How to create a dictionary python [closed]

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How would I approach this problem, I am to create a dictionary, where the name of the individual is a key and the values are a tuple made of list of marks(out of 10) and a list of Grade.

So, I have in a text file:

Josh

8  A
8  A
6  C
7  B
9  A

Pablo

output of that should be {Josh:([8,8,6,7,9],['A','A','C','B','A']), Pablo:([7,9,8,9,9],['A','B','A','B','B'])}

This is what i have so far:

def course_grading(student_file):

f = open('student.txt','r')

for line in f:
   new_line = line.strip('\n').split()

Any ideas?

Possible duplicate of stackoverflow.com/questions/8424942/… — user3282276
– user3282276, Commented Nov 25, 2014 at 19:42
What did you try to implement this? Which programming problems have you met during the implementation? — Eugene Naydenov
– Eugene Naydenov, Commented Nov 25, 2014 at 19:42
I tried to split it at the white space using .split('/t') but i dont know how to create a tuple of two list with first list of marks and second of grades — Alex Rayo
– Alex Rayo, Commented Nov 25, 2014 at 19:44

ChesterL · Accepted Answer · 2014-11-25 19:56:19Z

0

According your question and your comment, I assume you have no problem with the text and input. So the point is how to split up mark and grade?

You can use zip() to do this

# This is an example for Josh, assuming you already have list call lines,
# lines = [(mark1, grad1), (mark2, grade2)......]
marks, grades = zip(*lines) # marks is a tuple of marks, grades is a tuple of grades.

There you go

By the way, the split() function will automatically strip '\n'

answered Nov 25, 2014 at 19:56

ChesterL

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2 Comments

Alex Rayo Over a year ago

I have a question though, In a text file, how would I go about distinguishing a line with the students name from a line with students marks and grades?

ChesterL Over a year ago

@AlexRayo If you are expecting 'Josh' or 'Pablo', just add an if statement, otherwise, you could use 'if ord(line[0]) > 57 or ord(line[0]) < 48` it returns true if the first character is not a digit. ord() is a built-in function to see ASCII code of a character

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