Python error when calling NumPy from class method with map

Question

The following code throws me the error:

Traceback (most recent call last):
  File \"\", line 25, in 
    sol = anna.main()
  File \"\", line 17, in         


        

Answer 1

You can replace numpy by the built in function math.sqrt like this:

import math  

class anaconda():

    def __init__(self):
        self.mice = range(10000)

    def eat(self, food):
        calc = math.sqrt(food ** 5)
        return calc

    def main(self):

        sol = list(map(self.eat, self.mice))
        return sol


if __name__ == '__main__':
    anna = anaconda()
    sol = anna.main()
    print(len(sol))

I think that the problem of your code is that you are probably reaching a limit (not sure yet why it raises that confusing error) because 10000**5 is a reeeally big number. You can check this out by reducing your range(10000) to range(1000). You will notice that your code runs perfectly fine then:

import numpy as np  

class anaconda():

    def __init__(self):
        self.mice = range(1000)

    def eat(self, food):
        calc = np.sqrt((food ** 5))
        return calc

    def main(self):

        sol = list(map(self.eat, self.mice))
        print sol
        return sol


if __name__ == '__main__':
    anna = anaconda()
    sol = anna.main()
    print(len(sol))

This runs perfectly fine, just by reducing range(10000) to range(1000)