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'
+new_date=''
+# with open(r"C:\Users\PC\Desktop\num.txt","w",encoding = "utf-8") as file:
+#     file.write('小兰：12本\n')
+#     file.write('小丽：11本\n')
+#     file.write('李文：9本\n')
+#     file.write('张伟：16本\n')
+with open(r"C:\Users\PC\Desktop\num.txt","r",encoding = "utf-8") as file1:
+    for date in file1:
+        if '张伟：16' in date:
+            date=date.replace('张伟：16','张伟：17')
+        new_date+=date
+print(new_date)
+with open(r"C:\Users\PC\Desktop\num.txt","w",encoding = "utf-8") as file1:
+    file1.write(new_date)
\ No newline at end of file