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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'
#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:
#file.write('小兰：12本') # file.write('小强：10本\n')
#file.write('小强：15本\n') # file.write('小明：15本\n')
#file.write('李明：15本\n') # with open(r'C:\Users\Administrator\Desktop\test.txt','r',encoding='utf-8') as file:
#file.close() # a=file.read()
with open(r"C:\Users\Administrator\Desktop\test.txt",'w',encoding='utf-8') as file: # print(a)
file.write('小丽：11本\n') with open(r'C:\Users\Administrator\Desktop\test.txt','r',encoding='utf-8') as file:
file.write('李文：9本\n') for i in file:
file.write('张伟：16本\n') if '小强：10本' in i:
print("找到了")
\ No newline at end of file
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