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'
+new_data=''
+jzeng=open(r"C:\Users\Administrator\Desktop\mingxi.txt","w",encoding="utf-8")
+jzeng.write("小兰：12本")
+jzeng.close() 
+jzeng=open(r"C:\Users\Administrator\Desktop\mingxi.txt","a",encoding="utf-8")
+jzeng.write("小强：10本\n")
+jzeng.write("李明：15本\n")
+
+with open(r"C:\Users\Administrator\Desktop\mingxi.txt","r",encoding="utf-8") as jzeng:
+    for data in jzeng:
+        if '小强：10本'in data:
+            data=data.replace('小强：10本','小强：12本')
+        if '小兰：12本'in data:
+            data=data.replace('小兰：12本','小兰：14本')
+        # new_data=new_data+data
+        new_data+=data
+with open(r"C:\Users\Administrator\Desktop\mingxi.txt","w",encoding="utf-8") as jzeng:
+    jzeng.write(new_data)
+
+with open(r"C:\Users\Administrator\Desktop\mingxi.txt","r",encoding="utf-8") as jzeng:
+    print(jzeng.read())
+
+