-security InRelease' is not signed. W: http://archive.ubuntu.com/ubuntu/dists/jammy-updates/InRelease: The key(s) in the keyring /etc/apt/trusted.gpg.d/ubuntu-keyring-2012-cdimage.gpg are ignored as the file is not readable by user '_apt' executing apt-key. W: http://archive.ubuntu.com/ubuntu/dists/jammy-updates/InRelease: The key(s) in the keyring /etc/apt/trusted.gpg.d/ubuntu-keyring-2018-archive.gpg are ignored as the file is not readable by user '_apt' executing apt-key. W: GPG error: http://archive.ubuntu.com/ubuntu jammy-updates InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 871920D1991BC93C E: The repository 'http://archive.ubuntu.com/ubuntu jammy-updates InRelease' is not signed. W: http://archive.ubuntu.com/ubuntu/dists/jammy-backports/InRelease: The key(s) in the keyring /etc/apt/trusted.gpg.d/ubuntu-keyring-2012-cdimage.gpg are ignored as the file is not readable by user '_apt' executing apt-key. W: http://archive.ubuntu.com/ubuntu/dists/jammy-backports/InRelease: The key(s) in the keyring /etc/apt/trusted.gpg.d/ubuntu-keyring-2018-archive.gpg are ignored as the file is not readable by user '_apt' executing apt-key. W: GPG error: http://archive.ubuntu.com/ubuntu jammy-backports InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 871920D1991BC93C E: The repository 'http://archive.ubuntu.com/ubuntu jammy-backports InRelease' is not signed. E: Problem executing scripts APT::Update::Post-Invoke 'rm -f /var/cache/apt/archives/*.deb /var/cache/apt/archives/partial/*.deb /var/cache/apt/*.bin || true' E: Sub-process returned an error code

这个错误是由于apt-key无法读取/etc/apt/trusted.gpg.d/目录下的文件，导致无法验证Ubuntu软件源的签名。解决这个问题的方法是：

1. 使用以下命令导入缺失的公钥：

   sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 871920D1991BC93C

注意替换上述命令中的871920D1991BC93C为您的错误中所提到的缺失的公钥。

2. 如果上述命令无效，可以尝试使用以下命令：

   sudo apt-key adv --refresh-keys --keyserver keyserver.ubuntu.com

3. 如果上述命令仍然无效，可以尝试手动下载公钥并导入。首先，找到缺失的公钥的ID，例如871920D1991BC93C。然后，使用以下命令下载公钥：

   sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 871920D1991BC93C

最后，使用以下命令将公钥导入系统：

   sudo apt-key add /path/to/downloaded/key

注意替换上述命令中的/path/to/downloaded/key为您下载的公钥文件的路径。

完成上述步骤后，再次运行apt-get update应该就不会出现上述错误了。