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'
+with open(r'C:\Users\Windows 10\Desktop\qiangjianhaozi.txt','w',encoding='utf-8') as qiangjianhaozi:
+    qiangjianhaozi.write('小兰：12本\n')
+    qiangjianhaozi.write('小1：2本\n')
+    qiangjianhaozi.write('小2：72本\n')
+
+
+
+
+new=''# 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'
+with open(r'C:\Users\Windows 10\Desktop\qiangjianhaozi.txt','r',encoding='utf-8') as qiangjianhaozi:
+    for data in qiangjianhaozi:
+        if '小兰：12本' in data:
+            print("in")
+            data=data.replace('小兰：12本','小兰：10本')
+        new+=data
+    print(new)
+with open(r'C:\Users\Windows 10\Desktop\qiangjianhaozi.txt','w',encoding='utf-8') as qiangjianhaozi:
+    qiangjianhaozi.write(new)