auto save

o.py

+d=''
+with open(r"d:\桌面\csss.txt",'w',encoding='utf-8')as file: 
+    file.write('a:13本\n')
+    file.write('b:10本\n')
+    file.write('c:15本\n')
+with open(r"d:\桌面\csss.txt",'r',encoding='utf-8')as file:
+    for i in file:
+        if 'a:13本' in i:
+            print(i)
+            i=i.replace('a:13本','a:14本')
+            print(i)
+        d+=i
+    print(d)
+# with open(r"d:\桌面\csss.txt",'w',encoding='utf-8')as file: 
+#     file.write(d)   
+