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'
+#filel=open(r'C:\Users\Administrator\Desktop\book.txt','w',encoding='utf-8')
+#filel.write('小兰:12本')
+#filel.write('小丽:11本')
+#filel.write('李文:9本')
+#filel.write('张伟:16本')
+#filel.close()
+
+#with open(r'C:\Users\Administrator\Desktop\book.txt','a',encoding='utf-8')as filel:
+#                filel.write('小强:12本')
+#                filel.write('李明:15本')
+new_data=''
+with open(r'C:\Users\Administrator\Desktop\book.txt','r',encoding='utf-8')as file1:
+    for data in file1:
+        if '小强:10本'in data:
+            print('小强在')
+            data.replace('小强:10本,小强:11本')
+        if '小兰:12本'in data:
+            print('数据在文件中')
+            data.replace('小兰:12本,小兰:14本')
+with open(r'C:\Users\Administrator\Desktop\book.txt','w',encoding='utf-8')as file1:
+    data.write(new_data)
\ No newline at end of file