What Is The Preferred Way To Check For An Empty (zero Element) Array?

1.	What Is The Preferred Way To Check For An Empty (zero Element) Array?
Answer» If you are CERTAIN a VARIABLE is an ARRAY, then use the SIZE attribute. If the variable may be a list or other SEQUENCE type, use len(). The size attribute is preferable to len because: >>> a = numpy.zeros((1,0)) >>> a.size 0 whereas >>> len(a) 1 If you are certain a variable is an array, then use the size attribute. If the variable may be a list or other sequence type, use len(). The size attribute is preferable to len because: >>> a = numpy.zeros((1,0)) >>> a.size 0 whereas >>> len(a) 1

Answer»

If you are CERTAIN a VARIABLE is an ARRAY, then use the SIZE attribute. If the variable may be a list or other SEQUENCE type, use len().

The size attribute is preferable to len because:

>>> a = numpy.zeros((1,0))
>>> a.size
0
whereas
>>> len(a)
1

If you are certain a variable is an array, then use the size attribute. If the variable may be a list or other sequence type, use len().

The size attribute is preferable to len because:

>>> a = numpy.zeros((1,0))
>>> a.size
0
whereas
>>> len(a)
1

Discussion