第三次课后作业

学号:2017*****7154；   姓名：齐山   码云项目仓库：https://gitee.com/qishan66/project/tree/master

 

代码；

from string import punctuation def process_file(dst):3     try:         f = open(dst)     except IOError, s:         print s         return None     try:         bvffer = f.read()     except:         print "Read File Error!"         return None     f.close()     return bvffer

def process_buffer(bvffer):     if bvffer:         word_freq = {}         for item in bvffer.strip().split():             word = item.strip(punctuation+' ')             if word in word_freq.keys():                 word_freq[word] += 1             else:                 word_freq[word] = 1         return word_freq

def output_result(word_freq):     if word_freq:         sorted_word_freq = sorted(word_freq.items(), key=lambda v: v[1], reverse=True)         for item in sorted_word_freq[:10]:             print item

if __name__ == "__main__":     import argparse     parser = argparse.ArgumentParser()     parser.add_argument('dst')     args = parser.parse_args()     dst = args.dst     bvffer = process_file(dst)     word_freq = process_buffer(bvffer)     output_result(word_freq)

 

 

在命令中输入python word_freq.py Gone_with_the_wind.txt运行代码

使用cProfile进行性能分析 python -m cProfile word_freq.py Gone_with_the_wind.txt

修改代码if word in word_freq.keys()修改为if word in word_freq 再次分析

系统得到了优化 运行速度明显加快了很多。