save project

diy.py

-file=open(r'C:\Users\Jim\Desktop\text.txt','w'encoding='utf-8')
-file.write('小兰：')
\ No newline at end of file
+file=open(r'C:\Users\Jim\Desktop\text.txt','w',encoding='utf-8')
+file.write('小兰：12本\n')
+file.write('小丽：11本\n')
+file.write('李文：9本\n')
+file.write('张伟：16本\n')
+file.close()
+
+with open(r'C:\Users\Jim\Desktop\text.txt','a',encoding='utf-8')as file:
+        file.write('小红：10本')
+
+with open(r'C:\Users\Jim\Desktop\text.txt','r',encoding='utf-8')as file:
+    for i in file:
+        if'小红：10本'in i:
+            print("在文件中")
+
+