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'
+a=open(r"C:\Users\LX\Desktop\wen.txt",'w',encoding='utf-8')
+a.write("小强:10本\n")
+a.write("李明:15本\n")
+a.close()
+with open(r"C:\Users\LX\Desktop\wen.txt",'a',encoding='utf-8') as a:
+    a.write("小兰:12本\n")
+with open(r"C:\Users\LX\Desktop\wen.txt",'r',encoding='utf-8') as a:
+    c=a.read()
+    print(c)
+new_i=''
+with open(r"C:\Users\LX\Desktop\wen.txt",'r',encoding='utf-8') as a:
+    for i in a:
+        if "小强:10本" in i:
+            i=i.replace('小强:10本','小强:11本')
+        new_i +=i
+with open(r"C:\Users\LX\Desktop\wen.txt",'w',encoding='utf-8') as a:
+    a.write(new_i)
\ No newline at end of file