Explain the use of the join of function in Python

Function: string join ()

Python has two functions, join() and os.path.join (), which are as follows:
      join() :       concatenates an array of strings. Concatenate a string, tuple, or element in a list with the specified character (delimiter) to generate a new string
      os.path.join () :   returns after combining multiple paths

1. Function description
1. join() function

Syntax:   'sep'.join(seq)

Parameters that
sep: separator. Can be null
seq: sequence of elements, string, tuple, dictionary to join
The syntax above is: combine all the elements of seq into a new string with sep as the separator

Return value: returns a string generated by connecting the elements with the delimiter sep

2, os.path.join () function

Syntax:   os.path.join (path1[,path2[,...]])

Return value: returns after combining multiple paths

Note: parameters before the first absolute path are ignored

2 instances

# Operates on sequences (used separately) ' ' with ':' As a separator) 

>>> seq1 = ['hello','good','boy','doiido']
>>> print ' '.join(seq1)
hello good boy doiido
>>> print ':'.join(seq1)
hello:good:boy:doiido


# Manipulate 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


# Operates 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


# Merge directory 

>>> import os
>>> os.path.join('/hello/','good/boy/','doiido')
'/hello/good/boy/doiido'