I have a string and I want to replace the every time after its second occurrence only.
s = "change the string in the sentence and the save"
I would like the replace the word the to hello. But except the first one.
Output should be:
change the string in hello sentence and hello save
I would split the string from right with the word you're going to replace use str.rsplit() function, but only split s.count('the') - 1 times.
Then, join the output list with hello:
>>> s.rsplit('the', s.count('the') - 1)
['change the string in ', ' sentence and ', ' save']
>>> 'hello'.join(s.rsplit('the', s.count('the') - 1))
'change the string in hello sentence and hello save'
Try this:
def replace_not_first(str, word, replace):
str_arr = str.split(word)
return str_arr[0] + word + replace.join(str_arr[1:])
str = "change the string in the sentence and the save"
print(replace_not_first(str, 'the', 'hello'))
prints: change the string in hello sentence and hello save
Try the following one liner solution.
string = 'change the string in the sentence and the save'
new_string = string[:string.find('the')+3] + string[string.find('the')+3:].replace('the', 'hello')
I hope this will do the job.
str = str.partition('the')[0] + str.partition('the')[1] + str.partition('the')[-1].replace('the','hello')
str.partition('the') needs to go through the whole text and your code is wastefully doing it three times.
first, the, rest = str.partition('the'); str = first + the + rest.replace('the', 'hello')>>> str = "change the string in the sentence and the save"
>>> str.replace('the', 'hello')
>>> str.replace('hello', 'the',1)
This should work
string = "change the string in the sentence and the save"
the_arr = string.split("the")
print the_arr[0] + "the" + "hello".join(the_arr[1:])`
**hello** is already in the string and is located before the first the. Such as: **hello** change the string in the sentence and the saveTry this:
>>> s = "change the string in the sentence and the save"
>>> s.split("the",1)[0]+"the" + s.split("the",1)[1].replace("the","hello")
'change the string in hello sentence and hello save'
You can split the string into parts:
string = "change the string in the sentence and the save"
splitString = string.split()
firstIndex = splitString.index('the')
part1 = ' '.join(splitString[:firstIndex+1])
part2 = ' '.join(splitString[firstIndex+1:]).replace('the','hello')
newString = part1 + ' ' + part2
Or in one line:
newString = ' '.join(['hello' if j == 'the' and i != string.split().index('the') else j for i, j in enumerate(string.split())])
