I am trying to add items to a list in a dictionary. I have two lists: x_list and y_list. I am trying to make x_list the keys and y_list the values. I have tried using a zip method but I really need to add them one by one. Right now I have:
dictionary = dict((x,0) for x in x_list)
but I would like to have something like:
dictionary = dict((x,y) for x in x_list, for y in y_list)
but obviously this is creating a syntax error. Is there any way to do this? Thank you!
EDIT:
I have tried zipping and it works, thank you, but I need to add the items to the dictionary one by one (I'm trying to have entries with the same keys add the values together for instance apple:10 and apple:5 become apple:15)
FOR EXAMPLE:
x_list = (blue, orange, purple, green, yellow, green, blue)
y_list = (1, 2, 5, 2, 4, 3, 8)
I would like the output to be
dictionary = {blue:9, orange:2, purple:5, green:5, yellow:4}
and the lists are continuously added to.
I would use a Counter
here:
from collections import Counter
c = Counter()
for k, v in zip(x_list, y_list):
c[k] += v
Try this:
dct = {}
x_list = (blue, orange, purple, green, yellow, green, blue)
y_list = (1, 2, 5, 2, 4, 3, 8)
for i in range(len(x_list)):
if x_list[i] in dct.keys():
dct[x_list[i]] += y_list[i]
else:
dct[x_list[i]] = y_list[i]
print dct
Short solution using enumerate
function:
x_list = ['blue', 'orange', 'purple', 'green', 'yellow', 'green', 'blue']
y_list = [1, 2, 5, 2, 4, 3, 8]
result = {}
for i, v in enumerate(x_list):
result[v] = y_list[i] if not result.get(v) else result[v] + y_list[i]
print(result)
The output:
{'yellow': 4, 'orange': 2, 'blue': 9, 'green': 5, 'purple': 5}
Try this code:
list_x =["apple", "mango", "orange", "apple","mango"]
list_y = [10,5,25,10,15]
total_dict = {}
for k, v in zip(list_x, list_y):
total_dict[k] = total_dict.get(k,0)+v
The value of total_dict
ends up as:
{'orange': 25, 'mango': 20, 'apple': 20}
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