Delete sub-list from list in python

Question

I need to remove the sub lists from a list in Python.

For example: The main list A contains

A=[ 'a,b,c', 'd,e,f' , 'g,h,i' , 'g,l,m' , 's,l,k' , 'd,k,l', 'a,g,d' ]

I need to remove the sub lists from A which begin with the items in the following list:

B = ['g','d']

so that Final List A = [ 'a,b,c', 's,l,k' , 'a,g,d' ]

Thanks in advance

Does this answer your question? [Filtering a list of strings based on contents](https://stackoverflow.com/questions/2152898/filtering-a-list-of-strings-based-on-contents), [Checking whether a string starts with XXXX](https://stackoverflow.com/q/8802860/4518341) — wjandrea, Jun 17 '20 at 00:24
Even your output seems wrong. It should be `['a,b,c', 's,l,k', 'a,g,d']`. 2nd Element `'d,e,f'` should also be removed as start element `'d'` is in second list. — Astik Anand, Jun 17 '20 at 00:27
also [str.startswith with a list of strings to test for](https://stackoverflow.com/q/20461847/4518341) — wjandrea, Jun 17 '20 at 00:38

score 2 · Answer 1 · answered Jun 17 '20 at 00:20

2

Using list comprehension:

print([x for x in A if x[0] not in ['g', 'd']])

answered Jun 17 '20 at 00:20

DirtyBit

@CeliusStingher how does it not? – DirtyBit Jun 17 '20 at 00:33
1

Sorry, my bad. It does work I was having the wrong input. Changed to +1 – Celius Stingher Jun 17 '20 at 00:33

score 0 · Accepted Answer · answered Jun 17 '20 at 00:25

0

You can do it using list comprehension and split(",").

print([e for e in A if e.split(",")[0] not in B])

Output

['a,b,c', 's,l,k', 'a,g,d']

Your output above for your approach is wrong. 2nd Element 'd,e,f' should also be removed as start element 'd' is in second list.

answered Jun 17 '20 at 00:25

Astik Anand

2 Answers2