I want to delete a particular list within list in python

Question

I have list items as below. Want to delete particular list within this list. When user enter phone number, it check with list and get particular list which have matched phone number list and then delete that particular list and display rest of list.

account= [['abc', 8566665891, 's', 5000], ['xyz', 9852560352, 'c', 6000], ['pqr', 6854265891, 's', 7000]]

c_phone = int(input("Enter your phone to Close Account : "))
    for a, b, c, d in account:
        if c_phone == b:
           del account[b]
           print(account)

the result will be:

Enter your phone to Close Account : 9852560352

[['abc', 8566665891, 's', 5000], ['pqr', 6854265891, 's', 7000]]

Answer 1

Rebuilding the list with filter is probably better, but here is an answer with actual deletion of element:

account= [['abc', 8566665891, 's', 5000], ['xyz', 9852560352, 'c', 6000], ['pqr', 6854265891, 's', 7000]]

c_phone = int(input("Enter your phone to Close Account : "))
for a, b, c, d in account:
    if c_phone == b:
       account.remove([a,b,c,d])
       print(account)

Answer 2

You can filter your list with a listcomp:

account= [['abc', 8566665891, 's', 5000], ['xyz', 9852560352, 'c', 6000], ['pqr', 6854265891, 's', 7000]]

number = 8566665891
account = [i for i in account if i[1] != number]
# [['xyz', 9852560352, 'c', 6000], ['pqr', 6854265891, 's', 7000]]

Alternatively you can use the function filter():

list(filter(lambda x: x[1] != number, account))

You can also use a dict of lists instead of a list of lists. Removing of items in a dict is faster than in a list.

account = {j: [i, k, l] for i, j, k, l in account}
account.pop(number) # del account[number]

print(account)
{9852560352: ['xyz', 'c', 6000], 6854265891: ['pqr', 's', 7000]}

Answer 3

You can use enumerate while iterating over your list and then use del account[i] to delete the element with index i from your list.

account= [['abc', 8566665891, 's', 5000], ['xyz', 9852560352, 'c', 6000], ['pqr', 6854265891, 's', 7000]]

# c_phone = int(input("Enter your phone to Close Account : "))
c_phone = 8566665891
for i, (a, b, c, d) in enumerate(account):
    if c_phone == b:
        del account[i]
        print(account)

Answer 4

Try this :

account= [['abc', 8566665891, 's', 5000], ['xyz', 9852560352, 'c', 6000], ['pqr', 6854265891, 's', 7000]]
c_phone = int(input("Enter your phone to Close Account : "))
print( [k for k in account if k[1] != c_phone] )

Answer 5

You can enumerate on list so that it will index in idx and element in i you can check if item exists in list like if 8566665891 in i and delete the item by index

account= [['abc', 8566665891, 's', 5000], ['xyz', 9852560352, 'c', 6000], ['pqr', 6854265891, 's', 7000]]
c_phone = int(input("Enter your phone to Close Account : "))
for idx,i in enumerate(account):
     if c_phone in i:
          del account[idx]

print(account)