如何在Python中打印列表的元素（数组）？

Question

I have some code in python which outputs the array named datafile. One of the element of that array is: first element for example

datafile[0]=(array([[ 1.],
   [ 2.],
   [ 3.],
   [ 4.],
   [ 5.]]), array([[ 10.],
   [ 20.],
   [ 30.],
   [ 40.],
   [ 50.]]))

I like to print first and second element of the list:

First element:

(array([[ 1.],
   [ 2.],
   [ 3.],
   [ 4.],
   [ 5.]]))

What's the easy way to print or separate those elements? Thank you EDIT: If I do as you Joran said then, Once I can separate those elements, I want to superimpose plots of datafile[i][0] versus datafile[i][1].

I was trying to achieve that by doing for loop:

for i in datafile: 
     plt.plot(datafile[i][0],datafile[i][1]) 
     plt.show 

But I am getting error "list indices must be integers, not tuple ". I have been stuck on this for a while.

NEVERMIND! I fixed it! Thank you guys for your help! :)

Answer 1

ok, after the edits, I think I found the issue.

in your code:

for i in datafile: 
     plt.plot(datafile[i][0],datafile[i][1]) 
     plt.show 

You are in fact trying to use a tuple ( each datafile[i] element is a tuple) as the index when you call plot.

Try to use something like:

for element in datafile: 
     plt.plot(element[0],element[1]) 
     plt.show 

And next time, try to include as many examples, code, results, etc as you can, as it will help a lot in figuring out the solution ;)