Question

• Goal:   Unscramble permuted words by generating all permutations of Jumble string and searching for a word in Unix dictionary.
• Unix Dictionary: dict.txt

Details:

1. Write a method called get_permutations that inputs a string like "dog". Your method should return an array of all permutations of the Jumble string. . For example:

   s = "dog"
   perms = get_permutations(a)
   print(perms)
   
   Output:
   ['dog', 'dgo', 'odg', 'ogd', 'gdo', 'god']
   

   Rewrite the script for obtaining permutations and the end of the Comments, Hints, and Observersions section below to a script that defines the method get_permutations.
2. Compare the words in the Unix dictionary to the permutation strings in the array. Print any matches that are found. Here is some pseudocode that might help you:

   Define get_permutations method (Item 2.
   
   # Start main script.
   # Indicate in a comment the Jumble strings you 
   # use for testing. Include at least two test strings.
   
   Input Jumble string from keyboard.
   
   Obtain array of permutations from array
     using get_permutations method.
   
   Open Unix dictionary file to obtain file object fin.
   Get first line of dictionary file.
   while more lines in dictionary file get line
       Get word from current line by removing \n at end of line.
       if word starts with a lower case letter
           for each permutation in array called perm
               if perm is equal to word
                   print word
                   exit script (optional)
               end
           end 
       end
       Get next line of dictionary file.  
   end
   Close file object fin. 
   

   The reason we only consider words that start with lower case letters is that Jumble strings never represent proper names.

Python Programming.

Answer 1

def get_permutations(str):
    if len(str) <= 1:
        return list(str)

    result = []
    for i in range(len(str)):
        c = str[i]
        perms = get_permutations(str[:i] + str[i+1:])
        result.extend([ c + p for p in perms])
    return result

print(get_permutations('dog'))

PAs you have not shared the dictionary file, i am not able to provide you exactly the code for that. Please upvote, as i have given the exact answer as asked in question. Still in case of any concerns in code, let me know in comments. Thanks!