Question

执行pip install -r requirements.txt时，我在安装matplotlib的阶段遇到以下错误：

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

pip install -r requirements.txt不应该安装freetype吗？如何在Ubuntu 12.04中安装freetype，以便与matplotlib一起使用？

Answer 1

没有。 pip不会安装系统级依赖项。这意味着pip将不会安装RPM（基于Redhat的系统）或DEB（基于Debian的系统）。

要安装系统依赖项，您需要使用以下方法之一，具体取决于您的系统。

<强>的Ubuntu / Debian的：

apt-get install libfreetype6-dev

在基于Ubuntu / Debian的系统上搜索软件包：

apt-cache search <string>

e.g：

apt-cache search freetype | grep dev

<强>红帽/ CentOS的/ Fedora的：

yum -y install freetype-devel

在Redhat / CentOS / Fedora系统上搜索软件包：

yum search <string>

e.g：

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>

e.g：

brew search freetype

Answer 2

我必须安装libxft-dev才能在ubuntu服务器14.04上启用matplotlib。

sudo apt-get install libfreetype6-dev libxft-dev

然后我可以使用

sudo easy_install matplotlib

Answer 3

解决方法是执行sudo apt-get install pkg-config我找到in this github issue。

Answer 4

现有的答案都不适合我在Ubuntu上升级matplotlib。这最终对我有用：

$ sudo apt-get install build-dep python-matplotlib
$ pip install matplotlib --upgrade

Answer 5

此命令将下载所有依赖项。

对于python 2.x

sudo apt-get install python-matplotlib

对于python 3.x

sudo apt-get install python3-matplotlib

安装后，您可以尝试

(sudo) pip install matplotlib

Answer 6

在Ubuntu上，我在安装SELECT 'about' AS a.about,title,null article ,null description FROM about a WHERE ( MATCH(a.about) AGAINST ('\"$search\"' IN BOOLEAN MODE) ) UNION SELECT 'articles' AS null, b.title,b.article,b.description from articles b WHERE ( MATCH(b.title,b.article,b.description) AGAINST ('\"$search\"' IN BOOLEAN MODE) AS relevence_1, MATCH(b.title,b.article,b.description) AGAINST ('\"$search\"' IN BOOLEAN MODE) AS relevence_2 ) ORDER BY (relevance_1 * 3) + (relevance_2 * 2) DESC包之后就可以了。

blt-dev

Answer 7

我正在使用Mint，这些答案都不适合我，我需要：

sudo apt-get install build-essential g++

Answer 8

我在Windows上遇到了与Python 3.6相同的问题，但之后我切换到Python 3.5.2并且一切正常。

Answer 9

这个命令sudo apt-get install libfreetype6-dev对我来说在ubuntu 16.04上失败了，
The following packages have unmet dependencies: libfreetype6-dev : Depends: libfreetype6 (= 2.6.1-0.1ubuntu2) but 2.6.1-0.1ubuntu2.3 is to be installed

所以我从source下载了已安装的freetype，归功于此guide

$ tar -xvjf freetype-x.y.tar.bz2  # extract the downloaded version file
$ cd freetype-x.y/ 
$ ./configure
$ make
$ sudo make install

切换到virtualenv和pip install matplotlib，一切正常。

运行`pip install`的Ubuntu发出错误'无法构建以下必需的包：* freetype'

9 个答案: