save project

l.py

 # file=open(r"D:\abc.txt","w",encoding="utf-8")
-# file.write('小兰：12本n/')
+# file.write('小兰：12本\n')
 # file.close()
-with open(r"D:\abc.txt","a",encoding="utf-8") as file:
-    file.write('小强：12本n/')
+#with open(r"D:\abc.txt","a",encoding="utf-8") as file:
+#    file.write('小强：10本\n')
     
-
+with open(r"D:\abc.txt","r",encoding="utf-8") as file:
+    for data in file:
+        if "小强：10本" in data:
+            print('数据在其中')