Combine two lists into a dictionary, join () function

  
  
>>> list
[ 'name', 'sex', 'tall']
>>> list1
[ 'liyue', 'boy', '190cm']
>>> dict(zip(list,list1))
{ 'name': 'liyue', 'sex': 'boy', 'tall': '190cm'}

  
  

Function: string.join ()

There are two functions join () and os.path.join () in Python, the specific functions are as follows:
    join (): connect string array. A string, a tuple, in the list element to specify character (separator) connected to generate a new string
    os.path.join (): returns the combination of a plurality of paths after
a function description
1, join () function
syntax: 'sep'.join (seq)
parameters
sep: delimiter. Can be empty
seq: sequence element to be connected, a string, a tuple, Dictionary
above syntax namely: sep as a separator, the combined seq all the elements into a new string
Return Value: returns to a separator sep after connecting each generated string elements
2, os.path.join () function
syntax: os.path.join (path1 [, path2 [ , ......]])
return value: a plurality of paths after the composition returns
Note: prior to the first parameter will be ignored absolute path
II example
# operation sequence (respectively using 'and': 'as a separator)
 
>>> SEQ1 = [' Hello ',' Good ',' boy ',' doiido ']
>>> print' '.


hello: good: boy: doiido #Operation
 
 
on the string
 
>>> seq2 = "hello good boy doiido"
>>> print ':'. join (seq2)
h: e: l: l: o:: g: o : o: d:: b: o: y:: d: o: i: i: d: o #operating
 
 
on tuples
 
>>> seq3 = ('hello', 'good', 'boy', 'doiido ')
>>> print': '. join (seq3)
hello: good: boy: doiido #operate
 
 
on the dictionary
 
>>> seq4 = {' hello ': 1,' good ': 2,' boy ': 3, 'doiido': 4}
>>> print ':'. join (seq4)
boy: good: doiido: hello
 
 

os.path.join()函数：连接两个或更多的路径名组件

1.如果各组件名首字母不包含’/’，则函数会自动加上

2.如果有一个组件是一个绝对路径，则在它之前的所有组件均会被舍弃

3.如果最后一个组件为空，则生成的路径以一个’/’分隔符结尾

Demo1
import os

Path1 = 'home'
Path2 = 'develop'
Path3 = 'code'

Path10 = Path1 + Path2 + Path3
Path20 = os.path.join(Path1,Path2,Path3)
print ('Path10 = ',Path10)
print ('Path20 = ',Path20)

输出

 

Path10 = homedevelopcode
Path20 = home\develop\code

 

--------------------------------------------------------------

 

Demo2
 

import os

Path1 = '/home'
Path2 = 'develop'
Path3 = 'code'

Path10 = Path1 + Path2 + Path3
Path20 = os.path.join(Path1,Path2,Path3)
print ('Path10 = ',Path10)
print ('Path20 = ',Path20) 
输出

Path10 = /homedevelopcode
Path20 = /home\develop\code

--------------------------------------------------------------

Demo3
import os

Path1 = 'home'
Path2 = '/develop'
Path3 = 'code'

Path10 = Path1 + Path2 + Path3
Path20 = os.path.join(Path1,Path2,Path3)
print ('Path10 = ',Path10)
print ('Path20 = ',Path20) 

输出

Path10 = home/developcode
Path20 = /develop\code

--------------------------------------------------------------

Demo4
import os

Path1 = 'home'
Path2 = 'develop'
Path3 = '/code'

Path10 = Path1 + Path2 + Path3
Path20 = os.path.join(Path1,Path2,Path3)
print ('Path10 = ',Path10)
print ('Path20 = ',Path20 )

输出

Path10 = homedevelop/code
Path20 = /code