## Convert NumPy array to Python list

Use tolist(): >>> import numpy as np >>> np.array([[1,2,3],[4,5,6]]).tolist() [[1, 2, 3], [4, 5, 6]] Note that this converts the values from whatever … Read more

Use tolist(): >>> import numpy as np >>> np.array([[1,2,3],[4,5,6]]).tolist() [[1, 2, 3], [4, 5, 6]] Note that this converts the values from whatever … Read more

The definition of asarray is: def asarray(a, dtype=None, order=None): return array(a, dtype, copy=False, order=order) So it is like array, except it has fewer … Read more

You’re not saying how exactly putdata() is not behaving. I’m assuming you’re doing >>> pic.putdata(a) Traceback (most recent call last): File “…blablabla…/PIL/Image.py”, line … Read more

That is the wrong mental model for using NumPy efficiently. NumPy arrays are stored in contiguous blocks of memory. To append rows or … Read more

np.r_[ … ] and np.c_[ … ] are useful alternatives to vstack and hstack, with square brackets [] instead of round (). A … Read more

Use numpy.set_printoptions to set the precision of the output: import numpy as np x = np.random.random(10) print(x) # [ 0.07837821 0.48002108 0.41274116 0.82993414 … Read more

How do I count the occurrence of a certain item in an ndarray?

To access column 0: >>> test[:, 0] array([1, 3, 5]) To access row 0: >>> test[0, :] array([1, 2]) This is covered in … Read more

Use numpy.set_printoptions: import sys import numpy numpy.set_printoptions(threshold=sys.maxsize)

I am trying to install python and a series of packages onto a 64bit windows 7 desktop. I have installed Python 3.4, have … Read more