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+--- Thread: Trying to get unique words from a set of strings (/thread-25909.html)
Trying to get unique words from a set of strings - garam0 - Apr-15-2020
when I execute the following code I get ['red', 'pink', 'red', 'white', 'blue']. I cannot understand why there are 2 'red' words. Can someone help me with this?
string ='red,red,white,white,pink,blue,red,white,blue'
wordlist = string.split(',')
for word in wordlist:
if wordlist.count(word) > 1:
wordlist.remove(word)
print(wordlist)
thank you
(Apr-15-2020, 02:46 PM)garam0 Wrote: when I execute the following code I get ['red', 'pink', 'red', 'white', 'blue']. I cannot understand why there are 2 'red' words. Can someone help me with this?
string ='red,red,white,white,pink,blue,red,white,blue'
wordlist = string.split(',')
for word in wordlist:
if wordlist.count(word) > 1:
wordlist.remove(word)
print(wordlist)
thank you
[python]string ='red,red,white,white,pink,blue,white,white,blue,blue,white'
wordlist = string.split(',')
print(wordlist)
i = 0
for word in wordlist:
if wordlist.count(word) > 1:
wordlist.remove(word)
print(wordlist)[/python]
RE: Trying to get unique words from a set of strings - bowlofred - Apr-15-2020
You are attempting to iterate through the list and delete elements from it at the same time. This confuses the iterator. You could iterate over a copy of the list, or delete them through other methods.
string ='red,red,white,white,pink,blue,white,white,blue,blue,white'
wordlist = string.split(',')
print(wordlist)
i = 0
for word in list(wordlist): # list() makes a new list object
if wordlist.count(word) > 1:
wordlist.remove(word)
print(wordlist)
RE: Trying to get unique words from a set of strings - deanhystad - Apr-15-2020
You should never remove items from the thing you are iterating. Instead build a new list that has the desired characteristics.
string ='red,red,white,white,pink,blue,white,white,blue,blue,white'
wordlist = string.split(',')
print(wordlist)
# Make a list only containing unique words
uniquewords = [word for word in wordlist if wordlist.count(word) == 1]
print('Unique colors', uniquewords)
# Make a list where each word only occurs once
colors = set(wordlist)
print('Colors', colors)
RE: Trying to get unique words from a set of strings - menator01 - Apr-15-2020
Solution I came up with:
string ='red,red,white,white,pink,blue,white,white,blue,blue,white'
wordlist = string.split(',')
# print(wordlist)
for word in wordlist:
while wordlist.count(word) > 1:
wordlist.remove(word)
print(f'{wordlist}')Output:['red', 'pink', 'blue', 'white']RE: Trying to get unique words from a set of strings - ndc85430 - Apr-15-2020
Do you actually care about the order? If not, just use a set instead of a list.
RE: Trying to get unique words from a set of strings - garam0 - Apr-15-2020
thank you all for your help!