save project

diy.py

@@ -5,5 +5,12 @@
 # file1.write('李文：9本\n')
 # file1.write('李文：9本\n')
 # file1.write('张伟：16本\n')
 # file1.write('张伟：16本\n')
 # file1.close()
 # file1.close()
-with open(r"C:\Users\Administrator\Desktop\test.txt",'a',encoding='utf-8')as file1:
-    file1.write('李明：10本\n')
+nuw_data=''
+with open(r"C:\Users\Administrator\Desktop\test.txt",'r',encoding='utf-8')as file1:
\ No newline at end of file
+    for data in filel:
+        if '李明：10本' in data:
+            data=data.replace('李明：10本','李明：12本')
+        nuw_data+=data
+  with open(r"C:\Users\Administrator\Desktop\test.txt",'w',encoding='utf-8')as file1:
+      file1.write(nuw_data)
+       print(nuw_data)
\ No newline at end of file