Python urlencode & OrderedDict

将一个mapping对象或两个元素元组的序列（序列可能包含str或bytes对象）转换为百分比编码的ASCII文本字符串。如果结果字符串要用作通过urlopen（）函数进行POST操作的数据，则应将其编码为字节，否则将导致TypeError。
Convert a mapping object or a sequence of two-element tuples, which may contain str or bytes objects, to a percent-encoded ASCII text string. If the resultant string is to be used as a data for POST operation with the urlopen() function, then it should be encoded to bytes, otherwise it would result in a TypeError.

一、简单使用场景

from urllib.parse import urlencode
data = {
    "name": "Allan","job": "Test development","token": "1234567890"
}
print(urlencode(data))

结果：name=Allan&job=Test+development&token=1234567890

二、复杂使用场景

先用OrderdDict对字典的key排序，然后再使用。

from urllib.parse import urlencode
data = {
    "name": "Allan","job": "Test development","token": "1234567890"
}
print(urlencode(OrderedDict(sorted(data.items(), key=lambda t: t[0]))))

结果：job=Test+development&name=Allan&token=1234567890

三、小结

urlencode结合OrderedDict实现复杂实现，针对key或者value排序。