[Python] using techniques join () method of a sequence of elements together into a string

In Python join()method may be elements of a sequence to the specified character string to generate a new connection. The sequence may be a string, a tuple, list or dictionary

join () method Syntax: 'str'.join(sequence)wherein STR : separators, can be empty; Sequence : a sequence of elements to be connected

The string operations:

>>> sequence = 'I Love Python'
>>> print('.'.join(sequence))
I. .L.o.v.e. .P.y.t.h.o.n

Tuple operation:

>>> sequence = ('I', 'Love', 'Python')
>>> print(''.join(sequence))
ILovePython

>>> sequence = ('I', 'Love', 'Python')
>>> print('-'.join(sequence))
I-Love-Python

Operating the list:

>>> sequence = ['I', 'Love', 'Python']
>>> print(''.join(sequence))
ILovePython

>>> sequence = ['I', 'Love', 'Python']
>>> print('+'.join(sequence))
I+Love+Python

Dictionary of operation (only dictionary key connection):

>>> sequence = {'a':1, 'b':2, 'c':3, 'd':4}
>>> print(''.join(sequence))
abcd

>>> sequence = {'a':1, 'b':2, 'c':3, 'd':4}
>>> print('_'.join(sequence))
a_b_c_d

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In Python there is a os.path.join()method that belongs to the os.pathmodule, the effect of the method of splicing one or more paths, it is necessary to note the following:

• If the first letter of each component name is not included \, the function will automatically add
• If the last component is null, then the generated path to a \separator end
• If a component is an absolute path, all components before it will be discarded

Case 1: the first letter of each component name is not included \

>>> import os
>>>
>>> Path1 = 'home'
>>> Path2 = 'language'
>>> Path3 = 'python'
>>> 
>>> Path = os.path.join(Path1, Path2, Path3)
>>> print('Path =', Path)
Path = home\language\python

Case 2: The final component is empty

>>> import os
>>> 
>>> Path1 = 'home'
>>> Path2 = 'language'
>>> Path3 = ''
>>> 
>>> Path = os.path.join(Path1, Path2, Path3)
>>> print('Path =', Path)
Path = home\language\

Case three: one component is an absolute path

>>> import os
>>> 
>>> Path1 = 'home'
>>> Path2 = '\language'
>>> Path3 = 'python'

>>> Path = os.path.join(Path1, Path2, Path3)
>>> print('Path =', Path)
>>> Path = \language\python