Np5 formatted output (III)

'''
Niu Niu 、 Niu Mei and Niu cola are both Nowcoder Users of , One day Nowcoder Because of some kind of wrong operation, the administrators of have added some extra white space characters to the left and right sides of their user names （ Such as space or '\t' etc. ）,
Now give them one of the three names name, Please export name The original content after removing the blank characters on both sides .
'''
'''
Knowledge point ：
.strip() --- Remove the spaces on both sides
.lstrip() --- Delete the left space
.rstrip() --- Delete the space on the right
.replace(" ","") --- Delete all spaces
.split() --- First segmentation ,"".join() --- And then splicing
'''
s1 = '   fdfdfds    ohoi    '
print(s1.strip(), s1.lstrip(), s1.rstrip(), s1.replace(' ',''),sep='\n')

# split() How to use the function
# 1. With no arguments
# split() If there are no parameters in , Function defaults to space ,tab Space character , Carriage return, etc. are used as segmentation conditions
String_0 = "www.com aaa bbb QJ6252630247.jpg"
String_1 = "www.com\taaa\tbbb\tQJ6252630247.jpg" 
String_2 = "www.com\naaa\nbbb\nQJ6252630247.jpg"

a = String_0.split()
b = String_1.split()
c = String_2.split()

print(a)
print(b)
print(c)

# 2. With parameters
# split("/") When there are parameters in , Parameters will be used as segmentation conditions , Split the string , Each segment obtained is returned as an element of the list
String_0 = "www.com/aaa/bbb/QJ6252630247.jpg"
String_1 = "www.com-aaa-bbb-QJ6252630247.jpg"
String_2 = "www.com:aaa:bbb:QJ6252630247.jpg"

a = String_0.split("/")
b = String_1.split("-")
c = String_2.split(":")

print(a)
print(b)
print(c)

# 3. belt 2 Parameters
# The second parameter indicates how many times to split
String_0 = "www:com:aaa:bbb:QJ6252630247.jpg"

a = String_0.split(":", 1)
b = String_0.split(":", 2)
c = String_0.split(":", 3)
d = String_0.split(":", 4)

print(a)
print(b)
print(c)
print(d)

# 4. Get the last parameter
String_0 = "www.com/aaa/bbb/QJ6252630247.jpg"

a = String_0.split("/")[-1]

print(a)

# join() How to use the function
'''
Python There is join() and os.path.join() Two functions , The specific functions are as follows ：
    join()：     Connection string array . The string 、 Tuples 、 Elements in the list with the specified characters ( Separator ) The connection generates a new string
    os.path.join()：   Combine multiple paths and return
'''

'''
1、join() function

grammar ：  'sep'.join(seq)

Parameter description
sep： Separator . Can be null
seq： The sequence of elements to connect 、 character string 、 Tuples 、 Dictionaries
The above grammar is ： With sep As a separator , take seq All the elements are combined into a new string

Return value ： Returns a separator sep String generated after connecting elements

2、os.path.join() function

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

Return value ： Combine multiple paths and return

notes ： Parameters before the first absolute path will be ignored
'''

seq1 = ['hello' , 'good', 'boy' ]
print('-'.join(seq1))

import os
filepath = os.path.join('/hello/', 'good/boy/', 'doiido')
print(filepath)