Python: find position of element in array

Question

I have a CSV containing weather data like max and min temperatures, precipitation, longitude and latitude of the weather stations etc. Each category of data is stored in a single column.

I want to find the location of the maximum and minimum temperatures. Finding the max or min is easy: numpy.min(my_temperatures_column)

How can I find the position of where the min or max is located, so I can find the latitude and longitude?

Here is my attempt:

def coldest_location(data):  coldest_temp= numpy.min(mean_temp)      for i in mean_temp:          if mean_temp[i] == -24.6:             print i 

Error: List indices must be int

I saved each of the columns of my CSV into variables, so they are all individual lists.

lat          = [row[0] for row in weather_data]  # latitude long         = [row[1] for row in weather_data]  # longitude mean_temp    = [row[2] for row in weather_data]  # mean temperature  

I have resolved the problem as per the suggestion list.index(x)

mean_temp.index(coldest_temp)   coldest_location=[long[5],lat[5]]  

Unsure if asking a second question within a question is proper, but what if there are two locations with the same minimum temperature? How could I find both and their indices?

Answer 1

Have you thought about using Python list's .index(value) method? It return the index in the list of where the first instance of the value passed in is found.