If I have a list like below:
t = [[221.0, 223.0, 43.4],[32.5, 56.7, 65.4, 54.6]]
How can I add a value to each number? For example, I want to add 1 to each number so the list would look like:
tt = [[222.0, 223.0, 44.4],[33.5, 57.7, 66.4, 55.6]]
Currently, I can write the code to replace the first list with the second list, but I would like to create a new list while keeping the first one as well. Thanks!
Given that you're using lists, you can use the following nested list comprehension, which returns another nested list with 1 added to each number in the sublists:
[[j + 1 for j in i] for i in t]
[[222.0, 224.0, 44.4], [33.5, 57.7, 66.4, 55.6]]
So simply do:
t = [[221.0, 223.0, 43.4],[32.5, 56.7, 65.4, 54.6]]
tt = [[j + 1 for j in i] for i in t]
You can create the partial function with the operator add(), which adds one to another number
from functools import partial
from operator import add
add_one = partial(add, 1)
print(add_one(1))
# 2
print(add_one(2))
# 3
and map the function add_one() to each element in the sublist.
t = [[221.0, 223.0, 43.4],[32.5, 56.7, 65.4, 54.6]]
tt = [list(map(add_one, i)) for i in t]
# [[222.0, 224.0, 44.4], [33.5, 57.7, 66.4, 55.6]]
t = np.array([[221.0, 223.0, 43.4],[32.5, 56.7, 65.4, 54.6]])and then saytt = t + 1.