NumPyflatten函数

此函数返回折叠成一维的数组，该函数采用以下参数。

ndarray.flatten(order)

import numpy as np 
a = np.arange(8).reshape(2,4) 

print 'The original array is:' 
print a 
print '\n'  
# default is column-major 

print 'The flattened array is:' 
print a.flatten() 
print '\n'  

print 'The flattened array in F-style ordering:' 
print a.flatten(order = 'F')

The original array is:
[[0 1 2 3]
 [4 5 6 7]]

The flattened array is:
[0 1 2 3 4 5 6 7]

The flattened array in F-style ordering:
[0 4 1 5 2 6 3 7]