Python Evaluation of Strings
Python code:
nums = [1,2,3,4]
equation = '+'.join(nums)
# yields '1+2+3+4' with type(equation) string
How to evaluate this? A simple int(equation) will not give you the answer of 10 that you want...
Answer: eval(equation) will give you the right answer.
Special newb Treatment:
# prints 10
print eval('1+2+3+4')
If nums is a list of integers, this will fail – join works only with strings. But with integers it’s easier (and faster) to use reduce:
| Posted 4 years, 9 months ago>>> nums = [1, 2, 3, 4]
>>> reduce( lambda a, b: (a + b), nums )
10