CODEWITHSUNDEEP
pythonstring
Cube
Cube

Reputation: 31

How to remove a whitespace from a string

What I want my code to do is that eventually the "-" will collide with the "0". But right now all it does is keep chasing the "0" and never touch it. 

import time
global gunshot, gun
gun = 0
gunshot = "-           0"

while True:
    global gunshot
    gunshot = " " + gunshot
    gunshot.replace(' 0', '0')
    print ('\r {0}'.format(gunshot)),
    if gunshot.find("-0") == 1:
        gunshot = "-"
    time.sleep(.1)

That is want I want:

     -     0
      -    0
       -   0

This is what it is doing

     -     0
     -     0
     -     0

Upvotes: 1

Views: 82

Answers (3)

Aaron Hampton
Aaron Hampton

Reputation: 894

You could also use a deque and just rotate the values:

from collections import deque


def gunshot_path(distance):
    return deque(['-'] + ([''] * (distance - 1)))


def print_gunshot_path(distance, target="0"):
    path = gunshot_path(distance)
    for i in range(distance):
        print(" ".join(path) + target)
        path.rotate()


print_gunshot_path(5)
print_gunshot_path(10, target='X')

Which prints:

-    0
 -   0
  -  0
   - 0
    -0
-         X
 -        X
  -       X
   -      X
    -     X
     -    X
      -   X
       -  X
        - X
         -X

Upvotes: 0

George John
George John

Reputation: 118

replace returns a new string, it does not change the variable inplace.

gunshot = gunshot.replace(' 0', '0')

This will fix your immediate problem, but you should consider using @MSeiferts code because it is much better.

Upvotes: 1

MSeifert
MSeifert

Reputation: 152587

You could use the str.format and str.rjust function here:

bullet = '-'
target = 'O'

distance = 3
field = 10

while distance >= 0:
    print('{}{}{}'.format(bullet, ' '*distance, target).rjust(field))
    distance -= 1

which prints:

     -   O
      -  O
       - O
        -O

Upvotes: 1

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