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jfmejiat
Asked: 2020-03-22 18:20:23 +0800 CST 2020-03-22 18:20:23 +0800 CST

How can I call a function inside another by importing it from another module?

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I am making a python program that allows me to calculate the area of ​​a polygon from its coordinates in the plane and for this I have three modules: input.py (to enter the number of sides of the polygon and the coordinates of the vertices), calculations.py (to get the area of ​​the polygon), and output.py (to display the coordinate pairs and the area of ​​the polygon with a message).

In the calculations.py module I have the following:

#cálculos.py

from salida import vértices

def área_polígono():
  n=len(vértices)
  área=0.0

  for i in range(n):
    j=(i+1)%n

    área+=vértices[i][0]*vértices[j][1]
    área-=vértices[j][0]*vértices[i][1]

  global área_polígono
  área_polígono=0.5*abs(área)

  return (área_polígono)

In the output.py module I have the following:

#salida.py

from entrada import x,y

def pares():
  """ Esta función permite mostrar los pares ordenados de coordenadas (xi,yi) de cada uno de los vértices del polígono. """

  global vértices
  vértices=list(zip(x,y))

  return(f"Pares= {vértices}")

print(pares())


from cálculos import área_polígono

def área_del_polígono():
  """ Esta función permite mostrar el valor del área del polígono. """

  return (f"El área del polígono es: {área_polígono} U^2" )

print(área_del_polígono())

When I run the program I get the following:

El área del polígono es: <function área_polígono at 0x7fcf4f7a69d0> U^2

What should I do to get the value of the area of ​​the polygon?

python-3.x

1 Answers

  1. Best Answer

    From what I see in the code you are not executing the polygon_area function itself. To execute a function require the parentheses () For example

    def funcion():
    global funcion
    funcion = 3.14
    return funcion


if __name__ == "__main__":
    print(f'Mi valor es : {funcion}')

    Response :Mi valor es : <function funcion at 0x000002CC5960C268>

    Now calling the function to be executed with ()

    def funcion():
    global funcion
    funcion = 3.14
    return funcion


if __name__ == "__main__":
    print(f'Mi valor es : {funcion()}')


respuesta: Mi valor es : 3.14

    As you can see now if I am calling execute function by using parentheses I hope my answer will help you :)

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