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'C:\Users\Administrator\Desktop\新建文本文档.txt','w',encoding='utf-8')
+#a.write('小兰:12本\n小丽:11本\n李文:9本\n张伟:16本')
+#a.close()
+ab_=""
+with open(r'C:\Users\Administrator\Desktop\新建文本文档.txt','r',encoding='utf-8') as b:
+    for a in b:
+        if "小强:12本" in a:
+            a=a.replace('小强:12本','小强:10本')
+        if "小兰" in a:
+            a=a.replace('小兰:12本','小兰:14本')
+            ab_+=a
+with open(r'C:\Users\Administrator\Desktop\新建文本文档.txt','w',encoding='utf-8') as b:
+    b.write(ab_)
+with open(r'C:\Users\Administrator\Desktop\新建文本文档.txt','r',encoding='utf-8') as b:
+    c=b.read()
+    print(c)
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