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\123.txt','w',encoding='utf-8')
+filel.write('小兰：12本\n')
+filel.close()
+with open(r'C:\Users\Administrator\Desktop\123.txt','a',encoding='utf-8') as filel:
+    filel.write('小强:10本\n')
+    filel.write('李明:15本\n')
+new_data=''
+with open(r'C:\Users\Administrator\Desktop\123.txt','r',encoding='utf-8') as filel:
+    for data in filel:
+        if'小强:10本'in data:
+            data=data.replace('小强:10本','小强11本')
+        new_data+=data
+
+with open(r'C:\Users\Administrator\Desktop\123.txt','w',encoding='utf-8') as filel:        
+    filel.write(new_data)
+    print(new_data)
+