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("d:/demo/data.txt",'w',encoding = 'utf-8')
+# file.write("哇哈哈:1130")
+# file.close()
+# with open("d:/demo/data.txt",'a',encoding = 'utf-8') as file:
+    # file.write("坤坤：10\n")
+res = ""
+with open("d:/demo/data.txt",'r',encoding = 'utf-8') as file:
+    for data in file:
+        if "坤坤：10" in data:
+            data = data.replace("坤坤：10","坤坤：999")
+        res += data
+with open("d:/demo/data.txt",'w',encoding = 'utf-8') as file:
+    file.write(res)
+
+
+
+
+
+