Python 'astype' not working

Question

I am currently using Spyder from Anaconda and I am trying to convert an array containing type float to type int:

x = np.array([1, 2, 2.5])
x.astype(int)
print x

The result still comes out unchanged:

[1. 2. 2.5]

Thoughts?

Solution

astype returns a new array. You need to assign the result to x:

In [298]: x = x.astype(int)

In [299]: x
Out[299]: array([1, 2, 2])

Comments

[user2590144]

When I print it in the program now, it works. But when I try to write it out to a file, it gets written out in float/scientific notation. How do I get it to write to a file as int? (I am using: np.savetxt(outfile_name, array, header = str(dimension), comments = '') )

[unutbu]

Use np.savetxt(outfile_name, array, fmt='%d', ...)

[Debadatta]

Thanks, totally forgot that astype returns a value