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'
-cxs=open("C:\\Users\\TH\\Desktop\\cxs.txt","w",encoding="utf-8")
+cxs=open("C:\\Users\\Administrator\\Desktop\\cxs.txt","w",encoding="utf-8")
 cxs.write("小兰：12本\n小丽：11本\n李文：9本\n张伟：16本")
 cxs.close()
-cxs=open("C:\\Users\\TH\\Desktop\\cxs.txt","a",encoding="utf-8")
-cxs.write("\n小强:13本\n李明:99本")
\ No newline at end of file
+cxs=open("C:\\Users\\Administrator\\Desktop\\cxs.txt","a",encoding="utf-8")
+cxs.write("\n小强:10本\n李明:99本")
+cv=""
+with open("C:\\Users\\Administrator\\Desktop\\cxs.txt","r",encoding="utf-8") as cxs: 
+    # w=cxs.read()
+    for data in cxs: 
+        if "小强:10本" in data:
+            data=data.replace("小强:10本","小强:11")
+        print(data)
+        cv+=data
+
+with open("C:\\Users\\Administrator\\Desktop\\cxs.txt","w",encoding="utf-8") as cxs:
+    cxs.write(cv)