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\玛酷机器人\Desktop\新建文件夹\test.txt','w',encoding='utf-8')
+filel.write('小兰:12本\n')
+filel.write('小丽:11本\n')
+filel.write('李文:9本\n')
+filel.write('张伟:16本\n')
+filel.write('小强:12本\n')
+filel=open(r'C:\Users\玛酷机器人\Desktop\新建文件夹\test.txt','a',encoding='utf-8')
+filel.write('李明:15本\n')
+filel.close()
+with open(r'C:\Users\玛酷机器人\Desktop\新建文件夹\test.txt','a',encoding='utf-8') as filel:
+    filel.write('小明:14本\n')
+b=''
+with open(r'C:\Users\玛酷机器人\Desktop\新建文件夹\test.txt','r',encoding='utf-8') as filel:
+    for i in filel:
+        if '小强:12本' in i:
+            a=a.replace('小强:12本','小强:11本')
+        b+=a
+   with open(r'C:\Users\玛酷机器人\Desktop\新建文件夹\test.txt','w',encoding='utf-8') as filel:
+       filel.write(b)