python 列表、字典、元组、字符串之间的转换

$ python
Python 3.5.2 (default, Nov 23 2017, 16:37:01)
[GCC 5.4.0 20160609] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> dict = {'name':'eric', 'age':18, 'job':'writer'}
>>> #dict --- str
... print (type(str(dict))), str(dict)
<class 'str'>
(None, "{'age': 18, 'job': 'writer', 'name': 'eric'}")
>>> #dict --- tuple
... print (tuple(dict))
('age', 'job', 'name')
>>> #dict --- list
... print (list(dict))
['age', 'job', 'name']
>>>

$ python
Python 3.5.2 (default, Nov 23 2017, 16:37:01)
[GCC 5.4.0 20160609] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> lis = ['hey', 'are' ,'you' ,'ok']
>>> #list --- str
... print (str(lis))
['hey', 'are', 'you', 'ok']
>>> #list --- tuple
... print (tuple(lis))
('hey', 'are', 'you', 'ok')
>>>

$ python
Python 3.5.2 (default, Nov 23 2017, 16:37:01)
[GCC 5.4.0 20160609] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> str = '123qwe'
>>> #str --- tuple
... print (tuple(str))
('1', '2', '3', 'q', 'w', 'e')
>>> #str --- list
... print (list(str))
['1', '2', '3', 'q', 'w', 'e']
>>> #str 到dic转换 需要满足一定格式：
>>> print (type(eval("{'name':'eric', 'age':18}"))),(eval("{'name':'eric', 'age':18}"))
<class 'dict'>
(None, {'name': 'eric', 'age': 18})
>>>

$ python
Python 3.5.2 (default, Nov 23 2017, 16:37:01)
[GCC 5.4.0 20160609] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> tup = (1, 2, 3, 'a', 's', 'd')
>>> #tuple --- string just all the tuple's elements are string type
>>> print (' '.join(tup))
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
TypeError: sequence item 0: expected str instance, int found
>>> tup = ('1', '2', '3', 'a', 's', 'd')
>>> print (' '.join(tup))
1 2 3 a s d
>>> print (''.join(tup))
123asd
>>> #tuple --- list
>>> tup = (1, 2, 3, 'a', 's', 'd')
>>> print (list(tup))
[1, 2, 3, 'a', 's', 'd']
>>> #不可转换成字典

#!/usr/bin/python3

# -*- coding: utf-8 -*-

"""

# Author: EricRay

# Created Time : 2017-11-29 10:35:31

# File Name: censor.py

# Description:将文本的特殊字符用'*' 代替

"""
def censor(text, word):
num = 0
text_y = ''
text_t = text.split(' ')
for i in range(len(text_t)):
if text_t[i] == word:
text_t[i] = '*'
num += 1
if num == len(text_t):
return ''
else :
return ' '.join(list(text_t))

text = (input('Please input text:'))
word = (input('Please input word:'))

print (censor(text, word))

#结果展示

$ python censor.py
Please input text:you are so smart you you
Please input word:you
* are so smart * *