再简单的代码也要亲手敲一遍

少年丶喝酒不

#12 Created at ... [Delete] [Delete and Lock User]

这个确实可以，函数参数要相同

Sandamu

#13 Created at ... [Delete] [Delete and Lock User]

>>> def same(x, *fs):
...     s = ['error' if (f == sqrt) and (x < 0) or (f == abs) and (x > 0) else f(x) for f in fs]
...     return s
... 


借用你的代码，针对输入错误进行判断，然后输出错误

武邵华

#14 Created at ... [Delete] [Delete and Lock User]

你这个不对，存在Bug,我们都知道，求一个正数的绝对值是没有意义的，那么问题也就来了，你这个方法传递一个负数作为参数就不行了，因为在sqrt方法求值时就出错了，一个负数是没有平方根的...

代码优化如下：

#!/usr/bin/python
# -*- coding: utf-8 -*-
# 引入数学模块中的方法
from math import sqrt
from math import tan

'''
高阶函数应用，返回一个数字不同方法计算结果
'''
def same(num, *kw):
    # 参数检查
    if not isinstance(num, (int, float)):
        raise TypeError('bad operand type')

    # 初始化结果字典
    rel = {}
    # 循环计算可变参数
    for func in kw:
        try:
            rel[str(func)[str(func).find('function ') + 9: -1]] = func(num)
        except ValueError:
            rel[str(func)[str(func).find('function ') + 9: -1]] = 'None'
    # 返回结果字典
    return rel

# 函数调用
result = same(-10.5, sqrt, abs, tan)
# 结果输出
print result

{'tan': -1.8498999934219273, 'abs': 10.5, 'sqrt': 'None'}

治愈系小行星3

#15 Created at ... [Delete] [Delete and Lock User]

k看成，求一个可爱的参数..... MM这个可爱么哈哈

Young先森森

#16 Created at ... [Delete] [Delete and Lock User]

def do_sth(x=[],*func): return [f(x_k) for x_k in x for f in func] print(do_sth([1,2,4,9],abs,sqrt))

for x_k in x 和for f in func位置互换不影响结果吗?

彼岸_仙人掌

#17 Created at ... [Delete] [Delete and Lock User]

这波必须给满分！

董DHH董

#18 Created at ... [Delete] [Delete and Lock User]

想法不错

九_努力成为BetterMe

#19 Created at ... [Delete] [Delete and Lock User]

def same(x, *fs):
    s = [f(x) for f in fs]
    return s
def f1(a):
    return a+1
def f2(b):
    return b+2

print(same(2,f1,f2))

试了一下，函数个数可变，只要定义的函数参数数目类型一致，且实际传入函数参数的数目和类型也满足要求即可。

GUK0

#20 Created at ... [Delete] [Delete and Lock User]

不需要参数个数和函数个数一样，只要像这样修改下

from math import sqrt
from math import tan

def func(x=[],*fs):
    return [[f(x1) for f in fs] for x1 in x]

print(func([5,6,7,8,9],sqrt,abs,tan))

vv阿甘vv

#21 Created at ... [Delete] [Delete and Lock User]

一开始看不懂，后来仔细想想，*fs应该是前面讲的可变参数，传入两个参数，一个开方，一个求绝对值，自己打了一遍，果然是酱紫，你们都好厉害

再简单的代码也要亲手敲一遍

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