save project

diy.py

+# 写入同学们的捐赠明细：'小兰：12本'、'小丽：11本'、'李文：9本'、'张伟：16本'
+file1= open(r'C:\Users\CM\Desktop\book.txt','w',encoding='utf-8')
+file1.write('小兰:12本\n')
+file1.write('小丽:11本\n')
+file1.write('李文:9本\n')
+file1.write('张伟:16本\n')
+file1.ciose()
\ No newline at end of file

diy2.py

+file1= open(r'C:\Users\CM\Desktop\book.txt','a',encoding='utf-8')
+file1.write('小强:10本\n')
+file1.write('李明:15本\n')
+file1.close()
\ No newline at end of file

diy3.py

+with open(r'C:\Users\CM\Desktop\book.txt','w',encoding='utf-8')
+    for data in file1:
+        if'小强:10本' in data:
+            print('小强数据在文件中')
+        if'小兰:12本' in data:
+            print('小兰数据在文件中')
\ No newline at end of file