HOW TO: PYTHON: How do I get each set in a two dimensional list to print on on separate lines with t-CodePudding

I am working on a lab for a python course. My current code gives me most but not all points available for this lab. I can't quite seem to get the code to print correctly. I've tried many possible ways of printing the code. On my closest attempts, the printed output seems to be missing tabs at the end of each row. I would be most appreciative for any suggestions.

The assignment stated the following:

25.7 LAB: Hailstone sequence

Given a positive integer n, the following rules will always create a sequence that ends with 1, called the hailstone sequence:

If n is even, divide it by 2 If n is odd, multiply it by 3 and add 1 (i.e. 3n 1) Continue until n is 1 Write a program that reads an integer as input and prints the hailstone sequence starting with the integer entered. Format the output so that ten integers, each separated by a tab character (\t), are printed per line.

The output format can be achieved as follows: print(n, end='\t')

Ex: If the input is:

the output is:

25   76   38   19   58   29   88   44   22   11 
34   17   52   26   13   40   20   10   5    16 
8    4    2    1

Here is my code:

# Taking input from user
n = int(input())

#Creating Hailstone list:
hailstone_list = []
hailstone_list.append(int(n))
while n != 1:
    if n % 2 == 0:
        n = n/2
        hailstone_list.append(int(n))
    else:
        n = 3*n   1
        hailstone_list.append(int(n))
        
# I converted the hailstone list into a two-dimensional list called 
# "splits", where each set has up to 10 integers contained within them:
splits = [hailstone_list[i:i 10] for i in range(0,len(hailstone_list),10)]

#Different attempts made to get the output formatted correctly, 
#best attempt is the only one I have not commented out:
for sets in splits:
    print(*sets, sep='\t')

# for sets in splits:
#     print('\t'.join(map(str, sets)))

# for sets in splits:
#     [print(i, end='\t') for i in sets]

# [print(i, end='\t') for i in splits[0]]
# print()
# [print(i, end='\t') for i in splits[1]]
# print()
# [print(i, end='\t') for i in splits[2]]

On each example that I fail when the lab checks my code, the problem is always that the last integer on each row of 10 integers is not followed by a tab. How can I get that tab in there?

Example of the problem: If the input is:

My output is:

1024    512 256 128 64  32  16  8   4   2
1

But the expected output is:

1024    512 256 128 64  32  16  8   4   2
1

This isn't displaying properly, so here is a screenshot to show you what I mean: screenshot showing the lack of tabs at the end of each row

If I try using:

for sets in splits:
    print(*sets, end='\t\n', sep='\t')

Then this happens: Tabs are now added to the ends of the rows, but the last integer now has a tab and this causes me to fail every code test See example screenshot here

CodePudding user response：

One way you might be able to handle this is:

for sets in splits:
    print(*sets, end='\t\n', sep='\t')

Updated for new requirement. Not pretty but probably will work for the auto-grader thing:

for sets in splits:
    print(*sets, end='\t\n', sep='\t') if len(sets) == 10 else print(*sets, sep='\t')

CodePudding user response：

Ok, I finally got all of the points by altering the code like so:

# Added a num_sets figure to use in determining which format to apply
num_sets = 0
for sets in splits:
    num_sets  = 1

# An inelegant solution to printing the answer that gets all of the points.
for sets in splits:
# the if statement correctly formats a one row only answer
    if num_sets < 2:
        print(*sets, sep='\t')
# the elif statement formats an answer that has multiple rows of 10 
# integers, and/or one remaining row with less than 10 integers correctly
    elif len(sets) == 10:
        print(*sets, end='\t\n', sep='\t')
# The else statement formats answers that have less than 10 integers and 
# less than 2 rows correctly
    else:
        print(*sets, sep='\t')

Here is the same code without all of my comments explaining it:

num_sets = 0
for sets in splits:
    num_sets  = 1

for sets in splits:
    if num_sets < 2:
        print(*sets, sep='\t')
    elif len(sets) == 10:
        print(*sets, end='\t\n', sep='\t')
    else:
        print(*sets, sep='\t')

To be honest, I suspect this is not the elegant solution the course instructors were pushing me to find, so if anyone here can think of a better one, please feel free to share.