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Python中的一个绘制图表的模块：pycha

背景

看到有人提到pycha，说是关于用python画图表的。

之前也已经折腾过一个类似的，操作Excel中去画图表的：

【已解决】Python中处理操作Excel中的图表（Chart，Graph）

现在这个，貌似是独立的，画图表的。

pycha简介

根据Python官网

http://pypi.python.org/pypi/pycha/

和其主页

https://bitbucket.org/lgs/pycha/wiki/Home

的介绍:

pycha是啥

pycha是个Python模块，用来画图表的的模块。

pycha是PYthon CHArts的缩写；

一些例子：

Python中的一个绘制图表的模块：pycha

pycha的优点/特点

轻量级
用起来简单
使用默认值，画出来的效果就已经很好看了
可以自定义，定制化
没打算支持所有类型的图表，但是尽量支持最常见的，最通用的图表

pycha的相关介绍

1.其用到了 Cairo 库。

2. 与此类似的模块，还有： pyCairoChart

3. Pycha基于 Plotr ，而 Plotr 又基于 PlotKit

之前其是用javascript实现的（运行在客户端），作者希望其可以在服务端运行，所以将 Plotr 移植成用Python实现。

4. 官网文档： http://packages.python.org/pycha

下载pycha

在

http://pypi.python.org/pypi/pycha/

中就可以找到下载地址：

pycha-0.6.0.tar.gz

下载得到pycha-0.6.0.tar.gz，解压，得到文件夹pycha-0.6.0。

安装pycha

安装之前，发现此处依赖的cairo，还没安装，肯定待会使用也是不行的。

所以先去折腾安装cairo，详见：

【记录】安装Python版本的cairo模块：Pycairo

安装完毕了python版本的cairo，Pycairo后，再去继续安装pycha。

打开cmd，切换到对应目录pycha-0.6.0，去执行setup.py install，此处竟然出现没有setuptools的错误。

详细折腾过程参见：

【已解决】Python中使用setup.py install去安装别的模块结果出错：ImportError: No module named setuptools

