如果单词在字典中，我如何计算每行中的单词出现次数

def count_words(text):
    word_count = {}
    lines = text.split('\n')
    for line in lines:
        words = line.split(' ')
        for word in words:
            if word in word_count:
                word_count[word] += 1
            else:
                word_count[word] = 1
    return word_count

text = '''
This is a sample text.
It contains multiple lines.
Each line has some words.
'''

result = count_words(text)
for word, count in result.items():
    print(f'{word}: {count}')

This: 1
is: 1
a: 1
sample: 1
text.: 1
It: 1
contains: 1
multiple: 1
lines.: 1
Each: 1
line: 1
has: 1
some: 1
words.: 1