np.zeros(size[,type])

(tensorflow) ruoke@ruoke:~$ ipython
Python 3.7.7 (default, May  7 2020, 21:25:33)
Type 'copyright', 'credits' or 'license' for more information
IPython 7.14.0 -- An enhanced Interactive Python. Type '?' for help.

In [1]: import numpy as np

In [2]: a0 = np.zeros(3)

In [3]: a0
Out[3]: array([0., 0., 0.])

In [4]: a0 = np.zeros(3,int)

In [5]: a0
Out[5]: array([0, 0, 0])

In [6]: a0 = np.zeros((3,5))

In [7]: a0
Out[7]:
array([[0., 0., 0., 0., 0.],
       [0., 0., 0., 0., 0.],
       [0., 0., 0., 0., 0.]])

In [8]: a1 = np.ones(3)

In [9]: a1
Out[9]: array([1., 1., 1.])

In [10]: a1 = np.ones(3,str)

In [11]: a1
Out[11]: array(['1', '1', '1'], dtype='<U1')

In [12]: a1 = np.ones((3,5))

In [13]: a1
Out[13]:
array([[1., 1., 1., 1., 1.],
       [1., 1., 1., 1., 1.],
       [1., 1., 1., 1., 1.]])

In [14]: