Python - 有没有办法可以使用 Openpyxl 动态播放 Excel 文件中的数据

Question

What can I do to make this work? This program executes successfully but shows this error
if (sh2.cell(r+1,c).value) > 500: TypeError: '>' not supported between instances of 'NoneType' and 'int' All it does is, selects Price that are greater than $500 and color codes the cells in the Excel.

import openpyxl
from openpyxl.styles import PatternFill

wb1 = openpyxl.load_workbook("C:\\Users\\Ricky\\Desktop\\UpdatedStock_ex2.xlsx")
sh2 = wb1.active

for r in range(1,sh2.max_row+2):
    for c in range(1,sh2.max_column+1):
        if (sh2.cell(row=1, column=c).value) == "Price":
             if (sh2.cell(r+1,c).value) > 500:
                print(sh2.cell(r+1,c).value)
                sh2.cell(r+1, c).fill = PatternFill("solid","71FF35")
               

wb1.save("C:\\Users\\Ricky\\Desktop\\UpdatedStock_ex2.xlsx")
print("file Saved")

Answer 1

if (sh2.cell(r+1,c).value) > 500: - will throw an exception if sh2.cell(r+1,c).value is None (which is Pythons equivalent of null).

The value will most likely contains None because you're looping throw a rage of sh2.max_row+2 ( you probably don't need the + 2 )

One solution to get around this issue is to always check value is not null by using if sh2.cell(r+1,c).value and... . For example if sh2.cell(r+1,c).value and (sh2.cell(r+1,c).value) > 500:

Alternatively you can set a default of 0 using or operator. Eg: if (sh2.cell(r+1,c).value or 0) > 500:

import openpyxl
from openpyxl.styles import PatternFill

wb1 = openpyxl.load_workbook("C:\\Users\\Ricky\\Desktop\\UpdatedStock_ex2.xlsx")
sh2 = wb1.active

for r in range(1,sh2.max_row+2):
    for c in range(1,sh2.max_column+1):
        if (sh2.cell(row=1, column=c).value) == "Price":
             # Commented out line below to check not None and value is greater than 500.
             # if sh2.cell(r+1,c).value and (sh2.cell(r+1,c).value) > 500:
             # Code below will convert None to 0 and prevent exception.
             if (sh2.cell(r+1,c).value or 0) > 500:
                print(sh2.cell(r+1,c).value)
                sh2.cell(r+1, c).fill = PatternFill("solid","71FF35")
               

wb1.save("C:\\Users\\Ricky\\Desktop\\UpdatedStock_ex2.xlsx")
print("file Saved")