save project

diy.py

@@ -5,12 +5,20 @@
 # a.write('\n李文：9本')
 # a.write('\n张伟：16本')
 # a.close()
-with open(r"C:\Users\EDZ\Desktop\tiancai.txt","a",encoding="utf-8") as a:
+c=""
+with open(r"C:\Users\EDZ\Desktop\tiancai.txt","r",encoding="utf-8") as a:
     # a.write('\n小兰：12本')
     # a.write('\n小丽：11本')
     # a.write('\n李文：9本')
     # a.write('\n张伟：16本')
     for i in a:
-        b=a.read()
-        if '小兰：12本' in b:
-            print("在里面")
\ No newline at end of file
+        if '小兰：12本' in b:  
+            b.replace('小兰：12本','小兰：10本')
+        c=b
+
+
+with open(r"C:\Users\EDZ\Desktop\tiancai.txt","w",encoding="utf-8") as a:
+    a.write(c)
+with open(r"C:\Users\EDZ\Desktop\tiancai.txt","w",encoding="utf-8") as a:
+    d=a.read()
+    print(d)
\ No newline at end of file