How to split rows while printing a pattern in Python

Question

Input: 4, 4 output expected:

****
*..*
*..*
****

My output:

*
*
*
*
*
.
.
*
*
.
.
*
*
*
*
*

My code:

for i in range(1, 5):
         for j in range(1, 5):
            if i == 1 or i == 4 or j == 1 or j == 4:
                print("*")
            else:
                print(".")

yeah i'm sorry. I just joined this community so i hope you pardon my error. I'll be more careful the next time. — rash
– rash, Commented Nov 18, 2015 at 10:18
Possible duplicate of How to print in Python without newline or space? — MrHug
– MrHug, Commented Nov 18, 2015 at 10:32

Tom Zych · Accepted Answer · 2015-11-18 11:28:37Z

3

For a start you could try to do this:

for i in range(1, 5):
    for j in range(1, 5):
        if i == 1 or i == 4 or j == 1 or j == 4:
            print"*",
        else:
            print".",
    print ''

The ',' stops the print command from printing a \n.

UPDATE: Then, of course, add the line break after a completed row.

edited Nov 18, 2015 at 11:28

Tom Zych

13.7k9 gold badges38 silver badges55 bronze badges

answered Nov 18, 2015 at 10:11

rocksteady

2,5905 gold badges27 silver badges42 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

Psytho Over a year ago

You don't need '' in print '' in Python 2.x :) print is enough.

rocksteady Over a year ago

Thanks! it is kind of a "good style" for me personally. But maybe I change that into an even better style ;)

Akshay Hazari · Accepted Answer · 2015-11-18 11:23:47Z

2

This is in a line using reduce:

import sys
reduce(lambda x,z:reduce(lambda x,y : sys.stdout.write("*") if y == 1 or y == 4 or z==1 or z==4 else sys.stdout.write("."),range(1,5),None)or sys.stdout.write("\n"),range(1,5),None)

O/P :

****
*..*
*..*
****

Else try your way with loops:

for i in range(1, 5):
     for j in range(1,5):
             if i==1 or j==1 or i==4 or j==4:
                     sys.stdout.write("*")
             else:
                     sys.stdout.write(".")
     sys.stdout.write("\n")

Same O/P

edited Nov 18, 2015 at 11:23

answered Nov 18, 2015 at 11:01

Akshay Hazari

3,2874 gold badges56 silver badges98 bronze badges

2 Comments

Akshay Hazari Over a year ago

Reduce definitely takes lesser time than for loops. So this should be better

rash Over a year ago

hey yeah it is a bit advanced for me but i looked at it through the net and i got a vague idea of how it works. Nevertheless , thanks

Alex · Accepted Answer · 2015-11-18 10:09:10Z

1

You can store the output in a variable and only print it in the outside loop:

for i in range(1, 5):
     line = ""
     for j in range(1, 5):
        if i == 1 or i == 4 or j == 1 or j == 4:
            line = line + "*"
        else:
            line = line + "."
     print line

gives as output:

****
*..*
*..*
****

answered Nov 18, 2015 at 10:09

Alex

21.9k11 gold badges68 silver badges77 bronze badges

1 Comment

rash Over a year ago

Thank you , that was helpful

Collectives™ on Stack Overflow

How to split rows while printing a pattern in Python

3 Answers 3

2 Comments

2 Comments

1 Comment

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

2 Comments

2 Comments

1 Comment

Your Answer

Sign up or log in

Post as a guest

Linked

Related