diy.py

# 写入同学们的捐赠明细：'小兰：12本'、'小丽：11本'、'李文：9本'、
# 创建文件
# file=open(r'C:\Users\Administrator\Desktop\test.txt','a',encoding='utf-8')
# with open(r'C:\Users\Administrator\Desktop\test.txt','w',encoding='utf-8') as file:
# 写入文件
    # file.write('小兰：12本\n')
    # file.write('小丽：11本\n')
# file.write('李文：9本\n')
# file.write('张伟：16本\n')

# 关闭
# file.close()
with open(r'C:\Users\Administrator\Desktop\test.txt','r',encoding='utf-8') as file:
    # a=file.read()
    # print(a)
    for data in file:
        if '小兰：12本' in data:
            print('在')