assign value to numpy arrary

Question

I initialize

Tcoords = np.array([0,0])

and

Tcoords[0] =.1

but why when printing Tcoords still

Tcoords
array([0, 0])

Answer 1

Use float instead of int. It will work:

Tcoords = np.array([0.0,0.0])

Answer 2

The assigned 0.1 will be cast into an integer. Use:

>>> Tcoords = np.array([0,0], dtype=np.float)
>>> Tcoords[0] = .1
>>> Tcoords
array([ 0.1,  0. ])

This is what happens:

>>>int(0.1)
0