Replace Text with Other Values in Numpy Array

Question

I'm successfully returning an array that maps out the ideal path between nodes on a network.

The result is (for a sample i,j pair) something like this.

1>34>65>23>742

Now I'd like to replace the numbers with the name of the city it represents, like San Francisco (SFO), so it would read something like

SFO>LAX>DFW>JFK

I've tried using the replace functions, but to no success.

    for z in range(len(names)):
        nextstop = [sub.replace(z, names[z]) for sub in nextstop]

Where names contains the names of the airports, in the same order/index as the numbers.

Thanks!

where the numbers represent

I don't know the numbers representing cities but i suggest to use re.sub method from re module — user13824946
– user13824946, Commented Oct 15, 2020 at 22:48

Lukas S · Accepted Answer · 2020-10-15 23:22:06Z

1

Try something like this:

cities = [names[int(x)] for x in "1>34>65>23>742".split(">")]
">".join(cities)

What's happening is that "1>34>65>23>742".split(">") gives you a list of the numbers as strings. Then the list comprehension [names[int(x)] for x in "1>34>65>23>742".split(">")] takes each of those strings, turns them into numbers and looks them up in names. So now we have a list of numbers. Finally "<".join turns them back into your string format again.

answered Oct 15, 2020 at 23:22

Lukas S

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