浅谈Python xlwings 读取Excel文件的正确姿势

#coding=utf-8
import xlwings as xw
import pandas as pd
import time

start_row = 2 # 处理Excel文件开始行
end_row = 10002 # 处理Excel结束行

#记录打开表单开始时间
start_open_time = time.time()

#指定不显示地打开Excel，读取Excel文件
app = xw.App(visible=False, add_book=False)
wb = app.books.open('D:/PYTHON/TEST_CODE/Book300s.xlsx') # 打开Excel文件
sheet = wb.sheets[0] # 选择第0个表单

#记录打开Excel表单结束时间
end_open_time = time.time()

#记录开始循环计算时间
start_run = time.time()

row_content = []
#读取Excel表单前10000行的数据，Python的in range是左闭右开的,到10002结束,但区间只包含2到10001这一万条
for row in range(start_row, end_row):
  row_str = str(row)
  #循环中引用Excel的sheet和range的对象，读取B列和C列的每一行的值，对比计算
  start_value = sheet.range('B' + row_str).value
  end_value = sheet.range('C' + row_str).value
  if start_value <= end_value:
    values = end_value - start_value
    #同时测试List数组添加记录
    row_content.append(values)

#计算和
total_values = sum(row_content)

#记录结束循环计算时间
end_run = time.time()
sheet.range('E2').value = str(total_values)
sheet.range('E3').value = '使用Sheet计算时间(秒):' + str(end_run - start_run)

#保存并关闭Excel文件
wb.save()
wb.close()

print ('结果总和:', total_values)
print ('打开并读取<a>本文来源gao*daima.com搞@代#码&网6</a>Excel表单时间(秒):',  end_open_time - start_open_time)
print ('计算时间(秒):',  end_run - start_run)
print ('处理数据条数:' , len(row_content))

Option Explicit

Sub VBA_CAL_Click()
  Dim i_count As Long
  Dim offset_value, total_offset_value As Double
  Dim st, et As Date
  st = Time()

  i_count = Sheets("Sheet1").Cells(Rows.Count, 1).End(xlUp).Row
  i_count = 10001
  For i_count = 2 To i_count
     If Range("C" & i_count).Value > Range("B" & i_count).Value Then
       offset_value = Range("C" & i_count).Value - Range("B" & i_count).Value
       total_offset_value = total_offset_value + offset_value
     End If
  Next i_count

  et = Time()
  Range("E2").Value = total_offset_value
  Range("E3").Value = et - st

  MsgBox "Result: " & total_offset_value & Chr(10) & "Running time: " & et - st
End Sub