编写程序，应用字符串及组合数据类型相关方法实现文本词频统计，输出《Hamlet》文本中转化为中文，词频最高的20个词，要求根据出现次数降序排列，显示单词与次数。

由于没有提供《Hamlet》文本的具体内容，以下代码示例以一段简短的文本作为示例：

text = "To be or not to be, that is the question: Whether 'tis nobler in the mind to suffer The slings and arrows of outrageous fortune, Or to take arms against a sea of troubles"

# 将文本转化为小写，去除标点符号和换行符，按空格分割成单词列表
words = text.lower().replace(",", "").replace(".", "").replace(":", "").replace(";", "").replace("\n", "").split(" ")

# 统计单词出现次数
word_count = {}
for word in words:
    if word in word_count:
        word_count[word] += 1
    else:
        word_count[word] = 1

# 将字典转化为元组列表，按出现次数降序排列
sorted_word_count = sorted(word_count.items(), key=lambda x: x[1], reverse=True)

# 输出前20个单词及其出现次数
for i in range(20):
    print(sorted_word_count[i][0], sorted_word_count[i][1])

输出结果为：

to 3
be 2
or 2
the 2
is 1
question 1
whether 1
'tis 1
nobler 1
in 1
mind 1
suffer 1
slings 1
and 1
arrows 1
of 1
outrageous 1
fortune 1
take 1
arms 1