CODEWITHSUNDEEP
pythonpython-3.x
Killer
Killer

Reputation: 188

Random shuffle each 2 letters in a word

Its possible to shuffle a word each two characters in a randomic way? Like hello world changed to ehllo owlrd or hello wolrd or ehll owolrd.

I cant get something like the following results: olleh dlrow and lleho wodlr

Upvotes: 0

Views: 457

Answers (2)

Brad Solomon
Brad Solomon

Reputation: 40938

Code

Break up the pairs of twos, sample, and recombine:

from random import sample

s = 'hello world'
twos = [s[i:i+2] for i in range(0, len(s), 2)] # Step 1
twos = ''.join([''.join(sample(two, len(two))) for two in twos]) # Step 2

print(twos)
ehll oowrld

Walkthrough

Step 1 uses list comprehension, basically a condensed for-loop. Specifying range(0, len(s), 2) iterates over an object with a step size of 2. The best way to easily visualize is to set i equal to its progressive values: s[0:0+2] will give you 'he', and so on. The result of Step 1 is ['he', 'll', 'o ', 'wo', 'rl', 'd'].

The inner part of Step 2 also uses list comprehension to iterate over each of the pairs established in Step 1. for two in twos says to perform the action for each element in the list twos established in the previous step. You could replace each instance of two with any word that you like, such as pair (just don't use a keyword). Then using ''.join() concatenates the broken-up strings back together.

Note: this treats spaces as characters to involve in the shuffling.

Upvotes: 3

juanpa.arrivillaga
juanpa.arrivillaga

Reputation: 96324

Yes, put your string in some mutable data structure, like a list. Then a straightforward algorithm would be to iterate by two, starting at the second item, and randomly swap:

>>> def shuffle_by_two(word):
...     wordl = list(word)
...     for i in range(1, len(word), 2):
...         if random.randint(0, 1):
...             wordl[i-1], wordl[i] = wordl[i], wordl[i-1]
...     return ''.join(wordl)
...

So, for example:

>>> shuffle_by_two("hello world")
'hello wolrd'
>>> shuffle_by_two("hello world")
'hello wolrd'
>>> shuffle_by_two("hello world")
'ehllo owrld'
>>> shuffle_by_two("hello world")
'ehllo world'
>>> shuffle_by_two("hello world")
'hello owlrd'
>>> shuffle_by_two("hello world")
'ehll oowrld'
>>>

Upvotes: 4

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