Error in the code ->ValueError: could not convert string to float: ' '

[eagleboom]

This is the code:

fichero = open('cuerpos.txt')

doc = fichero.readlines()

for t in range(3, len(doc)):
    fila = doc[t].split('\n')

    if (len(fila) == 2):
        for i, e in enumerate(fila):
            v = (4 * 3, 14159265 / 3)*[b](float(fila[1]) / 2)[/b] * 2
            m = v * float(fila[0])
            print('Esfera de volumen', '%4.3f' % (v), 'y masa', '%4.3f' % (m))


    if (len(fila) == 3):
        for i, e in enumerate(fila):
            v = 3, 14159265 * [b]float(fila[1]) ** 2 * float(fila[2])[/b]
            m = v * float(fila[0])
            print('Cilindro de volumen', '%4.3f' % (v), 'y masa', '%4.3f' % (m))


    if (len(fila) == 4):
        for i, e in enumerate(fila):
            v =[b] float(fila[1]) * float(fila[2]) * float(fila[3])[/b]
            m = v *[b] float(fila[0])[/b]
            print('Paralelepipedo de volumen', '%4.3f' % v, 'y masa', '%4.3f' % m)

[ThomasL]

After fila = doc[t].split('\n') insert line print(fila) to look what fila is.
If float(fila[?]) throws an error than fila[?] is not a string which consists of digits.
I´m sure that the .split('\n') is false. Are you sure you want to split on end-of-line/carriage-return ?
Please show how your .txt file is structured.