numpy
you should learn some basic math,like matrix,integral,probablity and statistics.
You can learn https://numpy.org from if you wanna more
get function reference
print(help(numpy.xxxx))
Constructing a multidimensional array
numpy.array()
It must force conversion if the data is not the same type in array:
eg:
# constructing a array
# one dimensional array
vector = numpy.array([5,10,15,20])
# 2D array，action it has two []
matrix = numpy.array([[5,10,15],[20,25,30],[35,40,45]])
print(vector)
print(matrix)
It's hard to constructing a array which have dimensional more than three
mumpy/0.ipynb/13*14
Checking the structure of a array,we mostly use it to debug.
print(xxxx.shape)
search
print(xxxx[x......