计算列表中字符串中的字符，Python

Question

I am having difficulty with one of my homework questions.

Basically, I am to create a function using a for loop to count the characters used in strings which are inside of a list. I am able to get the length of the strings with len(), but I can only get one of the strings and I can't seem to get it in list form.

My Code:

def method1(input1):

    total = 0

    a = []

    for word in input1:

        total = len(word)

        a = [total]

    return a

This returns [3] with the input ['seven', 'one']

Any help would be appreciated. I am very new to Python.

Answer 1

Well here is one way of doing it. You have list "a" with different strings inside of them. You can simply iterate through the list counting the len gth of each string.

def method1(input1):

    l = list(input1)
    total = sum(len(i) for i in l)
    return int(total)

print(method1(["hello", "bye"]))

What you are doing here is receiving an input and converting it to a list. Then for each value inside of the list, you are calculating it's length. The sum adds up those lengths and finally, you return total .