python - 字典按月中的天数(键)在 python 中排序

Question

我正在尝试按月中的天数对字典进行排序。 (30,31 和 28)。我试图通过日历模块和日期时间模块来实现这一点，但没有得到所需的输出。任何建议!

product_sell= {'November':680,'August':678,'October':857,'January': 125,'April':989,'February': 300, 'September':120,'March':259,'December':899,'June':368, 'May':31,'July':968}

预期输出(按月数排序(键)一月、三月...=31、二月=28、四月、六月..=30)

product_sell= {'January': 125, 'March':259, 'May':31, 'July':968, 'August':678,  'October':857, 'December':899, 'April':989, 'June':368, 'September':120, 'November':680, 'February': 300}

Answer 1

你不能对字典进行排序，因为它是无序的。您可以使用 ordereddict 来实现这一点。

from collections import OrderedDict

product_sell= {'November':680,'August':678,'October':857,'January': 125,'April':989,'February': 300, 'September':120,'March':259,'December':899,'June':368, 'May':31,'July':968}
months = ['January','February','March','April','May','June','July','August','September','October','November','December']

OrderedDict(sorted(product_sell.items(),key =lambda x:months.index(x[0])))

输出:

OrderedDict([('January', 125),
         ('February', 300),
         ('March', 259),
         ('April', 989),
         ('May', 31),
         ('June', 368),
         ('July', 968),
         ('August', 678),
         ('September', 120),
         ('October', 857),
         ('November', 680),
         ('December', 899)])