auto save

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'
-#with open(r""C:\Users\MKCool\Desktop\test.txt"",'r',encoding = "utf-8") as file:
-    #a=file.read()
-    #print(a)
-    
-str.replace("小强:是10本","小强是11本")
-
-print(new_a)
+with open(r""C:\Users\MKCool\Desktop\test.txt"",'r',encoding = "utf-8") as file:
+    a=file.read()
+    print(a)
+    for data in a:
+        if"小红: 8000" in data:
+            print("数据在文件里")
+        else:
\ No newline at end of file
+            print("数据不在文件里")
\ No newline at end of file