Python中的Python调用函数

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s ="func"

现在假设有一个函数叫func。当函数名作为字符串给出时，我如何在Python 2.7中调用func ?

最安全的方法是:

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

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

根据上下文的不同，您可能希望使用globals()。

或者，你可能想要这样设置:

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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")

你也可以把参数传入你的函数a la:

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

In [7]: s ="func"

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

不推荐!只是告诉你怎么做。