On 09/21/2012 08:31:45 AM, Philip Webb wrote:
120920 Willie WY Wong wrote:
> Unless you want to load the math module every time you start Python,
> it is perhaps better to create an alias in Bash
> using the `-i' option of Python:
> alias python-calc='python -i loadmath.py'
> or if you only need one single command
> alias python-calc='python -i -c "from math import *"'
> which will give you an interactive session with math functions
preloaded.
Yes thanks: the 2nd is the simplest way to do what I want.
> 120919 Marc Joliet described how to set a level of precision:
Thanks too, but that's not what I wanted: it's not for printing,
but simply to limit the display to eg 4 decimal places, not 16 ;
the calculations still wb as accurate, but the output easier to read.
Is that possible with Python ? -- ie a setting in ascript.py
to tell Python to display only the 1st 4 places in all output
without any further input from the user when doing the calculations;
presumably it wb a command s/he could enter when in interactive mode
too.
You could subclass the builtin float class like
#!/usr/bin/python3
class myfloat(float) :
def __init__(self,value):
super().__init__(self,value)
def __str__(self):
S= super().__str__()
return S[:5]
X=3.1415926
print(myfloat(X))
Helmut.
