How To Count Numbers In A List Via Certain Rules?

Just to say I have a str and a list of strs and I want to count how many strs in the list that is contained in a str. Is there an elegant way to do that? For example, l = {'foo',

Solution 1:

sum(s in my_string for s in l)

Solution 2:

Here is a simple example,

l = ["foo", "bar", "what"]
st = "foobar"

count = 0
for _string in l:
    if _string in st:
        count += 1

print(count)

Solution 3:

Use count:

l = {"foo", "bar", "what"}
str = "foobar"c = [item in str for item in l].count(True)

In my opinion this is the most readable version. item in str means check if item is a substring of str. for item in l means that it should iterate through each list item in l (btw convention is not to use lowercase L for a variable name, as it looks nearly identical to the numeral 1 in many fonts). Finally .count(True) returns the number of times True exists in the list.

Solution 4:

Yet another solution

count = sum(item in str for item in l)