如何在字符串列表中查找字母序列？

Question

Let's say I have the list:

lst1 = ['abc', 'abcde', 'abab', 'acd']

I want to create a dictionary to count the # of times 'ab' is in the list, so in this example, the dictionary would be {'ab': 4} . What do I do?

Answer 1

You can use the following:

>>> {'ab': ','.join(l).count('ab')}
{'ab': 4}

Answer 2

You could use a generator expression within sum

>>> lst1 = ['abc', 'abcde', 'abab', 'acd']
>>> {'ab': sum(1 for i in lst1 if 'ab' in i)}
{'ab': 3}