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'
+file=open(r'D:\Personal\Desktop\test.txt','w',encoding='utf-8')
+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')
+file.close()
+with open(r'D:\Personal\Desktop\test.txt','a',encoding='utf-8')as file:
+    file.write('小强:10本\n')
+    file.write('李明:15本\n')
+new_data=''
+with open(r'D:\Personal\Desktop\test.txt','r',encoding='utf-8')as file:
+    for data in file:
+        if '小强:10本'in data:
+            data=data.replace('小强:10本','小强:11本')
+        if '小兰:12本'in data:
+            new_data=data.replace('小兰:12本','小兰:14本')
+with open(r'D:\Personal\Desktop\test.txt','w',encoding='utf-8')as file:
+    file.write(new_data)
+with open(r'D:\Personal\Desktop\test.txt','r',encoding='utf-8')as file:
+    a=file.read()
+    print(a)     
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