save project

diy.py

+# with open(r'C:\Users\Administrator\Desktop\test.txt','a',encoding='utf-8') as f:
+    # f.write('小兰: 12本,小丽: 11本,李文 9本,张伟：16本,小强：12本,李明：15本')
+with open(r'C:\Users\Administrator\Desktop\test.txt','r',encoding='utf-8') as f:
+    for data in f:
+        if "小强：12本" in data:
+            print("数据已存在")
\ No newline at end of file

ss.py

+ 
+ 
+ 
+ f=open(r'C:\Users\Administrator\Desktop\test.txt','w',encoding='utf-8')
+ f.write('小兰: 12本,小丽: 11本,李文 9本,张伟：16本')
+ f.close()
\ No newline at end of file