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Python

Posted by Daniel Kaczmarczyk
Daniel Kaczmarczyk
Courses Plus Student 5,536 Points

mapping.py problem

"OK, here's a...weird...set of tiles. I need you to loop through TILES and print out each item. Print each item on the same line unless the item is a double pipe (||). In that case, instead of printing the item, print a new line (\n). Use the end argument to print() to control whether things print on a new line or not."

I have seen many questions regarding this challenge here, and I have followed each and every advice, yet the challenge still isn't passing. It does work as expected on my local machine, though. Here's my code:

TILES = ('-', ' ', '-', ' ', '-', '||',
         '_', '|', '_', '|', '_', '|', '||',
         '&', ' ', '_', ' ', '||',
         ' ', ' ', ' ', '^', ' ', '||'
)
for tile in TILES:
    if tile != "||":
        print(tile, end="")
    else:
        print("\n")

7 Answers

James J. McCombie
.a{fill-rule:evenodd;}techdegree seal-36
James J. McCombie
Python Web Development Techdegree Graduate 21,199 Points

hello,

since the default for end in print() is a new line, in your else statement you are really calling print('\n', end='\n'), printing two new lines. Maybe in the else just call print().

This is probably a challenge right? there is no link to the actual challenge in the question, usually the site engineers a link so I have not looked at the challenge.

abdulkadir yıldız
abdulkadir yıldız
2,711 Points
abdulkadir yıldız
abdulkadir yıldız
2,711 Points 
TILES = ('-', ' ', '-', ' ', '-', '||',
         '_', '|', '_', '|', '_', '|', '||',
         '&', ' ', '_', ' ', '||',
         ' ', ' ', ' ', '^', ' ', '||'
)
for tile in TILES:
    if tile != "||":
        print(tile, end="")
    else:
        print()
Andrew Hopkins
Andrew Hopkins
8,957 Points

This is correct, however the Treehouse instructions are misleading: "In that case, instead of printing the item, print a new line (\n)." Referencing the \n suggests to the student that they are to use this in the code.

George Kim
PLUS
George Kim
Courses Plus Student 1,689 Points
George Kim
George Kim
Courses Plus Student 1,689 Points

Thank you james. Now I know how end = works!

Kortney Field
Kortney Field
14,091 Points
Kortney Field
Kortney Field
14,091 Points

what does *** end="" *** do in your code? Does this read "end of line"?

Kortney Field
Kortney Field
14,091 Points
Kortney Field
Kortney Field
14,091 Points

for tile in TILES: if tile != "||": print(tile, end="") else: print()

Why does *** print(tile, end="") *** need to be in a (x,y) format to work?)

Thanks

Daniel Kaczmarczyk
PLUS
Daniel Kaczmarczyk
Courses Plus Student 5,536 Points
Daniel Kaczmarczyk
Daniel Kaczmarczyk
Courses Plus Student 5,536 Points

Thanks James! Indeed you are right, that was the right answer. Thanks for pointing this print() behaviour out. I completely forgot about it!

Tinotenda Muyengwa
Tinotenda Muyengwa
3,464 Points

thanks james that really worked ,,N/B default for end in print() is a new line.

for tile in TILES: if tile != "||": print(tile, end="") else: print()

Tinotenda Muyengwa
Tinotenda Muyengwa
3,464 Points
Tinotenda Muyengwa
Tinotenda Muyengwa
3,464 Points

for tile in TILES: if tile != "||": print(tile, end="") else: print()