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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' # # 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'
f=open(r'D:\test.txt','w',encoding='utf-8') # f=open(r'D:\test.txt','r',encoding='utf-8')
f.write('小兰：12本\n') # # f.write('小兰：12本\n')
f.write('小丽：11本\n') # # f.write('小丽：11本\n')
f.write('李文：9本\n') # # f.write('李文：9本\n')
# # f.close()
# f=open(r'D:\test.txt','r',encoding='utf-8')
# # f.write('张伟：16本\n')
# f.close() # f.close()
f=open(r'D:\test.txt','a',encoding='utf-8') with open(r'D:\test.txt','r',encoding='utf-8') as f:
f.write('张伟：16本\n') # f.write('小明：22本')
f.close() # ee
with open(r'D:\test.txt','a',encoding='utf-8') as f: for i in f:
f.write('小明：22本') if '小明：22本' in i :
\ No newline at end of file print("有")
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