Indexing the list in python

Question

record=['MAT', '90', '62', 'ENG', '92','88']

course='MAT'

suppose i want to get the marks for MAT or ENG what do i do? I just know how to find the index of the course which is new[4:10].index(course). Idk how to get the marks.

elethan · Accepted Answer · 2016-10-01T03:22:59.773

1

Try this:

i = record.index('MAT')
grades = record[i+1:i+3]

In this case i is the index/position of the 'MAT' or whichever course, and grades are the items in a slice comprising the two slots after the course name.

You could also put it in a function:

def get_grades(course):
    i = record.index(course)
    return record[i+1:i+3]

Then you can just pass in the course name and get back the grades.

>>> get_grades('ENG')
['92', '88']
>>> get_grades('MAT')
['90', '62']
>>>

Edit

If you want to get a string of the two grades together instead of a list with the individual values you can modify the function as follows:

def get_grades(course):
    i = record.index(course)
    return ' '.join("'{}'".format(g) for g in record[i+1:i+3])

edited Oct 01 '16 at 03:22

answered Oct 01 '16 at 03:06

elethan

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elethan is there a way i can make my final answer are '90' '92' – Bob Oct 01 '16 at 03:18
@Bob it can output `"'90' '92'"` if you wan't, or `'90 92'` but `'90' '92'` on it's own (as two strings) will not work. It will be concatinated to `'9092'`. – elethan Oct 01 '16 at 03:20
how would i do that" '90' '92'" – Bob Oct 01 '16 at 03:22
@Bob OK, try the function under **Edit** – elethan Oct 01 '16 at 03:26

score 0 · Answer 2 · edited May 23 '17 at 12:33

0

You can use index function ( see this https://stackoverflow.com/a/176921/) and later get next indexes, but I think you should use a dictionary.

edited May 23 '17 at 12:33

Community

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answered Oct 01 '16 at 03:13

Dante

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Indexing the list in python

2 Answers2

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