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'
+# a=open(r'D:\DESK\test.txt',"w",encoding="utf-8")
+# a.write("小丽：11本")
+# a.write("张伟：16本\n")
+# with open(r'D:\DESK\test.txt',"a",encoding="utf-8") as a:
+#     a.write("小兰：12本\n")
+# with open(r'D:\DESK\test.txt',"r",encoding="utf-8") as a:
+#     for data in a:
+#         if "小兰：12本" in data:
+#             print("数据在文件中")
+new_data=""
+with open(r'D:\DESK\test.txt',"r",encoding="utf-8") as a:
+    for data in a:
+        data=data.replace("小兰：12本","小兰：14本")
+        new_data+=data
+print(new_data)
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