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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\Public\Desktop\test.txt','a',encoding='utf-8') #file=open(r'C:\Users\Public\Desktop\test.txt','a',encoding='utf-8')
with open(r'C:\Users\Public\Desktop\test.txt','r',encoding='utf-8') as file: with open(r'C:\Users\Public\Desktop\test.txt','w',encoding='utf-8') as file:
# file.write('小兰:12本\n') file.write('小兰:12本\n')
# file.write('小丽:11本\n') file.write('小丽:11本\n')
# file.write('李文:9本\n') # file.write('李文:9本\n')
# file.write('张伟:16本\n') # file.write('张伟:16本\n')
# a=file.read() # a=file.read()
# print(a) # print(a)
for data in file: # for data in file:
if"张伟:16本"in data: # if"张伟:16本"in data:
print('在') # print('在')
\ No newline at end of file a=file.write(new_data)
with open(r'C:\Users\Public\Desktop\test.txt','w',encoding='utf-8') as file:
a=file.read()
print(a)
\ No newline at end of file
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