How to sum specific values from two different txt files in python - python-3.x

Question

I have 2 txt files with names and scores. For example:
File 1 File 2 Desired Output
Name Score Name Score Name Score
Michael 20 Michael 30 Michael 50
Adrian 40 Adrian 50 Adrian 90
Jane 60 Jane 60
I want to sum scores with same names and print them. I tried to pair names and scores in two different dictionaries and after that merge the dictionaries. However, I can't keep same names with different scores. So, I'm stuck here. I've written something like following :
d1=dict()
d2=dict()
with open('data1.txt', "r") as f:
test = [i for line in f for i in line.split()]
i = 0
while i < len(test) - 1:
d1[test[i]] = test[i + 1]
i += 2
del d1['Name']
with open('data2.txt', "r") as f:
test = [i for line in f for i in line.split()]
i = 0
while i < len(test) - 1:
d2[test[i]] = test[i + 1]
i += 2
del d2['Name']
z = dict(d2.items() | d1.items())

Answer 1

Using a dictionary comprehension should get you what you are after. I have assumed the contents of the files are:
File1.txt:
Name Score
Michael 20
Adrian 40
Jane 60
File2.txt:
Name Score
Michael 30
Adrian 50
Then you can get a total as:
with open("file1.txt", "r") as file_in:
next(file_in) # skip header
file1_data = dict(row.split() for row in file_in if row)
with open("file2.txt", "r") as file_in:
next(file_in) # skip header
file2_data = dict(row.split() for row in file_in if row)
result = {
key: int(file1_data.get(key, 0)) + int(file2_data.get(key, 0))
for key
in set(file1_data).union(file2_data) # could also use file1_data.keys()
}
print(result)
This should give you a result like:
{'Michael': 50, 'Jane': 60, 'Adrian': 90}

Answer 2

Use defaultdict
from collections import defaultdict
name_scores = defaultdict(int)
files = ('data1.txt', 'data2.txt')
for file in files:
with open(file, 'r') as f:
for name, score in f.split():
name_scores[name] += int(score)
edit: You'll probably have to skip any header line and maybe clean up trailing white spaces, but the gist of it is above.