How to keep one decimal place in python

Method 1

Use round function

For example:

a=12.34567889
round(a,1)=12.3 保留一位小数
round(a,2)=12.35 保留二位小数

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Method 2

"%.1f"%a

For example ：

a=12.34567889
print（“%.1f”%a) 保留一位小数
print（“%.3f”%a) 保留三位小数
print（“%.4f”%a) 保留四位小数

Method 3

First introduce the decima function

from decimal import Decimal
a=134.5657768
t=Decimal(“134.5657768”).quantize(Decimal(“0.0”))
print(t)

Output result:

134.5

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