Sort values in array by keys in another dictionary (python) [duplicate]

Question

Let's suppose I have an array that looks like this:

x=['Other', 'Physical Training', 'Math', 'English', 'Physics', 'Literature']

I need to sort it (not alphabetically) by keys in dictionary:

 y={'Math':0,
    'Physics':1,
    'Chemistry':2,
    'Biology':3,
    'English':4,
    'Literature':5,
    'History':6,
    'Physical Training':7,
    'Other':8}

Based on y, I need to sort x, so that the end result looks like this:

x_sorted=['Math', 'Physics', 'English', 'Literature', 'Physical Training', 'Other']

How do I reach this?

Ehsan · Accepted Answer · 2022-07-02 04:34:09Z

2

if x is a list, to sort inplace:

x.sort(key=y.get)
#['Math', 'Physics', 'English', 'Literature', 'Physical Training', 'Other']

to sort without changing x itself:

x_sorted = sorted(x, key=y.get)

if x is an array, convert to list first:

x = list(x)

if not applicable, please provide more context in the use of arrays over lists so we can help better.

answered Jul 2, 2022 at 4:34

Ehsan

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