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from cppy . cp_util import *
# 装饰器改写类
# - 找到以f_开头的方法
# - 将方法函数的返回值赋值给对象的data属性
# - 返回对象自身
def return_self_decorator ( cls ) :
def return_self ( func ) :
# 定义一个闭包函数，用于接收参数
def wrapper ( self , * args , * * kwargs ) :
self . data = func ( self , * args , * * kwargs )
return self # 返回类自身
return wrapper
for name , method in cls . __dict__ . items ( ) :
# 判断属性是否可调用，
if callable ( method ) and name . startswith ( ' f_ ' ) :
# 为类改写属性，将封装后的函数赋值
setattr ( cls , name , return_self ( method ) )
return cls
@return_self_decorator
class Flow ( ) :
def test ( self ) :
return ' test '
def f_extract_file_words ( self , filepath ) :
return extract_file_words ( filepath )
def f_get_frequencies ( self ) :
return get_frequencies ( self . data )
def f_sort_dict ( self ) :
return sort_dict ( self . data )
def f_print_word_freqs ( self , n ) :
print_word_freqs ( self . data , n )
# 顺序调用
Flow ( ) . f_extract_file_words ( testfilepath ) . f_get_frequencies ( ) . f_sort_dict ( ) . f_print_word_freqs ( 10 )
'''
改写后，参与 function flow 功能的方法
- 需要以 ' f_ ' 开头
- 类方法默认不写第一个参数，数据都在 .data 里面
仍旧需要特殊的方法写法
所以，还是 1，
'''
