
cli-calc¶
Powerful yet easy command line calculator.
Introduction¶
Please note: Using plain python at the command line already does provide a pretty decent calculator:
$ python
Python 3.8.5 (default, Aug 2 2020, 16:00:15)
[Clang 11.0.0 (clang-1100.0.33.17)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> 2**10
1024
>>> _ / 10
102.4
>>> import math
>>> math.pi
3.141592653589793
>>> math.sin(math.pi / 2)
1.0
>>> exit()
[ Read more about Python as a Calculator. ]
But not all is straight forward.
For example, if you want to calculate sin(pi/2)
:
First you need to
import math
,and then use it with
math.sin( math.pi / 2 )
.
But there must be a better way! And there is…
cli-calc¶
$ cli-calc
hex, int, float, : INPUT
0x0, 0, 0.0, : 2**10
2**10
0x400, 1024, 1024.0, : _ / 10
1024.0/10
0x66, 102, 102.4, : pi
pi
0x3, 3, 3.141592653589793, : sin(pi / 2)
sin(pi/2)
0x1, 1, 1.0, : q
$
More examples¶
$ cli-calc
hex, int, float, : INPUT
0x0, 0, 0.0, : cos(pi/2)
cos(pi/2)
0x0, 0, 6.123233995736766e-17, : 0xFF ^ 0b10
0xFF^0b10
0xfd, 253, 253.0, : 2**8-1
2**8-1
0xff, 255, 255.0, : log(e)
log(e)
0x1, 1, 1.0, : comb(49,6)
comb(49,6)
0xd56048, 13983816, 13983816.0, : factorial(42)
factorial(42)
0x3c1581d491b28f523c23abdf35b689c908000000000, 1405006117752879898543142606244511569936384000000000, 1.40500611775288e+51, : random()
random()
0x0, 0, 0.24958817003921918, : cmath.phase(complex(-1.0, 0.0))
cmath.phase(complex(-1.0,0.0))
0x3, 3, 3.141592653589793, : q
$
Included Math Libraries¶
Ready to use out of the box:
standard operators
-, >>, ...
standard math library
cd, log, sin, sinh, gamma, pi, e, tau, inf, nan...
cmath
phase(complex(-1.0, 0.0)), and then most of the above with complex numbers.
random
random, choice(['win', 'lose', 'draw']), mean, ...
built in functions
max, help, sum, ...
Installation¶
pip install cli-calc
Configuration¶
For convenience, add a shell script in ~/bin
:
cd ~/bin
vi cli-calc
with the following lines:
path=~/path/to/your/cli-calc/cli_calc
cd $path
./__main__.py
Make it executable:
chmod a+x cli-calc
then use it anywhere. :-)
echo "7+8" | cli-calc
cat foo.bar | cli-calc
cli-calc
Help¶
cli-calc
h
--------------------------------------------------
INPUT:
"q" for quit, "h" for help
"_" for last float value
"_int_" for last int value
"sin(pi/2)" for sinus, ...
"pi", "tau" and "e" for pi, tau and Euler
"+f" to add display for fraction, "-f" to suppress display for fraction
Other letters are:
he(x), (o)ctal, (b)inary, (i)nteger,
(f)raction, (t)ruth, i(e)ee, ieee_bi(n), f(r)om_ieee
"float" is always visible
See https://docs.python.org/3/library/math.html, use without "math."
https://www.w3schools.com/python/python_operators.asp
Try "cos(pi/2)", "0xFF ^ 0b10", "2**8-1", "factorial(42)", "help(math)"
--------------------------------------------------
hex, int, float, : INPUT
Permalink to this document as a github page
Warning¶
Use of ``eval` <https://docs.python.org/3/library/functions.html#eval>`_ is evil. However precautions are taken.
Pull Request¶
PR’s are Welcome!
Please read more about Contributing
and our development environment and tool set.
Or just simply raise an issue.
License¶
Credits¶
This project was generated with ``wemake-python-package` <https://github.com/wemake-services/wemake-python-package>`_. Current template version is: d06993f12e3ffad79652a2aec86189dee92d94dd. See what is updated since then.
Contents¶
Changelog