save project

diy.py

+# 写入同学们的捐赠明细：
+file = (r'C:\Users\Administrator\Desktop\test.txt','w',encod='utf-8')as file:
+file.write('小兰：12本\n 小丽：11本\n 李文：9本\n 张伟：16本')
+file.close()
+
+# with open(r'C:\Users\Administrator\Desktop\test.txt','a',encoding='utf-8') as file:
+
+#     file.write('小强：12本\n李明：15本\n')
+#     file.close()
+with open(r'C:\Users\Administrator\Desktop\test.txt','a',encoding='utf-8') as file:
+    new_data=''
+    for data in file:
+        if '小强：12本' in data:
+            data = data.replace('小强:12本','小兰：14本')
+        new_data += data
+
+with open(r'C:\Users\Administrator\Desktop\test.txt','a',encoding='utf-8') as file:
+    file.write(new_data)
\ No newline at end of file

text.txt

+小兰：12本/n 小丽：11本/n 李文：9本/n 张伟：16本
\ No newline at end of file