python 柱状图 保存_使用Python导出Excel图表以及导出为图片的方法
本篇讲下如何使用纯python代码将excel 中的图表导出为图片。这里需要使用的模块有win32com、pythoncom模块。
网上经查询有人已经写好的模块pyxlchart，具体代码如下：
from win32com.client import Dispatch
import os
import pythoncom
class Pyxlchart(object):
"""
This class exports charts in an Excel Spreadsheet to the FileSystem
win32com libraries are required.
"""
def __init__(self):
pythoncom.CoInitialize()
self.WorkbookDirectory = ''
self.WorkbookFilename = ''
self.GetAllWorkbooks = False
self.SheetName = ''
self.ChartName = ''
self.GetAllWorkbookCharts = False
self.GetAllWorksheetCharts = False
self.ExportPath = ''
self.ImageFilename = ''
self.ReplaceWhiteSpaceChar = '_'
self.ImageType = 'jpg'
def __del__(self):
pass
def start_export(self):
if self.WorkbookDirectory == '':
return "WorkbookDirectory not set"
else:
self._export()
def _export(self):
"""
Exports Charts as determined by the settings in class variabels.
"""
excel = Dispatch("excel.application")
excel.Visible = False
wb = excel.Workbooks.Open(os.path.join(self.WorkbookDirectory ,self.WorkbookFilename))
self._get_Charts_In_Worksheet(wb,self.SheetName,self.ChartName)
wb.Close(False)
excel.Quit()
def _get_Charts_In_Worksheet(self,wb,worksheet = "", chartname = ""):
if worksheet != "" and chartname != "":
sht = self._change_sheet(wb,worksheet)
cht = sht.ChartObjects(chartname)
self._save_chart(cht)
return
if worksheet == "":
for sht in wb.Worksheets:
for cht in sht.ChartObjects():
if chartname == "":
self._save_chart(cht)
else:
if chartname == cht.Name:
self._save_chart(cht)
else:
sht = wb.Worksheets(worksheet)
for cht in sht.ChartObjects():
if chartname == "":
self._save_chart(cht)
else:
if chartname == cht.Name:
self._save_chart(cht)
def _change_sheet(self,wb,worksheet):
try:
return wb.Worksheets(worksheet)
except:
raise NameError('Unable to Select Sheet: ' + worksheet + ' in Workbook: ' + wb.Name)
def _save_chart(self,chartObject):
imagename