The error message is pretty helpful here:
>>> count = 10
>>> print "components required to explain 50% variance : %d" % (count)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ValueError: unsupported format character 'v' (0x76) at index 35
So python sees % v
and it thinks that it is a format code. However, v
isn't a supported format character so it raises an error.
The fix is obvious once you know it -- You need to escape the %
s that aren't part of a format code. How do you do that? By adding another %
:
>>> print "components required to explain 50%% variance : %d" % (count)
components required to explain 50% variance : 10
Note that you could also use .format
which is more convenient and powerful in a lot of circumstances:
>>> print "components required to explain 50% variance : {:d}".format(count)
components required to explain 50% variance : 10