Question

I want to basically turn a list element into a function with the do function. This way any pre-written funcction i can call by just use a do(list[x]).

What im trying to do is a function that takes away the quotes of a list element and then executes the function that is in that list element.

def func():
    print "python"

def func1():
    print "is"

def func2():
    print "awesome"

def do(fun):
    fun()
#I think the problem is here


funs = ['func()','func1()','func2()']

print ''.join(funs[0])
do(''.join(funs[0]))

Edit:

What im trying to do is a function that takes away the quotes of a list element and then executes the function that is in that list element

Answer 1

You don't need the extra functions, and you don't need to turn them into a string either:

def func():
    print "python"

def func1():
     print "is"

def func2():
     print "awesome"

funcs = [func, func1, func2]

for function in funcs:
    function()

Answer 2

Well, it basically works like this. Note that the list contains the functions themselves, not a string.

def func():
   print "python"

def func1():
    print "is"

def func2():
    print "awesome"

def do(fun):
    fun()

funcs = [func, func1, func2]

for function in funcs:
    do(function)

Output:

python
is
awesome

EDIT: If you do want the list to contain the functions' names as strings, use eval():

funcs = ['func', 'func1', 'func2']

for function in funcs:
    do(eval(function))

Answer 3

If you really want to execute arbitrarily named functions from a list of names in the current global/module scope then this will do:

NB: This does NOT use the potentially unsafe and dangerous eval():

Example:

def func():
    return "python"


def func1():
    return "is"


def func2():
    return "awesome"


def do(func_name, *args, **kwargs):
    f = globals().get(func_name, lambda : None)
    if callable(f):
        return f(*args, **kwargs)


funs = ["func", "func1", "func2"]

print "".join(funs[0])
print "".join(map(do, funs))

Output:

$ python foo.py
func
pythonisawesome

You can also individually call "named" functions:

>>> do(funs[0])
python

Note the implementation of do(). This could also be applied more generically on objects and other modules too swapping out globals() lookups.

Answer 4

正如上面的人所说的最好的方法是定义一个函数字典，因为函数是python中的对象，这是可能的

def One():
   pass
def Two():
   pass
functions = {"ONE":One, "TWO":Two}

然后你可以这样称呼它：

functions[input]()

如果你想给用户真正的控制（我不建议这样做）你可以使用eval函数。

eval(input+"()")

A function that calls X function

4 个答案: