Python - get elements from list

Question

From a python function, I get the following output:

['(0.412169, mississippi)']

The type indicates that it is a list. I want to extract the values from the list and save it as separate elements. I tried various functions to convert list to tuple, list to str, extracting the element by Index from the tuple or str, nothing worked out. When I try to extract the element by index, I either get '(' for the first element index 0, or when I try to extract through a iterator function, I get all the values split up like the full data set as a string.

How do I get values separately.

As the question has been closed, here the solution: You have first to get rid of the paranthesis in the string expression: string = ['(0.412169, mississippi)'] elems = string[0].replace('(','').replace(')','').split(',') Output: ['0.412169', ' mississippi'] — Code Pope
– Code Pope, Commented May 20, 2020 at 9:21
How'd you get that string in the first place? Can that be changed to something more parseable at the source? — deceze
– deceze ♦, Commented May 20, 2020 at 9:25

Gabio · Accepted Answer · 2020-05-20 09:24:35Z

2

You can iterate over your data, remove the parentheses using slicing and split the string by comma to create a list, which will be appended to your output payload:

data = ['(0.412169, mississippi)', '(0.412180, NY)']
extracted_values = []
for d in data:
    extracted_values += d[1:-1].split(",")
print(extracted_values) 
# output: ['0.412169', ' mississippi', '0.412180', ' NY']

answered May 20, 2020 at 9:24

Gabio

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Calvin-Ruiz · Accepted Answer · 2020-05-20 09:17:56Z

-1

Your list content a string, not a list. If you want to extract the content of a string, use the "eval" statement

my_tuple = eval("(0.412169, 'mississippi')")

Note that the "eval" function can be dangerous, because if your string content python code, it could be executed.

answered May 20, 2020 at 9:17

Calvin-Ruiz

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2 Comments

deceze Over a year ago

Right, use ast.literal_eval instead!

Austin Over a year ago

OP is having ['(0.412169, mississippi)'] to start with. Notice there are no quotes around string.

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