在运行时生成Python函数并使用字符串名称调用它们

Question

foo.py

def foo_001(para): tmp = para + 2 return tmp 
def foo_002(para): tmp = para * 2 return tmp 
def foo_003(para): tmp = para / 2 return tmp 

... 
def foo_100(para): tmp = #complex algo, return tmp 

main.py

from foo import * 
fun_name = ["foo_001","foo_002","foo_002" ... "foo_100"] 

src = 1 
rzt = []  
for i in fun_name: 
    rzt.extent(eval(i)(src))  

这是我的问题：

1. 我可以在运行时获取 fun_name 列表吗，因为我想将它们保存在文本文件中？

2. 我发现函数定义中有一个共同的部分，即“tmp = #algo”，我可以从这些定义中提取它们吗？我可以在运行时定义这些函数吗？我想要这样的东西：

foo.py

def foo_factory():  
    # in somehow 
    return adict      #function_name/function pair  

template = [ 
["foo_001","tmp = para + 2"], 
["foo_002","tmp = para * 2"], 
["foo_002","tmp = para + 2"], 
... 
["foo_100","tmp = #complex algo"] 

main.py

from foo import * 
dic = foo_factory(template) 
fun_name = dic.keys() 
src = 1 
rzt = []  
for i in fun_name: 
    rzt.extent(eval(i)(src))  
        #or 
    rzt.extent(dic(i)())

Answer 1

fnmap = {
  'foo_001': foo_001,
  'foo_002': foo_002,
  'foo_003': foo_003,
}

print fnmap['foo_002'](3)

如果您不想输入整个地图，请使用装饰器来枚举函数。