python科学计数法实例,将科学计数法转换为十进制-python

How do I convert a scientific notation to floating point number?

Here is an example of what I want to avoid:

Python 2.7.3 (default, Apr 14 2012, 08:58:41) [GCC] on linux2

Type "help", "copyright", "credits" or "license" for more information.

>>> a=[78.40816326530613, 245068094.16326532]

>>> print a[0]/a[1]

3.19944395589e-07

>>> print float(a[0]/a[1])

3.19944395589e-07

>>> print float(a[0])/float(a[1])

3.19944395589e-07

解决方案

The scientific notation is just a convenient way of printing a floating point number. When there are a lot of leading zeros as in your example, the scientific notation might be easier to read.

In order to print a specific number of digits after a decimal point, you can specify a format string with print:

print 'Number is: %.8f' % (float(a[0]/a[1]))

Or you can use format() as in the other answers.