removing sublist from nested list based on some condition

Question

I have a list and want to remove the third sublist, but I am not able to

import time

def mylist():
    active_clients.append([1,10])
    active_clients.append([1, 20])
    active_clients.append([1, 30])

    print " \n before deleting"
    for t in active_clients:

        print t[0], t[1]

        if (t[1] == 30):
            del t


    print "\n after deleting"
    for a in active_clients:

        print a[0], a[1]



if __name__ == '__main__':
    active_clients = []
    mylist()

How can I get output like

before deleting

1 10

1 20

1 30

after deleting

1 10

1 20

Possible duplicate of Remove items from a list while iterating — Patrick Artner
– Patrick Artner, Commented Dec 29, 2017 at 22:10

Patrick Artner · Accepted Answer · 2017-12-29 22:06:06Z

1

import time

def mylist():
    global active_clients
    active_clients.append([1,10])
    active_clients.append([1, 20])
    active_clients.append([1, 30])

    toRemove = [] # remember what to remove
    print " \n before deleting"
    for t in active_clients:

        print t[0], t[1]

        if (t[1] == 30):
            toRemove.append(t) # remember

    for t in toRemove: # remove em all
        active_clients.remove(t)

    print "\n after deleting"
    for a in active_clients:

        print a[0], a[1]



if __name__ == '__main__':
    active_clients = []
    mylist()

Or rebuild the list: active_clients = [x for x in active_clients if x[1] != 30]

edited Dec 29, 2017 at 22:06

answered Dec 29, 2017 at 22:03

Patrick Artner

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2 Comments

Amarjit Dhillon Over a year ago

wow, thanks a ton, it works like charm. Happy new year in Advance 🍺

Patrick Artner Over a year ago

@AmarjitSingh had to fix == to != in the rebuild the list. If no others answers help you out, check the mark next to my asnwer as answer please.

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