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("C:\\Users\\Administrator\\Desktop\\test.txt","a",encoding="utf-8") as a:
+#    a.write('小兰：20本\n小丽：11本\n李文：9本\n张伟：16本\n小强：12本\n李明：15本')
+b=""
+with open("C:\\Users\\Administrator\\Desktop\\test.txt","r",encoding="utf-8") as a:
+    for i in a:        
+        if "小强：10本" in i:
+            print("在文件中")
+            i=i.replace("小强：10本","小强：11本")
+        b=b+i
+with open("C:\\Users\\Administrator\\Desktop\\test.txt","w",encoding="utf-8") as a:
+    a.write(b)
+with open("C:\\Users\\Administrator\\Desktop\\test.txt","r",encoding="utf-8") as a:
+    print(a.read())
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