save project

1.py

+new_i=""
+file1=open(r'C:\Users\Administrator\Desktop\book.txt','r',encoding='utf-8') 
+for i in file1:
+    if "小强：10本" in i:
+        i=i.replace("小强：10本" ,"小强：11本" )
+    new_i+=i
+    if "小兰：12本" in i:
+        i=i.replace("小兰：12本" ,"小兰：14本" )
+    new_i+=i
+    print()
+file1.close()
+file1=open (r'C:\Users\Administrator\Desktop\book.txt','w',encoding='utf-8')
+file1.write(i)
+file1.close()
\ No newline at end of file

4.py

+file1=open (r'C:\Users\25236\Desktop\book.txt','w',encoding='utf-8')
+file1.write("小强：10本")
+file1.write("小兰：12本")
+file1.close()
\ No newline at end of file