How do i remove multiple words from a string in python?

bannedWord = ["Good", "Bad", "Ugly"]
    
def RemoveBannedWords[toPrint, database]:
    statement = toPrint
    for x in range[0, len[database]]:
        if bannedWord[x] in statement:
            statement = statement.replace[bannedWord[x] + " ", ""]
    return statement
        
toPrint = "Hello Ugly Guy, Good To See You."
    
print[RemoveBannedWords[toPrint, bannedWord]]

The output is Hello Guy, To See You. Knowing Python I feel like there is a better way to implement changing several words in a string. I searched up some similar solutions using dictionaries but it didn't seem to fit this situation.

Paul P

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asked Jul 7, 2015 at 15:56

I use

bannedWord = ['Good','Bad','Ugly']
toPrint = 'Hello Ugly Guy, Good To See You.'
print[' '.join[i for i in toPrint.split[] if i not in bannedWord]]

answered Jul 7, 2015 at 16:01

ShreevardhanShreevardhan

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0

Here's a solution with regex:

import re
    
def RemoveBannedWords[toPrint,database]:
    statement = toPrint
    pattern = re.compile["\\b[Good|Bad|Ugly]\\W", re.I]
    return pattern.sub["", toPrint]
    
toPrint = "Hello Ugly Guy, Good To See You."
    
print[RemoveBannedWords[toPrint,bannedWord]]

Paul P

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answered Jul 7, 2015 at 16:03

Ajay GuptaAjay Gupta

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Slight variation on Ajay's code, when one of the string is a substring of other in the bannedWord list

bannedWord = ['good', 'bad', 'good guy' 'ugly']

The result of toPrint ='good winter good guy' would be

RemoveBannedWords[toPrint,database = bannedWord] = 'winter good'

as it will remove good first. A sorting is required wrt length of elements in the list.

import re

def RemoveBannedWords[toPrint,database]:
    statement = toPrint
    database_1 = sorted[list[database], key=len]
    pattern = re.compile[r"\b[" + "|".join[database_1] + "]\\W", re.I]
    return pattern.sub["", toPrint + ' '][:-1] #added because it skipped last word

toPrint = 'good winter good guy.'

print[RemoveBannedWords[toPrint,bannedWord]]

answered Oct 4, 2017 at 14:06

ItachiItachi

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Yet another variation on a theme. If you are going to be calling this a lot, then it is best to compile the regex once to improve the speed:

import re

bannedWord = ['Good', 'Bad', 'Ugly']
re_banned_words = re.compile[r"\b[" + "|".join[bannedWord] + "]\\W", re.I]

def RemoveBannedWords[toPrint]:
    global re_banned_words
    return re_banned_words.sub["", toPrint]

toPrint = 'Hello Ugly Guy, Good To See You.'
print[RemoveBannedWords[toPrint]]

answered Jul 7, 2015 at 16:18

Martin EvansMartin Evans

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1

As you're checking for the word boundary in the beginning and a non word character at the end, regex is preferable. Still in-memory array/list can also be used

bannedWord = ['Good', 'Bad', 'Ugly']

toPrint = 'Hello Uglyyy Guy, Good To See You.'

for word in bannedWord:
    toPrint = toPrint.replace[word, ""]

print[toPrint] 

Hello yy Guy,  To See You.

[Program finished] 

answered Feb 25, 2021 at 6:47

SubhamSubham

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