save project

diy.py

+a=open(r"C:\Users\Admin\Desktop\text.txt",'w',encoding='utf-8')
+a.write('小兰:12')
+a.close()
+#with open(r"C:\Users\Admin\Desktop\text.txt",'a',encoding='utf-8') as a:
+#    a.write('小兰:12\n')
+with open(r"C:\Users\Admin\Desktop\text.txt",'r',encoding='utf-8') as a:
+    f=a.read()
+    new_f=''
+    for i in f:
+        if '小兰:12' in f:
+            f=f.replace('小兰:12','小兰:10')
+        new_f+=f
+print(new_f)
+with open(r"C:\Users\Admin\Desktop\text.txt",'w',encoding='utf-8') as a:
+    a.write(new_f)
\ No newline at end of file