save project

diy.py

+c=""
+# 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\fff.txt","r",encoding ="utf-8") as a:
+    for i in a:
+        b=a.read()
+        if "小兰:12本" in b:
+            b.replace("小兰:12本","小兰:14本")
+        c+=b
+with open(r"C:\Users\Administrator\Desktop\fff.txt","w",encoding ="utf-8") as a:
+    a.write(c)
+with open(r"C:\Users\Administrator\Desktop\fff.txt","r",encoding ="utf-8") as a:
+    d=a.read()
+    print(d)
\ No newline at end of file