How to delete element from the list that a keyword in between the element in python

Question

I have a list that contains elements and want to delete some elements that has particular keyword.

For example:

List contains: list = ['red rose','blue rose','red color','yellow paper']

And I'm looking for deleting lists with keyword 'RED' and get output as

Output: ['blue rose', 'yellow paper']

Thank you.

score 0 · Answer 1 · answered May 11 '18 at 04:37

There are primarily two ways of doing this:

Using list comprehension:

lst = ['red rose', 'blue rose', 'red color', 'yellow paper']

output = [i for i in lst if 'red' not in i.lower()]

Using a for loop:

lst = ['red rose', 'blue rose', 'red color', 'yellow paper']

output = []
for i in lst:
    if 'red' not in i.lower():
        output.append(i)

Hope that helps!

vishnupal Singh · Accepted Answer · 2019-12-06T08:42:46.137

0

list = ['red rose','blue rose','red color','yellow paper']
keyword = 'RED'
for i in list[:]:
    if i.find(keyword.lower()) != -1:
        list.remove(i)
print(list)

edited Dec 06 '19 at 08:42

answered May 11 '18 at 04:57

vishnupal Singh

194
4

1) Do not use the name of [built-in functions](https://docs.python.org/3/library/functions.html) as a variable name. Just try `print(list("ABCD"))` at the end of your code to see, what I mean. 2) Do not delete list elements while iterating over it. Try your script with `['red rose','blue rose','red color', 'red ridignhood', 'yellow paper']` to illustrate the problem. 3) Please consider adding a description, when posting an answer. I suggest reading [How do I write a good answer?](https://stackoverflow.com/help/how-to-answer) – Mr. T May 11 '18 at 06:17

Minions · Answer 3 · 2018-05-11T04:52:02.043

-1

All what you need is a loop:

s =  ['red rose','blue rose','red color','yellow paper']
s = [x for x in s if not str(x).lower().__contains__('red')]
print(s)

['blue rose', 'yellow paper']

edited May 11 '18 at 04:52

answered May 11 '18 at 04:37

Minions

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Thank you. This is cool. But, do you have any other alternate logic? – Sai Kiran May 11 '18 at 04:43
Do you want to solve your issue or you need a new logic ?! – Minions May 11 '18 at 04:53
I need logic sir. – Sai Kiran May 11 '18 at 18:24

score -1 · Answer 4 · answered May 11 '18 at 04:37

-1

>>> foo = ['red rose','blue rose','red color','yellow paper']

>>> [x for x in foo if 'red' not in x]
['blue rose', 'yellow paper']

This of course assumes lower case letters. And note it doesn't delete entries, but rather creates a new list object.

answered May 11 '18 at 04:37

BoltzmannBrain

5,082
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Why the downvote?? – BoltzmannBrain May 11 '18 at 14:28
Hey, I dint do this in intention. I clicked up arrow but it still says -1. Sorry – Sai Kiran May 11 '18 at 18:24

How to delete element from the list that a keyword in between the element in python

4 Answers4