add length check for student_id

1 files changed, 1 insertions, 1 deletions

diff --git a/cscore b/cscore
index e6b9c188a194..f1a1ef693cec 100755
--- a/cscore
+++ b/cscore
@@ -109,7 +109,7 @@ def print_usage():
 if __name__ == '__main__':
     stu_id = None
     pwd = None
-    if len(sys.argv) == 1:
+    if len(sys.argv) == 1 and len(sys.argv[1]) == 9:
         stu_id = input('学号：')
         pwd = getpass.getpass('密码：')
     elif len(sys.argv) == 2: