Count method for 2 or more elements in a string

Question

Can I check more then 1 element in a list by using the count method?

Answer 1

list has a count() method.

lst = [1,2,3,4,5,4,6,7,3,2,4,4,5,4]
print(lst.count(4)
# output: 5

here is also a sample with a list containing trings:

lst2 = ['abcdef','tfdcsefxs','nbbcdc','xzabef','ef']

cnt = 0
for i in lst2:
if i.count('ef') > 0:
cnt += 1
print(cnt)

# or:
print(len([i for i in lst2 if i.count('ef')]))

Answer 2

David, you can run a modified version of :

print('ef: ',txt.count('ef'))

Instead of having 'ef' or 'gh' or whatever fixed in the code, you can put the 'strings to search' in a separate list. Then run the code line from above in a for loop and feed the search strings from the list. It's not too much to change. I wish you a great success!

Answer 3

here the answers to your last quetions:

# ----------
lst = [1,2,3,4,5,4,6,7,3,2,4,4,5,4]
print(lst.count(4)+lst.count(5)) # if you are counting both together
print('4:',lst.count(4),', 5:',lst.count(5)) # if you count them separate

# ----------
txt = 'abcdef tfdcsefxs nbbcdc xzabef ef'
print('ef: ',txt.count('ef')) # string also has a count() method

Answer 4

I like this elegant and pythonic solution by Lothar :

print(len([i for i in lst2 if i.count('ef')]))

Answer 5

Yes, that can do it. I want to search for 7 elements, and it makes it inefficient running it again and again.
Thank you.

Answer 6

With len() you get the number of elements in a list

Answer 7

I'd like to count specific elements, not all the string.

Answer 8

How? Couldn't get it to work on more than one element.

Answer 9

You could call count separately and add the results

Answer 10

For 10 or more elements it isn't efficient enough. Thanks.

Answer 11

by filter them out maybe ?

[character for character in thestring if character == thecharyourelookingfor]

then you can find the size of the result.

pretty sure its not the most optimal way

Answer 12

With lists there is counter (). I'm looking for a method with strings.
In addition, in your sample, how can I count 4 and 5?

Answer 13

What would I do if I want to count not only 'ef' but also 'gh'? Together. Total sum.