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=(r'C:\Users\1\Desktop\book.txt','w',encoding='utf-8')
+# write("小兰:12本","小丽:11本","李文:9本","张伟:16本")
+# with open(r"C:\Users\1\Desktop\book.txt",'w',encoding='utf-8') as file:
+#      file.write("小兰:12本\n小强:10本\n李文:9本\n张伟:16本\n")
+a=""
+with open(r"C:\Users\1\Desktop\book.txt",'r',encoding='utf-8')as file:
+    for data in file:
+        if "小兰:12本" in data:
+            data=data.replace("小兰:12本","小兰:14本")
+        a+=data
+    print(a)
+with open(r"C:\Users\1\Desktop\book.txt",'w',encoding='utf-8')as file:
+    file.write(a)
+
+            
+
+  
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