来自字符串的Python调用函数

这个问题在这里已经有了答案：

通过使用其名称（字符串）调用模块的功能10个答案

---

你可以使用exec。 不推荐，但可行。

s = "func()"

exec s 

---

def func():
    print("hello")
s = "func"
eval(s)()

In [7]: s = "func"

In [8]: eval(s)()
hello

不建议！ 只是告诉你如何。

---

最安全的方法是：

In [492]: def fun():
   .....:     print("Yep, I was called")
   .....:

In [493]: locals()['fun']()
Yep, I was called

取决于上下文，您可能希望使用globals() 。

或者你可能想要设置这样的东西：

def spam():
    print("spam spam spam spam spam on eggs")

def voom():
    print("four million volts")

def flesh_wound():
    print("'Tis but a scratch")

functions = {'spam': spam,
             'voom': voom,
             'something completely different': flesh_wound,
             }

try:
    functions[raw_input("What function should I call?")]()
except KeyError:
    print("I'm sorry, I don't know that function")

你也可以将参数传递给你的函数la：

def knights_who_say(saying):
    print("We are the knights who say {}".format(saying))

functions['knights_who_say'] = knights_who_say

function = raw_input("What is your function? ")
if function == 'knights_who_say':
    saying = raw_input("What is your saying? ")
    functions[function](saying)
else:
    functions[function]()

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