Printing like a table in phyton

Question

I have the following code:

import sys
import math

def number(x):
if x==0:
return "Cero"
return "Positivo" if x > 0 else "Negativo"

def main():

try:
list=["4","0","-12","0.0","0","-1"] #input("Please, enter only a list of number separated by a comma.If you enter another key the program will end.\n").split(",")
list2=[]
j=0

for i in range(len(list)):

list2.append(list[i])
j+=1
list2.append(" ")
list2.append(number(float(list[i])))
j+=1
a=1
print("INPUT"+" "+"OUTPUT")
while a <len(list2):
print(list2[a-1], list2[a])
a+=1

except ValueError:
sys.exit("Invalid input. Program ends.")

if __name__== "__main__" :
main()

I want to obtain a table like this

INPUT OUTPUT
4 Positivo
0 Cero
-12 Negativo
0.0 Cero
0 Cero
-1 Negativo

Can please someone help me?

Answer 1

Rosana Rodríguez Milanés , see my previous post to test how the output is working.

Answer 2

This is a short test. You can use it to see how it works.

def number(num):
if num == 0:
return 'Cero'
return "Positivo" if num > 0 else "Negativo"

lst = ["4","0","-12","0.0","0","-1"]

print(f"{'INPUT':6} {'OUTPUT'}")
for i in lst:
print(f"{i:>5} {number(float(i))}")

Answer 3

You have to use String formatting in python .
For ex : print("{10d}".format(value))
Will print the value of value ...upto 10 digits no matter the actual no of digits in the value . So u will have a nice formatted table .

More on this here. :
https://www.w3schools.com/python/ref_string_format.asp

Answer 4

Hi, guys, I found a problem in the code, so I made some change and he output is better:

import sys
import math

def number(x):
if x==0:
return "Cero"
return "Positivo" if x > 0 else "Negativo"

def main():

try:
list=["4","0","-12","0.0","0","-1"] #input("Please, enter only a list of number separated by a comma.If you enter another key the program will end.\n").split(",")
list2=[]
j=0

for i in range(len(list)):

list2.append(list[i])
j+=1
list2.append(number(float(list[i])))
j+=1
a=1
print("INPUT"+" "+"OUTPUT")
while a <len(list2):
print("{} {}".format(list2[a-1],list2[a]),end="\n")
a+=2

except ValueError:
sys.exit("Invalid input. Program ends.")

if __name__== "__main__" :
main()

OUTPUT:
INPUT OUTPUT
4 Positivo
0 Cero
-12 Negativo
0.0 Cero
0 Cero
-1 Negativo

However, I want to line up the value much better. Any suggestion?