组合数据类型练习，英文词频统计实例上

1.字典实例：建立学生学号成绩字典，做增删改查遍历操作。

>>> d={}
#增
>>> d['201508030055']='100'
>>> print(d)
{'201508030055': '100'}
#判断
>>> 201508030044 in d
False
#增
>>> d['201508030054']='50'
>>> d['201508030053']='80'
>>> print(d)
{'201508030055': '100', '201508030054': '50', '201508030053': '80'}
#删
>>> d.pop('201508030054')
'50'
>>> d
{'201508030055': '100', '201508030053': '80'}
#改
>>> d['201508030055']='90'
>>> d
{'201508030055': '90', '201508030053': '80'}
#查
>>> d.get('201508030053')
'80'
>>> print(d.get('201508030053'))
80
>>> print(d.get('2015080300555'))
None

 

2.列表，元组，字典，集合的遍历。

#列表遍历
s1=list('211211344')
for i in s1:
    print(i)
>>> 
 RESTART: C:/Users/Administrator/AppData/Local/Programs/Python/Python36/h.py 
2
1
1
2
1
1
3
4
4

#元组遍历
s2=tuple('211211344')
s2
for i in s2:
    print(i)
>>> 
 RESTART: C:/Users/Administrator/AppData/Local/Programs/Python/Python36/h.py 
2
1
1
2
1
1
3
4
4
2
1
1
2
1
1
3
4
4

#字典遍历
s3={}
s3['aaa']='100'
s3['bbb']='80'
s3['ccc']='100'
s3['ddd']='100'
for i in s3:
    print(i,s3[i])
>>> 
RESTART: C:/Users/Administrator/AppData/Local/Programs/Python/Python36/h.py 
aaa 100
bbb 80
ccc 100
ddd 100

#集合遍历
s4=set('11233322')
s4
for i in s4:
    print(i)
>>> 
 RESTART: C:/Users/Administrator/AppData/Local/Programs/Python/Python36/h.py 
    
3
1
2

总结列表，元组，字典，集合的联系与区别。

（1）列表是任意对象的序列，列表用方括号表示。
如：['2', '1', '3', '4', '3', '2', '1']
（2）元组是将一组值打包到一个对象中，用圆括号表示。可以随时插入，删除；而元组一旦确认就不能够再更改。元组在定义过程中，字符串必须用单引号‘扩起来。
如：('2', '1', '3', '4', '3', '2', '1')

（3）字典就是一个关联数组，由键和值组成，其中包含通过键的对象。用大括号表示。与集合相比，比集合访问方便。
如：{'a': '100', 'b': '10'}
（4）与列表和元组不同，集合是无序的，也不能通过索引进行访问。而且集合中的元素不能重复。
如：{'2', '3', '1'}

 

3.英文词频统计实例

待分析字符串分解提取单词

大小写 txt.lower()

分隔符'.,:;?!-_’

单词列表

 

s='''It's been a long day without you my friend
And I'll tell you all about it when I see you again

We've come a long way from where we began
Oh I'll tell you all about it when I see you again
When I see you again

Damn who knew all the planes we flew
Good things we've been through
That I'll be standing right here
Talking to you about another path
I know we loved to hit the road and laugh
But something told me that it wouldn't last
Had to switch up look at things different see the bigger picture
Those were the days hard work forever pays
Now I see you in a better place

How could we not talk about family when family's all that we got?
Everything I went through you were standing there by my side
And now you gonna be with me for the last ride
It's been a long day without you my friend

And I'll tell you all about it when I see you again

We've come a long way from where we began
Oh I'll tell you all about it when I see you again

When I see you again

First you both go out your way
And the vibe is feeling strong and what's
Small turn to a friendship a friendship
Turn into a bond and that bond will never
Be broke and the love will never get lost

And when brotherhood come first then the line
Will never be crossed established it on our own
When that line had to be drawn and that line is what
We reach so remember me when I'm gone

How could we not talk about family when family's all that we got?
Everything I went through you were standing there by my side
And now you gonna be with me for the last ride
Let the light guide your way hold every memory
As you go and every road you take will always lead you home

