auto save

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'
+
+a=open(r'/Users/edz/Desktop/book.txt','w',encoding='utf-8')
+a.write('小兰:12本\n')
+a.write('小丽:11本\n')
+a.write('李文:9本\n')
+a.write('张伟:16本\n')
+a.close()
+
+# a2=open(r'/Users/edz/Desktop/book.txt','a',encoding='utf-8')
+# a2.write('小强:12本\n')
+# a2.write('李明:15本\n')
+# a2.close()
+
+with open(r'/Users/edz/Desktop/book.txt','a',encoding='utf-8') as a3:
+    a3.write('小强:12本\n')
+    a3.write('李明:15本\n')
+
+a4=open(r'/Users/edz/Desktop/book.txt','r',encoding='utf-8')
+input_read=a4.read()
+print(input_read)
+a4.close()
+
+with open(r'/Users/edz/Desktop/book.txt','r',encoding='utf-8') as a5:
+    for book in a5:
+        if '小强:12本' in book:
+            print('122121')
+
+