Question

我使用python打开现有的excel文件并进行一些格式化并保存并关闭文件。当文件大小很小但是excel大小很大时（apprx.40MB），我的代码工作正常。我收到序列化I / O错误，我确定它是由于内存问题或由于我的代码。请帮助。

系统配置：

RAM - 8 GB 32位操作 Windows 7

代码：

import numpy as np
from openpyxl import load_workbook
from openpyxl.styles import colors, Font


dest_loc='/Users/abdulr06/Documents/Python Scripts/'

np.seterr(divide='ignore', invalid='ignore')

SRC='TSYS'
YM1='201707'

dest_file=dest_loc+SRC+'_'+''+YM1+'.xlsx'  

sheetname = [SRC+''+' GL-Recon']   


#Following code is common for rest of the sourc systems 
wb=load_workbook(dest_file)

fmtB=Font(color=colors.BLUE) 
fmtR=Font(color=colors.RED)

for i in range(len(sheetname)):             

  sheet1=wb.get_sheet_by_name(sheetname[i])             
  print(sheetname[i])  

  last_record=sheet1.max_row+1 

  for m in range(2,last_record):
      if -30 <= sheet1.cell(row=m,column=5).value <=30:          
          ft=sheet1.cell(row=m,column=5)
          ft.font=fmtB
          ft.number_format = '_(* #,##0.00_);_(* (#,##0.00);_(* "-"??_);_(@_)'
          ft1=sheet1.cell(row=m,column=6)
          ft1.number_format = '0.00%'
      else:          
          ft=sheet1.cell(row=m,column=5)  
          ft.font=fmtR  
          ft.number_format = '_(* #,##0.00_);_(* (#,##0.00);_(* "-"??_);_(@_)'
          ft1=sheet1.cell(row=m,column=6)
          ft1.number_format = '0.00%' 
wb.save(filename=dest_file)

例外：

Traceback (most recent call last):

  File "<ipython-input-17-fc16d9a46046>", line 6, in <module>
    wb.save(filename=dest_file)

  File "C:\Users\abdulr06\AppData\Local\Continuum\Anaconda3\lib\site-packages\openpyxl\workbook\workbook.py", line 263, in save
    save_workbook(self, filename)

  File "C:\Users\abdulr06\AppData\Local\Continuum\Anaconda3\lib\site-packages\openpyxl\writer\excel.py", line 239, in save_workbook
    writer.save(filename, as_template=as_template)

  File "C:\Users\abdulr06\AppData\Local\Continuum\Anaconda3\lib\site-packages\openpyxl\writer\excel.py", line 222, in save
    self.write_data(archive, as_template=as_template)

  File "C:\Users\abdulr06\AppData\Local\Continuum\Anaconda3\lib\site-packages\openpyxl\writer\excel.py", line 80, in write_data
    self._write_worksheets(archive)

  File "C:\Users\abdulr06\AppData\Local\Continuum\Anaconda3\lib\site-packages\openpyxl\writer\excel.py", line 163, in _write_worksheets
    xml = sheet._write(self.workbook.shared_strings)

  File "C:\Users\abdulr06\AppData\Local\Continuum\Anaconda3\lib\site-packages\openpyxl\worksheet\worksheet.py", line 776, in _write
    return write_worksheet(self, shared_strings)

  File "C:\Users\abdulr06\AppData\Local\Continuum\Anaconda3\lib\site-packages\openpyxl\writer\worksheet.py", line 263, in write_worksheet
    xf.write(worksheet.page_breaks.to_tree())

  File "serializer.pxi", line 1016, in lxml.etree._FileWriterElement.__exit__ (src\lxml\lxml.etree.c:141944)

  File "serializer.pxi", line 904, in lxml.etree._IncrementalFileWriter._write_end_element (src\lxml\lxml.etree.c:140137)

  File "serializer.pxi", line 999, in lxml.etree._IncrementalFileWriter._handle_error (src\lxml\lxml.etree.c:141630)

  File "serializer.pxi", line 195, in lxml.etree._raiseSerialisationError (src\lxml\lxml.etree.c:131006)

SerialisationError: IO_WRITE

Answer 1

为什么要在每个循环中分配字体？

fmt=Font(color=colors.BLUE)

或红色，创建红色和蓝色两种字体，一次然后再使用它，每次分配字体时，都会占用更多内存。

首先优化您的代码。减少代码->减少错误，例如：

mycell = sheet1.cell(row=m,column=5)       
if -30 <= mycell.value <=30: 
    mycell.font = redfont

这应该确保您不再有问题（希望如此）

保存Excel文件时的I / O错误 - Python

1 个答案: