如何在python-pptx中更改/添加图表数据系列？ [英] How to change/add chart data series in python-pptx?

问题描述

我正在尝试使用python-pptx在现有图表中设置数据。

I'm trying to set data in an existing chart using python-pptx.

from pptx import Presentation
pres_path = "C:\\pres.pptx"
pres = Presentation(pres_path)

pres.slides[3].shapes[4].chart.series[0].values

（92.0，330.0，309.0，313.0，356.0，421.0，457.0）

(92.0, 330.0, 309.0, 313.0, 356.0, 421.0, 457.0)

pres.slides[3].shapes[4].chart.series[0].values = (1,2,3)

Traceback (most recent call last):
  File "<input>", line 1, in <module>
  AttributeError: can't set attribute

文档中提到的一种方法似乎很相关，但我不明白如何使用它：
http://python-pptx.readthedocs.org/en/latest/_modules/pptx/chart/data.html

There's a method mentioned in the documentation which seems relevant, but I can't understand how to use it: http://python-pptx.readthedocs.org/en/latest/_modules/pptx/chart/data.html

pres.slides[3].shapes[4].chart.replace_data((1,2,3))


Traceback (most recent call last):
  File "<input>", line 1, in <module>
  File "C:\Python27\lib\site-packages\pptx\chart\chart.py", line 119, in     replace_data
    _SeriesRewriter.replace_series_data(self._chartSpace, chart_data)
  File "C:\Python27\lib\site-packages\pptx\chart\chart.py", line 197, in replace_series_data
sers = cls._adjust_ser_count(chartSpace, len(chart_data.series))
AttributeError: 'tuple' object has no attribute 'series'

非常感谢您能提供的任何帮助。
谢谢！

I'd appreciate any help you can provide. Thanks!

推荐答案

要将新系列添加到图表后面的现有表中，您需要做3件事：

To add a new series to an existing table behind a chart you need to do 3 things:

1. 创建ChartData（）的实例


2. 提供类别名称



3. 使用 add_series（）函数将新系列添加到ChartData（）对象。

1. create an instance of ChartData()
2. provide category name

3. add the new series to the ChartData() object, using the "add_series()" func.

chart_data = ChartData()
chart_data.categories = 'category_name'

for col_idx, col in enumerate(single_df.columns):
    chart_data.add_series(col, (single_df.ix[:, col_idx].values))            

shp.chart.replace_data(chart_data)

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