save project

diy.py

+new_date=''
+with open(r'C:\Users\Administrator\Desktop\test.txt','w',encoding='utf-8') as file:
+    file.write('小兰：12本\n')
+with open(r'C:\Users\Administrator\Desktop\test.txt','a',encoding='utf-8') as file:
+    file.write('小明：11本\n')
+    file.write('小强：14本\n')
+with open(r'C:\Users\Administrator\Desktop\test.txt','r',encoding='utf-8') as file:
+    for i in file:
+        if '小明：11本' in i:
+            i=i.replace('小明：11本','小明：12本')
+        new_date+=i
+with open(r'C:\Users\Administrator\Desktop\test.txt','w',encoding='utf-8') as file:
+    file.write(new_date)
\ No newline at end of file