供以后参考(例如:For python3)

>>> import urllib.request as req
>>> query = 'eventName=theEvent&eventDescription=testDesc'
>>> req.pathname2url(query)
>>> 'eventName%3DtheEvent%26eventDescription%3DtestDesc'

如果你不想使用urllib。

https://github.com/wayne931121/Python_URL_Decode

#保留字元的百分號編碼
URL_RFC_3986 = {
"!": "%21", "#": "%23", "$": "%24", "&": "%26", "'": "%27", "(": "%28", ")": "%29", "*": "%2A", "+": "%2B", 
",": "%2C", "/": "%2F", ":": "%3A", ";": "%3B", "=": "%3D", "?": "%3F", "@": "%40", "[": "%5B", "]": "%5D",
}

def url_encoder(b):
    # https://zh.wikipedia.org/wiki/%E7%99%BE%E5%88%86%E5%8F%B7%E7%BC%96%E7%A0%81
    if type(b)==bytes:
        b = b.decode(encoding="utf-8") #byte can't insert many utf8 charaters
    result = bytearray() #bytearray: rw, bytes: read-only
    for i in b:
        if i in URL_RFC_3986:
            for j in URL_RFC_3986[i]:
                result.append(ord(j))
            continue
        i = bytes(i, encoding="utf-8")
        if len(i)==1:
            result.append(ord(i))
        else:
            for c in i:
                c = hex(c)[2:].upper()
                result.append(ord("%"))
                result.append(ord(c[0:1]))
                result.append(ord(c[1:2]))
    result = result.decode(encoding="ascii")
    return result

#print(url_encoder("我好棒==%%0.0:)")) ==> '%E6%88%91%E5%A5%BD%E6%A3%92%3D%3D%%0.0%3A%29'

Python 2

你要找的是urllib.quote_plus:

safe_string = urllib.quote_plus('string_of_characters_like_these:$#@=?%^Q^$')

#Value: 'string_of_characters_like_these%3A%24%23%40%3D%3F%25%5EQ%5E%24'

Python 3

在Python 3中，urllib包被分解成更小的组件。您将使用urllib.parse。Quote_plus(注意解析子模块)

import urllib.parse
safe_string = urllib.parse.quote_plus(...)

注意urllib。Urlencode并不总是能做到这一点。问题在于，有些服务关心参数的顺序，而在创建字典时，这些顺序就会丢失。对于这种情况，使用urllib。正如Ricky建议的那样，quote_plus更好。

尝试请求而不是urllib，你不需要打扰urlencode!

import requests
requests.get('http://youraddress.com', params=evt.fields)

编辑:

如果你需要有序的名称-值对或多个名称值，那么设置参数如下:

params=[('name1','value11'), ('name1','value12'), ('name2','value21'), ...]

而不是用字典。

对于Python 3 urllib3正常工作，您可以根据其官方文档使用以下方法:

import urllib3

http = urllib3.PoolManager()
response = http.request(
     'GET',
     'https://api.prylabs.net/eth/v1alpha1/beacon/attestations',
     fields={  # here fields are the query params
          'epoch': 1234,
          'pageSize': pageSize 
      } 
 )
response = attestations.data.decode('UTF-8')