Python floating-point numbers retain decimals

Http://www.cnblogs.com/Raymon-Geng/p/5784290.html

Here are three ways to

Round (a,2)

'%.2f '% A

Decimal (' 5.000 '). Quantize (Decimal (' 0.00 '))

When the required output result requires two decimal places, the string form: '%.2f '% A is best, followed by decimal.

To be aware of:

1. Can be passed to a decimal integer or string parameter, but not floating point data, because the floating-point data itself is inaccurate.

2. Decimal can also be used to limit the total number of digits in the data.

Python floating-point numbers retain decimals