save project

star.py

-with open(r'C:\Users\gg\Desktop\book.txt','a',encoding='utf-8') as file1:
+new_data=""
+with open(r'C:\Users\gg\Desktop\book.txt','w',encoding='utf-8') as file1:
     file1.write('小兰：12本\n')
     file1.write('小强：10本\n')
     file1.write('李明：15本\n')
 with open(r'C:\Users\gg\Desktop\book.txt','r',encoding='utf-8') as file2:
-    a=file2.read()
-    for i in a:
-        if '小强：10本' in a:
-            print("aaaaa")
-        if '小兰：12本' in a:
-            print("aaaaa")
\ No newline at end of file
+# a=file2.read()
+    for data in file2:
+        if '小强：10本' in data:
+            data=data.replace('小强：10本','小强：11本')
+        if '小兰：12本' in data:
+            data=data.replace('小兰：12本','小兰：14本')
+        new_data+=data
+    print(new_data)
+with open(r'C:\Users\gg\Desktop\book.txt','w',encoding='utf-8') as file2:
+    file2.write(new_data)
\ No newline at end of file