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'
+file1=open(r'C:\Users\Administrator\Desktop\book.txt','w',encoding='utf-8')
+file1.write('小兰：12本'"\n"'小丽：11本'"\n"'李文：9本'"\n"'张伟：16本\n')
+file1.close()
+file1=open(r'C:\Users\Administrator\Desktop\book.txt','a',encoding='utf-8')
+file1.write("小强: 12本\n""李明: 15本")
+file1.close()
+sr=''
+with open(r'C:\Users\Administrator\Desktop\book.txt','r',encoding='utf-8')as file1:
+    for i in file1:
+        if "小强: 12本" in i:
+            i.replace("小强: 12本","小强: 14本")
+            print(i)
+        sr+=i;
+with open(r'C:\Users\Administrator\Desktop\book.txt','w',encoding='utf-8')as file1:
+    file1.write(sr)
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