dailycalc 2024.0.1

A simple calcaultor for daily usage

A Simple Calculator

Based on decimal.Decimal.

Decimal “is based on a floating-point model which was designed with people in mind, and necessarily has a paramount guiding principle – computers must provide an arithmetic that works in the same way as the arithmetic that people learn at school.” – excerpt from the decimal arithmetic specification

How to use

install

pip install dailycalc

import into your code

from dailycalc import calculate

print(calculate("sum(123+3)"))

once-off calculate

python -m dailycalc "sum(0.1, 0.2)"

iteractive mode

python -m dailycalc -i

Operators & Functions

currently supporting:

"+ - * / ^"

"sum max min abs round hex oct"

Interactive mode

Every result is stored in register from [a-z] cyclically, that is when reaching the last one "z", the register would go back to "a" and cover the old value.

"@a" gives the value in "a". "@@" gives the previous result.'

for example:

>>> 1
>>> @a: 1
>>> @a + 2
>>> @b: 3
>>> ...
>>> @z: 351
>>> @z + 1
>>> @a: 352
>>> @@- 1
>>> @b: 351

Support HEX, OCT, Scientific input

1. HEX: "0x12E", "0X12E" only support integar
2. OCT: "0o123", "0O123" only support integar
3. Scientific: "-123.12E-123" or "-123.12e+123"

Support terminal highlight in -i

Error message with highlight

>>> abs(sum(1,2,3),11)
>>> Input: abs(sum(1,2,3),11)
           ---------------^^-----
    Error: func abs: expecting 1 parameters got 2
>>>

>>> sum(1,
>>> Input: sum(1,
           ------^---
    Error: expecting Number
>>>

reference for interactive mode

--- Modes ---
STAY mode (prompt:"===") (Default)
save result by call "save" command
WALKING mode (prompt:">>>")
automatically save results and move to next register
--- Commands ---
"exit" exit program.
"show" show all results in register.
"reset" clear all results in register.
"stay" switch to STAY mode.
"go" save result & switch to WALKING mode.
"save [tag]" save result (in STAY Mode).
--- Functions ---
sum(1, 2, 2+1) => 6
max(1, sum(2, 1)) => 3
min(1, 2) => 1
abs(1-12) => 11
round(12.16, 1) => 12.2
hex(10) => 0xa
oct(10) => 0o12

Require colorama [https://pypi.org/project/colorama/]

Future Plans

add more function & operator, bugfix.