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 ("C:\\Users\\Administrator\\Desktop\\book.txt","w",encoding="utf-8")
+new_a = "" 
+with open("C:\\Users\\Administrator\\Desktop\\book.txt","r",encoding="utf-8")as filel:
+    for a in filel:
+        if "李明:15本" in a :            
+            a=a.replace('李明:15本','李明:25本')
+        new_a += a
+with open("C:\\Users\\Administrator\\Desktop\\book.txt","w",encoding="utf-8")as filel:
+    filel.write(new_a)
+with open("C:\\Users\\Administrator\\Desktop\\book.txt","r",encoding="utf-8")as filel:
+    b=filel.read()
+    print(b)
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