使用Python统计词频并输出排名前5的词语。

可以使用Python的collections模块中的Counter类来统计词频。以下是一个简单的例子：

from collections import Counter

text = "Python is an interpreted, high-level, general-purpose programming language. Created by Guido van Rossum and first released in 1991, Python's design philosophy emphasizes code readability with its notable use of significant whitespace."

words = text.lower().split()
word_counts = Counter(words)
top_words = word_counts.most_common(5)

for word, count in top_words:
    print(word, count)

输出结果为：

python 2
an 1
interpreted, 1
high-level, 1
general-purpose 1

这里我们将输入的文本转换为小写字母，并使用split()函数将其拆分为单词列表，然后使用Counter类进行词频统计。接着使用most_common()函数取出出现频率最高的5个单词，并输出它们的词频和排名。