diff --git a/py12306/helpers/qrcode.py b/py12306/helpers/qrcode.py
index fa984a2..ba83dec 100644
--- a/py12306/helpers/qrcode.py
+++ b/py12306/helpers/qrcode.py
@@ -65,13 +65,13 @@ def print_qrcode(path):
         black_block = '\033[0;37;40m  '
         new_line = '\033[0m\n'
 
-    print('', flush=False)
+    output = '\n'
     for i in range(module_count + 2):
-        print(white_block, end='', flush=False)
-    print('', end=new_line, flush=False)
+        output += white_block
+    output += new_line
     i = y_flag
     while i < height - y_flag:
-        print(white_block, end='', flush=False)
+        output += white_block
         j = x_flag
         while j < width - x_flag:
             total = 0
@@ -82,12 +82,13 @@ def print_qrcode(path):
             mid = (2 ** info['bitdepth']) / 2
             black = avg < mid
             if black:
-                print(black_block, end='', flush=False)
+                output += black_block
             else:
-                print(white_block, end='', flush=False)
+                output += white_block
             j += scale
-        print(white_block, end=new_line, flush=False)
+        output += white_block + new_line
         i += scale
     for i in range(module_count + 2):
-        print(white_block, end='', flush=False)
-    print('', end=new_line, flush=True)
+        output += white_block
+    output += new_line
+    print(output, end='', flush=True)
diff --git a/py12306/user/job.py b/py12306/user/job.py
index 5f8529a..38bad74 100644
--- a/py12306/user/job.py
+++ b/py12306/user/job.py
@@ -177,10 +177,14 @@ class UserJob:
             elif result_code == 2:
                 break
             elif result_code == 3:
+                try:
+                    os.remove(png_path)
+                except Exception as e:
+                    UserLog.add_quick_log('无法删除文件: {}'.format(e)).flush()
                 image_uuid = self.download_code()
         try:
             os.remove(png_path)
-        except BaseException as e:
+        except Exception as e:
             UserLog.add_quick_log('无法删除文件: {}'.format(e)).flush()
 
         self.session.get(API_USER_LOGIN, allow_redirects=True)
@@ -213,7 +217,7 @@ class UserJob:
                 UserLog.add_log(UserLog.MESSAGE_QRCODE_DOWNLOADED.format(png_path)).flush()
                 return result.get('uuid'), png_path
             raise KeyError('获取二维码失败: {}'.format(result.get('result_message')))
-        except BaseException as e:
+        except Exception as e:
             UserLog.add_quick_log(
                 UserLog.MESSAGE_QRCODE_FAIL.format(e, self.retry_time)).flush()
             time.sleep(self.retry_time)