Is there a way to remove duplicate and continuous words/phrases in a string?

Question

Is there a way to remove duplicate and continuous words/phrases in a string? E.g.

[in]: foo foo bar bar foo bar

Answer 1

txt1 = 'this is a foo bar bar black sheep , have you any any wool woo , yes sir yes sir three bag woo wu wool'
txt2 =  'this is a sentence sentence sentence this is a sentence where phrases phrases duplicate where phrases duplicate'

def remove_duplicates(txt):
    result = []
    for word in txt.split():
        if word not in result:
            result.append(word)
    return ' '.join(result)

Ouput:

In [7]: remove_duplicate_words(txt1)                                                                                                                                  
Out[7]: 'this is a foo bar black sheep , have you any wool woo yes sir three bag wu'                                                                                  

In [8]: remove_duplicate_words(txt2)                                                                                                                                 
Out[8]: 'this is a sentence where phrases duplicate'