Hoo

It's been a long day without you my friend

And I'll tell you all about it when I see you again

We've come a long way from where we began
Oh I'll tell you all about it when I see you again
When I see you again
Again

When I see you again see you again

When I see you again'''

#将单词变成小写
s=s.lower()
#替换分隔符
for i in ',.?':
s=s.replace(i,'')
#逐个分隔单词

words=s.split(" ")
word=set(words)
print(words)

>>> 
== RESTART: C:/Users/lenovo/AppData/Local/Programs/Python/Python36-32/aa.py ==
["it's", 'been', 'a', 'long', 'day', 'without', 'you', 'my', 'friend\n\nand', "i'll", 'tell', 'you', 'all', 'about', 'it', 'when', 'i', 'see', 'you', "again\n\nwe've", 'come', 'a', 'long', 'way', 'from', 'where', 'we', 'began\noh', "i'll", 'tell', 'you', 'all', 'about', 'it', 'when', 'i', 'see', 'you', 'again\nwhen', 'i', 'see', 'you', 'again\n\ndamn', 'who', 'knew', 'all', 'the', 'planes', 'we', 'flew\ngood', 'things', "we've", 'been', 'through\nthat', "i'll", 'be', 'standing', 'right', 'here\ntalking', 'to', 'you', 'about', 'another', 'path\ni', 'know', 'we', 'loved', 'to', 'hit', 'the', 'road', 'and', 'laugh\nbut', 'something', 'told', 'me', 'that', 'it', "wouldn't", 'last\nhad', 'to', 'switch', 'up', 'look', 'at', 'things', 'different', 'see', 'the', 'bigger', 'picture\nthose', 'were', 'the', 'days', 'hard', 'work', 'forever', 'pays\nnow', 'i', 'see', 'you', 'in', 'a', 'better', 'place\n\nhow', 'could', 'we', 'not', 'talk', 'about', 'family', 'when', "family's", 'all', 'that', 'we', 'got\neverything', 'i', 'went', 'through', 'you', 'were', 'standing', 'there', 'by', 'my', 'side\nand', 'now', 'you', 'gonna', 'be', 'with', 'me', 'for', 'the', 'last', "ride\nit's", 'been', 'a', 'long', 'day', 'without', 'you', 'my', 'friend\n\nand', "i'll", 'tell', 'you', 'all', 'about', 'it', 'when', 'i', 'see', 'you', "again\n\nwe've", 'come', 'a', 'long', 'way', 'from', 'where', 'we', 'began\noh', "i'll", 'tell', 'you', 'all', 'about', 'it', 'when', 'i', 'see', 'you', 'again\n\nwhen', 'i', 'see', 'you', 'again\n\nfirst', 'you', 'both', 'go', 'out', 'your', 'way\nand', 'the', 'vibe', 'is', 'feeling', 'strong', 'and', "what's\nsmall", 'turn', 'to', 'a', 'friendship', 'a', 'friendship\nturn', 'into', 'a', 'bond', 'and', 'that', 'bond', 'will', 'never\nbe', 'broke', 'and', 'the', 'love', 'will', 'never', 'get', 'lost\n\nand', 'when', 'brotherhood', 'come', 'first', 'then', 'the', 'line\nwill', 'never', 'be', 'crossed', 'established', 'it', 'on', 'our', 'own\nwhen', 'that', 'line', 'had', 'to', 'be', 'drawn', 'and', 'that', 'line', 'is', 'what\nwe', 'reach', 'so', 'remember', 'me', 'when', "i'm", 'gone\n\nhow', 'could', 'we', 'not', 'talk', 'about', 'family', 'when', "family's", 'all', 'that', 'we', 'got\neverything', 'i', 'went', 'through', 'you', 'were', 'standing', 'there', 'by', 'my', 'side\nand', 'now', 'you', 'gonna', 'be', 'with', 'me', 'for', 'the', 'last', 'ride\nlet', 'the', 'light', 'guide', 'your', 'way', 'hold', 'every', 'memory\nas', 'you', 'go', 'and', 'every', 'road', 'you', 'take', 'will', 'always', 'lead', 'you', "home\n\nhoo\n\nit's", 'been', 'a', 'long', 'day', 'without', 'you', 'my', 'friend\n\nand', "i'll", 'tell', 'you', 'all', 'about', 'it', 'when', 'i', 'see', 'you', "again\n\nwe've", 'come', 'a', 'long', 'way', 'from', 'where', 'we', 'began\noh', "i'll", 'tell', 'you', 'all', 'about', 'it', 'when', 'i', 'see', 'you', 'again\nwhen', 'i', 'see', 'you', 'again\nagain\n\nwhen', 'i', 'see', 'you', 'again', 'see', 'you', 'again\n\nwhen', 'i', 'see', 'you', 'again']

