Python3 urllib.parse common functions summary of urlencode quote quote_plus unquote unquote_plus and so on

This article illustrates the urllib.parse common functions of Python3 by example. I will share it with you for your reference as follows:

1. Get url parameter

>>> from urllib import parse
>>> url = r'https://docs.python.org/3.5/search.html?q=parse&check_keywords=yes&area=default'
>>> parseResult = parse.urlparse(url)
>>> parseResult
ParseResult(scheme='https', netloc='docs.python.org', path='/3.5/search.html', params='', query='q=parse&check_keywords=yes&area=default', fragment='')
>>> param_dict = parse.parse_qs(parseResult.query)
>>> param_dict
{'q': ['parse'], 'check_keywords': ['yes'], 'area': ['default']}
>>> q = param_dict['q'][0]
>>> q
'parse'
# Note: the plus sign will be decoded and may not always be what we want 
>>> parse.parse_qs('proxy=183.222.102.178:8080&task=XXXXX|5-3+2')
{'proxy': ['183.222.102.178:8080'], 'task': ['XXXXX|5-3 2']}

2, urlencode

>>> from urllib import parse
>>> query = {
  'name': 'walker',
  'age': 99,
  }
>>> parse.urlencode(query)
'name=walker&age=99'

3, quote/quote_plus

>>> from urllib import parse
>>> parse.quote('a&b/c')  # Uncoded slash 
'a%26b/c'
>>> parse.quote_plus('a&b/c')  # I've coded the slash 
'a%26b%2Fc'

4, unquote/unquote_plus

from urllib import parse
>>> parse.unquote('1+2')  # The plus sign is not decoded 
'1+2'
>>> parse.unquote('1+2')  # Decode the plus sign into a space 
'1 2'

If you still want to ask why there is no urldecode - see example 1 again 5 times. ^_^

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I hope this article has been helpful to you in Python programming.