在python中从字符串获取函数

Question

是否可以定义如下所示的函数？你知道吗

text = "def x(a):\treturn a+1"
f = ??(text)
f(1)
>> 2

Answer 1

下面是另一个解决方案：

text = "def x(a):\treturn a+1"
f = {}
exec text in f
f['x'](1)
>> 2

Answer 2

您可以使用exec()

text = "def x(a):\treturn a+1"
exec(text)
print x(5) # gives 6

Answer 3

text = "lambda a: a + 1"
f = eval(text)
f(1)    # 2