from cppy.cp_util import *
from collections import Counter

class Pipe:
    def __init__(self, func, *args, kwargs=None):
        self.func = func
        # self.args, self.kwargs= None ,None 
        if args : self.args = args
        if kwargs: self.kwargs = kwargs
        # print( self.args, self.kwargs)

    def __or__(self, other):
        return other(self._value)        

    def __call__(self, data):
        self._value = self.func(data, *self.args, self.kwargs)

def read_file(filename):
    with open(filename, 'r') as f:
        return f.read()

def split_words(text):
    return re.findall(r'\b\w+\b', text.lower())

def count_words(words):
    return Counter(words)

def top_n_words(word_counts, n):
    return word_counts.most_common(n)


# 使用管道
pipe = Pipe(extract_file_words) | Pipe(get_frequencies) | Pipe(sort_dict) | Pipe(print_word_freqs, 5)
result = pipe(testfilepath)
print(result)