[Python] How to correct my code to remove the empty list from the array?

Question

My code is:

arr1=[]
raw_input=()
print("enter:")
while raw_input is not'':
raw_input = input()
a1 = [int(n) for n in raw_input.split()]
arr1.append(a1)
print(arr1)

enter:
1 2 3
4 5 6
7 8 9

result:
[[1, 2, 3], [4, 5, 6], [7, 8, 9], []]

Answer 1

Hope this helps
https://code.sololearn.com/cGzNqC8odzbq/?ref=app

Answer 2

This may not be the most efficient way to do it, but what I would recommend doing is creating a for loop that loops through every value of the list while checking the value as it goes along. If it comes across a value that is equal to an empty list (if x == []), then you can use the del method (del list[list.index(x)], assuming x is the variable looping through the list) to delete that element.

Answer 3

Check if raw_input is not empty, combined with try ... except block for handling exceptions.

arr1 = []
print("Enter space delimited numbers:")
while True:
try:
raw_input = input()
if len(raw_input) < 1: break
a1 = [int(n) for n in raw_input.split()]
arr1.append(a1)
except(ValueError, TypeError):
print("Invalid input!")
print("Enter only space delimited numbers!")
break
except EOFError:
break
if len(arr1):
print(arr1)
else:
print("List is empty")