Can someone tell me how to improve my following python code.

Code:

a = open('/home/Username/1st few programms/names.txt')
for y in a:
 c = y.split(",")
 c.sort()
dict = {'"':0, "A": 1, "B": 2,"C": 3,"D": 4, "E": 5,"F": 6,"G": 7,"H": 8,"I": 9,"J": 10,"K": 11,"L": 12,"M": 13,"N": 14,"O": 15,"P": 16,"Q": 17,"R": 18, "S": 19, "T": 20, "U": 21, "V": 22,"W": 23,"X": 24, "Y": 25, "Z": 26}
sum = 0
for x in range(len(c)):
 localsum = 0
 for y in c[x]:
 localsum += dict[y]
 sum += localsum*(x+1)
print sum

Problem statement is:

Using names.txt, a 46K text file containing over five-thousand first names, begin by sorting it into alphabetical order. Then working out the alphabetical value for each name, multiply this value by its alphabetical position in the list to obtain a name score.

For example, when the list is sorted into alphabetical order, COLIN, which is worth 3 +たす 15 +たす 12 +たす 9 +たす 14 =わ 53, is the 938th name in the list. So, COLIN would obtain a score of 938 ×ばつかける 53 =わ 49714.

What is the total of all the name scores in the file?

Can someone tell me how to improve my following python code.

Code:

a = open('/home/Username/1st few programms/names.txt')
for y in a:
 c = y.split(",")
 c.sort()
dict = {'"':0, "A": 1, "B": 2,"C": 3,"D": 4, "E": 5,"F": 6,"G": 7,"H": 8,"I": 9,"J": 10,"K": 11,"L": 12,"M": 13,"N": 14,"O": 15,"P": 16,"Q": 17,"R": 18, "S": 19, "T": 20, "U": 21, "V": 22,"W": 23,"X": 24, "Y": 25, "Z": 26}
sum = 0
for x in range(len(c)):
 localsum = 0
 for y in c[x]:
 localsum += dict[y]
 sum += localsum*(x+1)
print sum

Problem statement:

Using names.txt, a 46K text file containing over five-thousand first names, begin by sorting it into alphabetical order. Then working out the alphabetical value for each name, multiply this value by its alphabetical position in the list to obtain a name score.

For example, when the list is sorted into alphabetical order, COLIN, which is worth 3 +たす 15 +たす 12 +たす 9 +たす 14 =わ 53, is the 938th name in the list. So, COLIN would obtain a score of 938 ×ばつかける 53 =わ 49714.

What is the total of all the name scores in the file?