然后再去安装，就正常了：

D:/tmp/dev_tools/python/pycha/dist/pycha-0.6.0>setup.py install running install running bdist_egg running egg_info writing pycha.egg-info/PKG-INFO writing top-level names to pycha.egg-info/top_level.txt writing dependency_links to pycha.egg-info/dependency_links.txt writing entry points to pycha.egg-info/entry_points.txt reading manifest file 'pycha.egg-info/SOURCES.txt' reading manifest template 'MANIFEST.in' writing manifest file 'pycha.egg-info/SOURCES.txt' installing library code to build/bdist.win-amd64/egg running install_lib running build_py creating build creating build/lib creating build/lib/pycha copying pycha/bar.py -> build/lib/pycha copying pycha/chart.py -> build/lib/pycha copying pycha/color.py -> build/lib/pycha copying pycha/line.py -> build/lib/pycha copying pycha/pie.py -> build/lib/pycha copying pycha/scatter.py -> build/lib/pycha copying pycha/stackedbar.py -> build/lib/pycha copying pycha/utils.py -> build/lib/pycha copying pycha/__init__.py -> build/lib/pycha creating build/lib/chavier copying chavier/app.py -> build/lib/chavier copying chavier/dialogs.py -> build/lib/chavier copying chavier/gui.py -> build/lib/chavier copying chavier/__init__.py -> build/lib/chavier creating build/bdist.win-amd64 creating build/bdist.win-amd64/egg creating build/bdist.win-amd64/egg/chavier copying build/lib/chavier/app.py -> build/bdist.win-amd64/egg/chavier copying build/lib/chavier/dialogs.py -> build/bdist.win-amd64/egg/chavier copying build/lib/chavier/gui.py -> build/bdist.win-amd64/egg/chavier copying build/lib/chavier/__init__.py -> build/bdist.win-amd64/egg/chavier creating build/bdist.win-amd64/egg/pycha copying build/lib/pycha/bar.py -> build/bdist.win-amd64/egg/pycha copying build/lib/pycha/chart.py -> build/bdist.win-amd64/egg/pycha copying build/lib/pycha/color.py -> build/bdist.win-amd64/egg/pycha copying build/lib/pycha/line.py -> build/bdist.win-amd64/egg/pycha copying build/lib/pycha/pie.py -> build/bdist.win-amd64/egg/pycha copying build/lib/pycha/scatter.py -> build/bdist.win-amd64/egg/pycha copying build/lib/pycha/stackedbar.py -> build/bdist.win-amd64/egg/pycha copying build/lib/pycha/utils.py -> build/bdist.win-amd64/egg/pycha copying build/lib/pycha/__init__.py -> build/bdist.win-amd64/egg/pycha byte-compiling build/bdist.win-amd64/egg/chavier/app.py to app.pyc byte-compiling build/bdist.win-amd64/egg/chavier/dialogs.py to dialogs.pyc byte-compiling build/bdist.win-amd64/egg/chavier/gui.py to gui.pyc byte-compiling build/bdist.win-amd64/egg/chavier/__init__.py to __init__.pyc byte-compiling build/bdist.win-amd64/egg/pycha/bar.py to bar.pyc byte-compiling build/bdist.win-amd64/egg/pycha/chart.py to chart.pyc byte-compiling build/bdist.win-amd64/egg/pycha/color.py to color.pyc byte-compiling build/bdist.win-amd64/egg/pycha/line.py to line.pyc byte-compiling build/bdist.win-amd64/egg/pycha/pie.py to pie.pyc byte-compiling build/bdist.win-amd64/egg/pycha/scatter.py to scatter.pyc byte-compiling build/bdist.win-amd64/egg/pycha/stackedbar.py to stackedbar.pyc byte-compiling build/bdist.win-amd64/egg/pycha/utils.py to utils.pyc byte-compiling build/bdist.win-amd64/egg/pycha/__init__.py to __init__.pyc creating build/bdist.win-amd64/egg/EGG-INFO copying pycha.egg-info/PKG-INFO -> build/bdist.win-amd64/egg/EGG-INFO copying pycha.egg-info/SOURCES.txt -> build/bdist.win-amd64/egg/EGG-INFO copying pycha.egg-info/dependency_links.txt -> build/bdist.win-amd64/egg/EGG-INFO copying pycha.egg-info/entry_points.txt -> build/bdist.win-amd64/egg/EGG-INFO copying pycha.egg-info/top_level.txt -> build/bdist.win-amd64/egg/EGG-INFO copying pycha.egg-info/zip-safe -> build/bdist.win-amd64/egg/EGG-INFO creating dist creating 'dist/pycha-0.6.0-py2.7.egg' and adding 'build/bdist.win-amd64/egg' to it removing 'build/bdist.win-amd64/egg' (and everything under it) Processing pycha-0.6.0-py2.7.egg Copying pycha-0.6.0-py2.7.egg to d:/tmp/dev_install_root/python27_x64/lib/site-packages Adding pycha 0.6.0 to easy-install.pth file Installing chavier-script.pyw script to D:/tmp/dev_install_root/Python27_x64/Scripts Installing chavier.exe script to D:/tmp/dev_install_root/Python27_x64/Scripts Installing chavier.exe.manifest script to D:/tmp/dev_install_root/Python27_x64/Scripts  Installed d:/tmp/dev_install_root/python27_x64/lib/site-packages/pycha-0.6.0-py2.7.egg Processing dependencies for pycha==0.6.0 Finished processing dependencies for pycha==0.6.0

使用pycha

都安装好了，就可以去试试效果了。

参考：

http://packages.python.org/pycha/tutorial.html

去写代码。

后来还是从：

https://bitbucket.org/lgs/pycha/src/fa89153081d0/examples?at=default

找到：

https://bitbucket.org/lgs/pycha/src/fa89153081d0/examples/piechart.py?at=default

试了试代码：

#!/usr/bin/python # -*- coding: utf-8 -*- """ Function: 【记录】折腾Python中的一个绘制图表的模块：pycha http://www.crifan.com/python_making_charts_module_pycha  Author:     Crifan Li Version:    2013-01-04 Contact:    admin at crifan dot com """  import cairo; import sys; import cairo; import pycha.pie; from lines import lines;  def pycharDemo(output):     surface = cairo.ImageSurface(cairo.FORMAT_ARGB32, 800, 800)      dataSet = [(line[0], [[0, line[1]]]) for line in lines]      options = {         'axis': {             'x': {                 'ticks': [dict(v=i, label=d[0]) for i, d in enumerate(lines)],             }         },         'legend': {             'hide': True,         },         'title': 'Pie Chart',     }     chart = pycha.pie.PieChart(surface, options)      chart.addDataset(dataSet)     chart.render()      surface.write_to_png(output)  if __name__ == '__main__':     if len(sys.argv) > 1:         output = sys.argv[1]     else:         output = 'piechart.png'     pycharDemo(output);

运行结果竟然又是缺少一个lines：

D:/tmp/tmp_dev_root/python/tutorial_summary/pycha_demo>pycha_demo.py Traceback (most recent call last):   File "D:/tmp/tmp_dev_root/python/tutorial_summary/pycha_demo/pycha_demo.py", line 17, in <module>     from lines import lines; ImportError: No module named lines

所以，还得再去安装lines：

【已解决】Python代码运行出错：ImportError: No module named lines

然后后来就是去把相关示例代码都下载下来了：

Python中的一个绘制图表的模块：pycha