How to store exponential values using python

I am looking for a way to p开发者_如何学运维erform a digit divided by larger value(2/5000000) and then store that value in table, but the problem is when i save that value, only 0 is stored , instead of correct value.I tried with float, double precision, but still only 0 is stored, is there any other way .

Thank you

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Remember to operate on floating numbers, and not convert it after the operation. E.g. 2/5000000.

Also, use the Decimal library, if you are looking for more accurate decimals.

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You need to use floating point division. To be explicit, you can cast ints to float:

>>> a = 2
>>> b = 5000000
>>> c = a/float(b)
>>> c
4e-07

You can cast either a or b to float.