save project

diy4.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'
+q=""
+mingxi=open(r"C:\Users\Administrator\Desktop\jvanzeng.txt","w",encoding="utf-8")
+mingxi.write("小兰：12本\n""小丽：11本\n""李文：9本\n""张伟：16本\n")
+mingxi.close()
+with open(r"C:\Users\Administrator\Desktop\jvanzeng.txt","a",encoding="utf-8") as mingxi:
+    mingxi.write("小强：10本\n""李明：15本\n")
+with open(r"C:\Users\Administrator\Desktop\jvanzeng.txt","r",encoding="utf-8") as mingxi:
+    for a in mingxi:
+        if "小强：10本"in a:
+            a=a.replace("小强：10本","小强：11本")
+        q+=a
+with open(r"C:\Users\Administrator\Desktop\jvanzeng.txt","w",encoding="utf-8") as mingxi:
+    mingxi.write(q)
+with open(r"C:\Users\Administrator\Desktop\jvanzeng.txt","r",encoding="utf-8") as mingxi:
+    print(mingxi.read())