CODEWITHSUNDEEP
python
Cman88
Cman88

Reputation: 9

I'm not sure what a certain code line does

I was trying to have a program using Python to create a "pyramid" based on a number, n, out of o's and came up with this: ( I would print nn, that would be the lines.)

import time

n = 0
while True:
    n += 2 #just another way to show n=n+2
    nn = n, "o" #nn would be an amount of o's, based on what #n was
    time.sleep(1)
    print (nn, str.center(40, " "))

Not sure how to make nn the o's and not sure what line 6 does either. Does anyone know the answer to either question? ( I'm not in a class just programming for fun.)

Upvotes: 0

Views: 122

Answers (4)

Ma0
Ma0

Reputation: 15204

You can also use the built-in formatting options offered by python. Take a look at this:

def pyramid_builder(height, symbol='o', padding=' '):
    for n in range(0, height, 2):  # wonkiness-correction by @mhawke
        print('{0:{1}^{2}}'.format(symbol*n, padding, height * 2))

pyramid_builder(20, 'o')

The ^ symbol says that you want your print centered. Before it ({1}) comes the padding symbol and after it ({2}) the total width.

This is fully customisable and fun to play with.

Upvotes: 1

Jeril
Jeril

Reputation: 8521

This will be the answer to your question

import time

n = 0
while True:
    n += 2
    nn = n * "o"
    time.sleep(1)
    print (nn.center(40, " "))
    if n > 30:
        break

The reason why they have put time.sleep(1) is to make it look like an animation. print (nn, str.center(40, " ")) this must be changed to nn.center(40, " ") as .center is a method of string.

Upvotes: 1

kb1000
kb1000

Reputation: 320

You can try this:

from __future__ import print_function
import time

for n in range(0, 40, 2):
    nn = n * "o" #nn would be an amount of o's, based on what #n was
    time.sleep(1)
    print(nn.center(40, " "))

Upvotes: 1

scotty3785
scotty3785

Reputation: 7006

import time

n = 0
while True:
    n += 2 #just another way to show n=n+2
    nn = "o" * n #nn would be an amount of o's, based on what #n was
    time.sleep(1)
    print (nn.center(40," "))

As someone has mentioned in the comments "o" * n will give a a string containing n "o"s. I've fixed the print line to use the correct method a calling the center method.

Upvotes: 1

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