Creating a list from another lists Pandas-CodePudding

I have the following dataframe.

my_list= [(343, 4364), (221, 791), (221, 2847), (21, 1296)]

from this list I would like to pick the second value from the list values and get the following list.

new_list = [4364, 791, 2847, 1296]

Can any one help on this?

CodePudding user response：

What you are describing are just lists not pandas DataFrames. In order to get the second element, the easiest solution is probably to use list comprehension:

my_list= [(343, 4364), (221, 791), (221, 2847), (21, 1296)]
new_list = [x for _, x in my_list]
# or
new_list = [x[1] for x in my_list]

If you are indeed working with pandas, you can use [] to get desired column:

df = pandas.DataFrame([(343, 4364), (221, 791), (221, 2847), (21, 1296)])
col = df[1]

CodePudding user response：

use this snippets:

my_list= [(343, 4364), (221, 791), (221, 2847), (21, 1296)]
res=[]
for i,x in my_list:
    res.append(x)

print(res)

Output:

[4364, 791, 2847, 1296]

CodePudding user response：

You can do it with list comprehension:

my_list= [(343, 4364), (221, 791), (221, 2847), (21, 1296)]
new_list = [i[1] for i in my_list]
print(new_list)