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Python调用作为参数的函数的方法

 2 years ago
source link: https://blog.xpgreat.com/p/function_parameter_dict/
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今天在做project的时候遇到一个需求，简单来说是给定一个未知的函数func和他的参数范围，需要用这些参数重复调用该函数，记录返回值。此时遇到的问题是不知道func有多少参数和传入参数的顺序，查阅文档后发现可以用参数字典给函数传参，现记录于此。

给定一个函数func，参数名列表param_names，参数列表params，多次调用该函数并记录返回值。

def func(a, b, c):
  print(a, b, c)

param_names = ['a', 'b', 'c']
params = [
  [1,2,3],
  [4,5,6],
  [7,8,9]
]
res = []

for para in params:
  func(**dict(zip(param_names, para)))

# Output:
1, 2, 3
4, 5, 6
7, 8, 9

使用itertools.product快速循环生成参数表

params = itertools.product(*list(params.values()))

这里的params是一个字典，key是参数名字，value是参数可选范围，比如"param1" :[0, 1, 2]。itertools.product可以接受多个list，需要用*list的形式解包传入参数。

Python

Licensed under CC BY-NC-SA 4.0


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