diy.py

# 写入同学们的捐赠明细：'小兰：12本'、'小丽：11本'、'李文：9本'、'张伟：16本'
with open(r"C:\Users\CM\Desktop\test.txt","r",encoding="utf-8") as 
file1:
    for data in file1:
        if "小强:10本"in data:
            print("数据在文件中")