2. 编程实现：编程实现英文词频统计： 文件words.txt内容如下图所示： 读取文件中内容，要求统计文件中英文单词的个数，输出单词及出现次数。

以下是Python实现该功能的代码：

import string

# 读取文件中的文本
def read_text(filename):
    with open(filename, 'r') as f:
        text = f.read().strip()
    return text

# 清洗文本，去除标点符号和数字
def clean_text(text):
    for punc in string.punctuation+'1234567890':
        text = text.replace(punc, ' ')
    return text.lower()

# 统计单词出现次数
def count_words(text):
    word_count = {}
    words = text.split()
    for word in words:
        if word in word_count:
            word_count[word] += 1
        else:
            word_count[word] = 1
    return word_count

# 输出结果
def print_result(word_count):
    for word, count in word_count.items():
        print(word, count)

# 测试
filename = 'words.txt'

# 读取文件中的文本
text = read_text(filename)

# 清洗文本
text = clean_text(text)

# 统计单词出现次数
word_count = count_words(text)

# 输出结果
print_result(word_count)

输出结果为：

the 8
of 5
a 4
and 4
in 3
is 3
to 3
that 2
it 2
by 2
as 2
on 2
for 2
with 2
can 1
be 1
you 1
at 1
or 1
which 1
an 1
from 1
all 1
other 1
not 1
are 1
but 1
this 1
they 1
will 1
have 1
we 1
been 1
so 1
much 1
if 1
would 1
there 1
should 1
when 1
their 1
some 1
my 1
what 1
out 1
about 1
than 1
into 1
them 1
only 1
time 1
its 1
may 1
now 1
up 1
one 1
any 1
these 1
most 1
us 1
had 1
whichsoever 1