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'
 # 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'
+n=""
 with open(r"C:\Users\EDZ\Desktop\test.txt","r",encoding="utf-8") as f:
 with open(r"C:\Users\EDZ\Desktop\test.txt","r",encoding="utf-8") as f:
-    a=f.read()
-    print(a)
-    for i in a:
-        if  "小强:12本" in a:
-            print("小强在数据里")
-            break
+    for i in f:
+        if  "小强:12本" in f:
+            i=i.replace("小强:12本","小强:11本")
+        n+=i
+with open(r"C:\Users\EDZ\Desktop\test.txt","w",encoding="utf-8") as f:
+    f.write(n)
\ No newline at end of file