在Python中以十进制形式显示浮点数？

Question

Let's say I have the following float point number in Python

>>>a = 10 ** -10
>>>print a
1e-10

How can I display .0000000001 instead of 1e-10 ?

Answer 1

>>> a = "%0.10f" % (10 ** -10)
>>> a
'0.0000000001'

Answer 2

Maybe a bit more readable:

a = float("1e-10")
format(a, ".10f")

Output

'0.0000000001'

Answer 3

Or using format

>>> a = 10 ** -10
>>> '{a:0.10f}'.format(a=a)