Count and calculation in a 2D array in Python

Question

I have 47 set of data to be analysised using Python with the following forma t and I stored the data in 2D array:

2104,3,399900 1600,3,329900 2400,3,369000...

I use len function to print the item stored in array. (The previous one has made some mistake and change to following code.)

array: with open("abc.txt", "r") as ins: 
substrings = data.read().split()
array = [map(int, substring.split(',')) for substring in substrings]
print(len(array)[0])

A part from that I also would like to do some calculation like this for each a, b and c in array like thos format:

(2104-500)**2+(1600-500)**2+...
(3-2)**2+(3-2)**2...

I wrote:

for [a for a, b, c in array] in range (len(array)[0]):
calculation_1 = ([a for a, b, c in array]) - 500)**2

for [b for a, b, c in array] in range (len(array)[1]):
calculation_2 = ([b for a, b, c in array]) - 2)**2

How can I improve the code to give the answer I want?

What exactly are you looking to count? What is your exact expected output? Is your data really just a list containing another single list? Please put together a better minimal reproducible example — idjaw
– idjaw, Commented Feb 25, 2017 at 14:45
What's \n doing there? Do you want to count that as one or two elements? And what's array: doing on the first line of your code? And what happened with the indentation? Please correct them, and clarify what you intend to do. — Sнаđошƒаӽ
– Sнаđошƒаӽ, Commented Feb 25, 2017 at 15:22

score 0 · Accepted Answer · 2017-02-25 14:57:02Z

0

In fact, you have a multi-dimension array ([][]).

The len of array is really one, but if do this

len(array[0])

is should 95.

Hope it's help

edited Feb 25, 2017 at 14:57

answered Feb 25, 2017 at 14:49

user5741800

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3 Comments

poonck1 Over a year ago

May be I should give out what I wrote in storing array: with open("abc.txt", "r") as ins: tmp = ins.read().split(" ") array = [i.split(",") for i in tmp]

user5741800 Over a year ago

@poonck1 modified my answer

Sнаđошƒаӽ Over a year ago

That's not multi-dimensional array, that's just a list with a single element, which also happens to be a list.

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