相关疑难解决方法(0)

我正在尝试将matplotlib字体更改为helvetica,我想在PDF图中使用它.我尝试以下方法:

import matplotlib
matplotlib.use('PDF')
import matplotlib.pylab as plt
from matplotlib import rc
plt.rcParams['ps.useafm'] = True
rc('font',**{'family':'sans-serif','sans-serif':['Helvetica']})
plt.rcParams['pdf.fonttype'] = 42

这不起作用 - 当我用--verbose-debug运行我的代码时,我收到错误:

backend WXAgg version 2.8.10.1
/Library/Frameworks/Python.framework/Versions/6.2/lib/python2.6/site-packages/matplotlib/__init__.py:833: UserWarning:  This call to matplotlib.use() has no effect
because the the backend has already been chosen;
matplotlib.use() must be called *before* pylab, matplotlib.pyplot,
or matplotlib.backends is imported for the first time.
findfont: Could not match :family=sans-serif:style=normal:variant=normal:weight=normal:stretch=normal:size=medium. Returning /Library/Frameworks/Python.framework/Versions/6.2/lib/python2.6/site-packages/matplotlib/mpl-data/fonts/ttf/Vera.ttf
Assigning font /F1 = /Library/Frameworks/Python.framework/Versions/6.2/lib/python2.6/site-packages/matplotlib/mpl-data/fonts/ttf/Vera.ttf
Embedding font /Library/Frameworks/Python.framework/Versions/6.2/lib/python2.6/site-packages/matplotlib/mpl-data/fonts/ttf/Vera.ttf
Writing TrueType font

显然它找不到Helvetica.我不知道为什么.我在mpl-data的afm目录中有Helvetica,当matplotlib启动时,它会读取它并输出:

createFontDict: /Library/Frameworks/Python.framework/Versions/6.2/lib/python2.6/site-packages/matplotlib/mpl-data/fonts/afm/Helvetica.afm

另外我还需要一个特殊的.ttf …

我有一个matplotlib脚本启动...

import matplotlib as mpl
import matplotlib.pyplot as plt
import matplotlib.font_manager as fm

mpl.rcParams['xtick.labelsize']=16 
...

我用过这个命令

fm.findSystemFonts()

获取我系统上的字体列表.我发现了我想要使用的.ttf文件的完整路径,

'/usr/share/fonts/truetype/anonymous-pro/Anonymous Pro BI.ttf'

我尝试使用以下命令成功使用此字体

mpl.rcParams['font.family'] = 'anonymous-pro'  

和

mpl.rcParams['font.family'] = 'Anonymous Pro BI'

这两者都回归了

/usr/lib/pymodules/python2.7/matplotlib/font_manager.py:1218: UserWarning: findfont: Font family ['anonymous-pro'] not found. Falling back to Bitstream Vera Sans

我可以使用mpl.rcParams字典在我的图中设置这个字体吗？

编辑

在阅读了一下之后,似乎这是从.ttf文件中确定字体系列名称的一般问题.在linux或python中这很容易吗？

另外,我试过添加

mpl.use['agg']
mpl.rcParams['text.usetex'] = False

没有任何成功