save project

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'
+file1=open(r'C:\Users\Administrator\Desktop\test.txt','w',encoding='utf-8')
+file1.write('小丽:11本')
+file1.write('李文:9本')
+file1.write('张伟:16本')
+file1.write('小兰:12本')
+
+
+file1.close()
+
+with open(r'C:\Users\Administrator\Desktop\test.txt','w',encoding='utf-8') as file:
+    file.write('小强:10本\n')
+    file.write('李明:12本\n')
+
+
+
+with open(r'C:\Users\Administrator\Desktop\test.txt','r',encoding='utf-8') as file1:
+    for data in file1:
+        if'小强:10本'in data:
+            print(数据在文件中)
+new_data=''
+with open(r'C:\Users\Administrator\Desktop\test.txt','r',encoding='utf-8') as file1:
+    for data in file1:
+        if'小强:10本'in data:
+            data=data.replace('小强:10本''小强:11本')
+        new_data+=data
+with open(r'C:\Users\Administrator\Desktop\test.txt','w',encoding='utf-8') as file1:
+file1.write(new_data)    
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