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'
# file=open(r"C:\Users\丽达7号\Desktop\XM.txt","w",encoding="utf-8")
# file.write("小兰:12本\n")
# file.write("小利:11本\n")
# file.close()
with open(r"C:\Users\丽达7号\Desktop\XM.txt","r",encoding="utf-8")as file:
#      file.write("小兰:12本\n")
#      file.write("小利:11本\n") 
    for i in file:
        if "小兰：12本" in i:
            print("XL在里面")
        else:
            print("XL不在里面")