save project

diy.py

+new_data=''
+with open(r"C:\Users\65415\Desktop\book.txt",'r',encoding='utf-8')as fiel1:
+    for data in fiel1:
+        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
+with open(r"C:\Users\65415\Desktop\book.txt",'w',encoding='utf-8')as fiel1:
+    fiel1.write(new_data) 
+with open(r"C:\Users\65415\Desktop\book.txt",'w',encoding='utf-8')as fiel1:
+    a=fiel1.read()
+    print(a)
\ No newline at end of file