How can I make a this list in python?

Question

Here is the sample list given, I am using the Python 3, and want to create the same list from the given panda's DataFrame from two columns Latitude and Longitude, but I don't want to use the For Loop, want to do with the Pandasfunction.

coordinates = [
    [  42.3581    ,  -71.0636    ],
    [  42.82995815,  -74.78991444],
    [  43.17929819,  -78.56603306],
    [  43.40320216,  -82.37774519],
    [  43.49975489,  -86.20965845],
    [  43.46811941,  -90.04569087],
    [  43.30857071,  -93.86961818],
    [  43.02248456,  -97.66563267],
    [  42.61228259, -101.41886832],
    [  42.08133868, -105.11585198],
    [  41.4338549 , -108.74485069],
    [  40.67471747, -112.29609954],
    [  39.8093434 , -115.76190821],
    [  38.84352776, -119.13665678],
    [  37.7833    , -122.4167    ]]

but I want it without using the for loop, is it possible with any Panda's function? or python function.

I hope this is clear now, for those people who said its not clear question.

What's wrong with what you've posted? There are no loops there. — goodvibration, Nov 01 '17 at 15:30
There is no `for` loop in your question. What have you tried? — roganjosh, Nov 01 '17 at 15:31
wait I didn't make that list, I want to make it from panda's Dataframe with two columns "Lat" and "Lon" and I want the output as given there — id101112, Nov 01 '17 at 15:32
Possible duplicate of [Pandas DataFrame to List of Lists](https://stackoverflow.com/questions/28006793/pandas-dataframe-to-list-of-lists) — yinnonsanders, Nov 01 '17 at 15:34
since someone was so kind and stopped the post ...if you want to change multidim list in onedim list use this forloop. for item in coordinates: for nitem in item: print(nitem) list.append(nitem) — veritaS, Nov 01 '17 at 15:50
@DRPK i want to pass to the some other function where it will plot all these co-ordinates on the map, so i guess dict won't work. — id101112, Nov 01 '17 at 15:53

Evan Nowak · Accepted Answer · 2017-11-01T16:49:07.783

1

Based on your minimal question, I'm assuming you have a DataFrame like this:

    Lat   Lon
0    x0    y0
1    x1    y1
2    x2    y2
3    x3    y3

And you want it in a list form like this:

[[x0, y0], [x1, y1], [x2, y2], [x3, y3]]

So you just do this:

coordinates = list(zip(df.Lat.tolist(), df.Lon.tolist()))

edited Nov 01 '17 at 16:49

answered Nov 01 '17 at 15:36

Evan Nowak

895
4
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when I print this, i get this result "" any idea – id101112 Nov 01 '17 at 15:43
Sorry, I didn't notice you were using Python 3. In Python 2 it creates a list, but in Python 3 it creates an iterator. I've updated the answer. – Evan Nowak Nov 01 '17 at 16:48
even this is creating the tuples inside the list, not the list of list, but it worked somehow.. thanks – id101112 Nov 01 '17 at 16:57

How can I make a this list in python?

1 Answers1