diff --git a/工程化/类型申明/tf-24.py b/工程化/类型申明/tf-24.py
index c70f62e..1c060bb 100644
--- a/工程化/类型申明/tf-24.py
+++ b/工程化/类型申明/tf-24.py
@@ -25,6 +25,7 @@ def frequencies_(word_list):
 def sort_(word_freq):
     return word_freq.most_common()
 
+
 if __name__ == '__main__':
     word_freqs = sort_(frequencies_(extract_words_( testfilepath )))
     print_word_freqs(word_freqs)
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