 

单词计数字典

#创建词的字典
dic={}
for i in word:
    dic[i]= words.count(i)
#输出以词频作为数组的列表
words=list(dic.items())
words.sort(key=lambda x:x[1],reverse=True)
print(words,'\n')
#遍历词频前十的数组
for i in range(10):
    word,count=words[i]
    print("{} {}".format(word,count))

[('you', 31), ('see', 14), ('i', 14), ('the', 10), ('when', 10), ('a', 10), ('all', 9), ('we', 9), ('about', 9), ('it', 8), ("i'll", 7), ('tell', 6), ('that', 6), ('and', 6), ('long', 6), ('be', 5), ('to', 5), ('my', 5), ('way', 4), ('come', 4), ('me', 4), ('been', 4), ('from', 3), ('without', 3), ('where', 3), ('were', 3), ('will', 3), ("again\n\nwe've", 3), ('day', 3), ('began\noh', 3), ('standing', 3), ('friend\n\nand', 3), ('there', 2), ('go', 2), ('gonna', 2), ('never', 2), ('could', 2), ('with', 2), ('again\nwhen', 2), ('road', 2), ('again\n\nwhen', 2), ('by', 2), ('talk', 2), ('went', 2), ('things', 2), ('family', 2), ('every', 2), ('not', 2), ('your', 2), ('bond', 2), ("family's", 2), ('line', 2), ('got\neverything', 2), ('last', 2), ('for', 2), ('side\nand', 2), ('again', 2), ('through', 2), ('is', 2), ('now', 2), ('loved', 1), ('on', 1), ('picture\nthose', 1), ('turn', 1), ('something', 1), ('bigger', 1), ('right', 1), ('broke', 1), ('knew', 1), ('friendship', 1), ('know', 1), ('lead', 1), ('remember', 1), ('better', 1), ('told', 1), ('never\nbe', 1), ('again\n\ndamn', 1), ('what\nwe', 1), ('work', 1), ('place\n\nhow', 1), ('always', 1), ('pays\nnow', 1), ('ride\nlet', 1), ('drawn', 1), ('planes', 1), ('flew\ngood', 1), ('first', 1), ("home\n\nhoo\n\nit's", 1), ('into', 1), ('in', 1), ('here\ntalking', 1), ('gone\n\nhow', 1), ('established', 1), ('last\nhad', 1), ('own\nwhen', 1), ('another', 1), ('way\nand', 1), ('so', 1), ('strong', 1), ('again\nagain\n\nwhen', 1), ('who', 1), ('at', 1), ('line\nwill', 1), ("it's", 1), ("ride\nit's", 1), ('path\ni', 1), ('switch', 1), ('friendship\nturn', 1), ('through\nthat', 1), ('again\n\nfirst', 1), ('lost\n\nand', 1), ('both', 1), ('feeling', 1), ('different', 1), ('light', 1), ("what's\nsmall", 1), ('love', 1), ('guide', 1), ('up', 1), ('memory\nas', 1), ('out', 1), ('vibe', 1), ('our', 1), ('forever', 1), ('then', 1), ('laugh\nbut', 1), ("i'm", 1), ('get', 1), ('hit', 1), ('take', 1), ('hold', 1), ('days', 1), ('had', 1), ('hard', 1), ('crossed', 1), ("we've", 1), ('brotherhood', 1), ('reach', 1), ('look', 1), ("wouldn't", 1)] 

you 31
see 14
i 14
the 10
when 10
a 10
all 9
we 9
about 9
it 8