Python matrix problems

Question

This is continued from this thread: Python matrix, any solution?

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Input

from numpy import *
import numpy

x=[[\'1\',\'7\'],
 [\'1.5         


        

Answer 1

You are missing commas between the inner lists:

x = [['1',   '7'],
     ['1.5', '8'],
     ['2',   '5.5'],
     ['2',   '9']]

The error message stemmed from Python seeing ['1','7']['1.5','8'] and trying to use the tuple ('1.5','8') as an index into the list ['1','7'].