save project

diy.py

-for i in range(1,10):
-    for j in range(1,i+1):
-        print(i,"*",j,"=",(i*j),end="  ")
-    print()
\ No newline at end of file
+new=""
+with open(r"C:\Users\Administrator\Desktop\book.txt","r",encoding="utf-8") as file:
+    for d in file:
+        if "小兰=10本" in d:
+            naw=d.replace("小兰=10本","小兰=12本")
+            new+=naw
+with open(r"C:\Users\Administrator\Desktop\book.txt","w",encoding="utf-8") as file:
+    file.write(new)
+with open(r"C:\Users\Administrator\Desktop\book.txt","r",encoding="utf-8") as file:
+    a=file.read()
+    print(a) 
+