if 语句中的“无法分配给函数调用”错误

Question

我正在尝试制作一个程序，该程序需要一个段落，然后显示字数、单词的平均长度以及每个单词出现的次数。然而，在尝试实现它发现每个单词出现多少次的部分时，发生了错误：“无法分配给函数调用”我已经查看了其他问题，但我无法适应它。错误发生在“word_amount(wordposition) += 1”这一行。

passage = "this is a test to test this program"
words = passage.split()
wordcount = len(words)
print(passage)
print("Number of words:",wordcount)
wordlength = list(map(len, words))
avwordlength = (sum(wordlength))/wordcount
print("Average word length:",avwordlength)
checked_words = []
word_amount = []
for x in range(wordcount):
        currentword = words(x)
        if currentword in checked_words:
                wordposition = checked_words.index(currentword)
                word_amount(wordposition) += 1
        else:
                checked_words.append(currentword)
                word_amount.append(1)
print(checked_words)
print(word_amount)

Answer 1

圆括号用于函数，这就是错误告诉您它试图将单词数量解释为函数的原因。您需要使用方括号，对于上面列出的三行单词也是如此