Python converts a list to a dictionary data structure.

Python converts a list to a dictionary data structure.

This example describes how to convert a list in Python to a dictionary data structure. We will share this with you for your reference. The details are as follows:

''' [{'Sympost': 101, 'sort ': 1, 'name': 'aaa'}, {'sympost': 102, 'sort': 2, 'name': 'bbbb'}, {'sympost': 103, 'Port': 3, 'name': 'cccc'}, {'sympost': 104, 'sort ': 4, 'name': 'ddddd'}, {'symbol': 105, 'sort ': 5, 'name': 'eee '}, {'sympost': 106, 'sort ': 6, 'name': 'ffffff'}, {'sympost': 107, 'sort': 7, 'name ': 'gggggg'}, {'symbol': 108, 'sort ': 8, 'name': 'hhhh'}, {'symbol': 109, 'sport': 9, 'name': 'iii'}] is converted to the following structure to obtain the record value {101: {'sort ': 1, 'symbol': 101, 'name': 'aaa'}, 102: {'sort ': 2, 'symbol': 102, 'name': 'bbbb'}, 103: {'sort ': 3, 'symbol': 103, 'name': 'cccccc'}, 104: {'sort ': 4, 'symbol': 104, 'name ': 'dddddd'}, 105: {'sort ': 5, 'symbol': 105, 'name': 'eee'}, 106: {'sort': 6, 'symbol': 106, 'name': 'ffffff'}, 107: {'sort ': 7, 'symbol': 107, 'name': 'gggggg '}, 108: {'sort ': 8, 'symbol': 108, 'name': 'hhhh'}, 109: {'sort': 9, 'symbol': 109, 'name': 'iii'} ''' students = [{'sympost': 101, 'sort ': 1, 'name': 'aaa '}, {'symbol': 102, 'sport': 2, 'name': 'bbbbb'}, {'symbol': 103, 'sort ': 3, 'name ': 'cccccc'}, {'symbol': 104, 'sort ': 4, 'name': 'ddddd'}, {'symbol': 105, 'sport': 5, 'name': 'eeeee'}, {'sympost': 106, 'Port': 6, 'name': 'ffff'}, {'sympost': 107, 'sort ': 7, 'name': 'gggggg'}, {'symbol': 108, 'sort': 8, 'name': 'hhhh '}, {'symbol': 109, 'sort ': 9, 'name': 'iii'}] symbol_list = map (lambda x: (x. get ('symbol'), x), students) print symbol_listprint '----------------------------------------- 'print dict (symbol_list) # value_list = map (lambda x: x, students) ### print dict (zip (symbol_list, value_list) ### student = {#101: {'symbol': 101, 'sort ': 1, 'name ': 'aaa' }#}## student = [# {101: {'symbol': 101, 'sort ': 1, 'name': 'aaa' }}#] #

Sorting usage:

students = [      {'name':'zhangsan', 'price':20.01, 'date':'2015-01-09T01:00:00Z'},      {'name':'lisi', 'price':10.01, 'date':'2013-01-09T01:00:00Z'},      {'name':'wangwu', 'price':0.01, 'date':'2012-01-09T01:00:00Z'}] print sorted(students, key=lambda s:s["name"])print sorted(students, key=lambda s:s["price"], reverse=True)print sorted(students, key=lambda s:s["date"], reverse=True)aa = sorted(students, key=lambda s:s["price"], reverse=True)sorted(aa, key=lambda s:s["date"], reverse=True)symbol_arr = [<Symbol: Symbol object>, <Symbol: Symbol object>, <Symbol: Symbol object>] sorted(symbol_arr, key=lambda s:s.amount, reverse=True)

I hope this article will help you with Python programming.

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