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'
+# file=open(r'C:\Users\5号电脑\Desktop\bell.txt','w',encoding='utf-8')
+# 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')
+# file.close()
+# with open(r'C:\Users\5号电脑\Desktop\bell.txt','a',encoding='utf-8') as file:
+#     file.write('小明:15本\n')
+new_data=''
+with open(r'C:\Users\5号电脑\Desktop\bell.txt','r',encoding='utf-8') as file:
+    for data in file:
+        if '小丽:11本' in data:
+            data=data.replace('小丽:11本','小丽:12本')
+            new_data+=data
+        print(new_data)
+    with open(r'C:\Users\5号电脑\Desktop\bell.txt','r',encoding='utf-8') as file:
+        file.write(new_data)
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