counting elements in list of strings python

Question

How to get number of elements in list of lists?

L = ['a,b,c,d','e,f,g,h,i','j,k,l',]

I want to find how many elements in the first list in L.

a,b,c,d = 4 elements
e,f,g,h,i = 5 elements
j,k,l = 3 elements

That's not a list of lists, that's a list of strings. A list of lists would be [[a,b,c,d],[e,f,g,h,i],[j,k,l]] and would have a different answer (which would be len(L[0])). — Greg Hewgill
– Greg Hewgill, Commented Jul 19, 2015 at 23:45

unutbu · Accepted Answer · 2015-07-19 23:44:49Z

1

For each string in L you could use the str.count method to count the number of commas and add one:

In [277]: L = ['a,b,c,d','e,f,g,h,i','j,k,l',]

In [278]: [item.count(',')+1 for item in L]
Out[278]: [4, 5, 3]

answered Jul 19, 2015 at 23:44

unutbu

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