style(5-1): 优化 print 语句格式

-将 print 语句中的格式化字符串改为使用 format 方法
- 提高了代码的可读性和兼容性

5-1.py

@@ -119,7 +119,7 @@ def fast_cosine_similarity(record):
 similarities_full_rdd = common_tokens.map(fast_cosine_similarity).cache()
 
 # 查看结果
-print(f"Number of similarity records: {similarities_full_rdd.count()}")
+print("Number of similarity records: {}".format(similarities_full_rdd.count()))
 
 # 计算并测试相似度
 similarity_test = similarities_full_rdd.filter(lambda x: x[0][0] == 'b00005lzly' and x[0][1] == 'http://www.google.com/base/feeds/snippets/13823221823254120257').collect()