在执行 pip install -r requirements.txt 时，在安装 matplotlib 的阶段出现以下错误:
REQUIRED DEPENDENCIES AND EXTENSIONS
numpy: yes [not found. pip may install it below.]
dateutil: yes [dateutil was not found. It is required for date
axis support. pip/easy_install may attempt to
install it after matplotlib.]
tornado: yes [tornado was not found. It is required for the
WebAgg backend. pip/easy_install may attempt to
install it after matplotlib.]
pyparsing: yes [pyparsing was not found. It is required for
mathtext support. pip/easy_install may attempt to
install it after matplotlib.]
pycxx: yes [Couldn't import. Using local copy.]
libagg: yes [pkg-config information for 'libagg' could not
be found. Using local copy.]
freetype: no [pkg-config information for 'freetype2' could
not be found.]
...
The following required packages can not be built:
* freetype
不应该 pip install -r requirements.txt 也安装 freetype 吗？应该如何在 Ubuntu 12.04 中安装 freetype 以便它可以与 matplotlib 一起使用？
最佳答案
没有。 pip 不会安装系统级依赖项。这意味着 pip 不会安装 RPM(Redhat 系统)或 DEB(Debian 系统)。
要安装系统依赖项，您需要根据您的系统使用以下方法之一。
Ubuntu/Debian:
apt-get install libfreetype6-dev
在基于 Ubuntu/Debian 的系统上搜索软件包:
apt-cache search <string>
例如:
apt-cache search freetype | grep dev
Redhat/CentOS/Fedora:
yum -y install freetype-devel
在基于 Redhat/CentOS/Fedora 的系统上搜索软件包:
yum search <string>
例如:
yum search freetype | grep devel
Mac OS X:(通过 Homebrew )
brew install freetype
在基于 Mac OS X 的系统上搜索软件包:
brew search <string>
例如:
brew search freetype
关于python - 运行 `pip install` 的 Ubuntu 给出错误 'The following required packages can not be built: * freetype'，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/20533426/