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(r'C:\Users\Administrator\Desktop\test.txt',"r",encoding='utf-8') as ww:
+    d=''
+    for data in ww:
+        if "小兰：12本" in data:
+            data=data.replace("小兰：12本","小兰：10本")
+        d=d+data
+    print(d)
+
+with open(r'C:\Users\Administrator\Desktop\test.txt',"w",encoding='utf-8') as ww1:
+    ww1.write(d)
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