EngUnits.py

Content

-Introduction
-Installation
-Documentation
-CivilEngUnits

Introduction

A module that will contain basic Engineering Classes and Functions for developing free, open-source Software in python

Documentation

Installation and usage

Requirements

"re",
"numpy",
"pandas",
"sympy",
"matplotlib",
"datetime"

Note

List of all Classes and argument

Class	Required Arguments	Optional Arguments
Units	``	``
Quantity	value:number, symbol:string, system_units:Units	decimal:interger
Money	value:number, symbol:string, system_units:Units	decimal:interger, date:string, year_rate:float

Class Units

This class will be the master for handle unit, it will contain all the physical quantanties and units of messurement that the software can interpret and read

Atributes

-dic_units(dic): It is a dictionary of dataframe. Its keys are the physical quantities names and its values are the Dataframe. Each DataFrame contains the symbol unit of messurement as its index and the columns Name, Factor, Description. The column Name hold the name of the unit of messurement, the column factor the number for convert into the main unit of messurement, and description an string
-all_units: A list that contain all the symbols support by the class
-unit_system(dic): dic that contain all main units. Its key are the physical quantities, its values are the symbol

Methods

Method	Required Arguments	Optional Arguments	Operation	Return
find_unit	unit:str		Checks if the unit is supported by the object.	Name of the physical quantity where the unit is allocated and False if not.
append	name:str, record:list		Append a new unit to the units DataFrame of the physical quantity name. Name must be a string and the name of a physical quantity. The reord must be a list with the following structure: [name, symbol, factor, Description]
remove	symbol:str		Removes a unit with the symbol pass from the Units class
empty	name:str		Empty units DataFrame from the name physical quantity.
set_units	units:DataFrame,name:str		Sets the units Dataframe of a given physical quantities. unit must be a DataFrame with the columns Name, Symbol, Factor and Description. The factor columnn must contain number values and at least one row must have the factor column = 1.The symbol column must contain string values.
set_unit_system	system_dic:dict		Set unit sytem for symplify all unit.The keys of the dictionary are the physical quantity name and the values are the symbol of the main unit of the physical quantity
simplify	unit:str		Perform an algebraic simplification of the unit using the unit system.

Class Quantity

This class will handle the quatities that must have a value, unit and a unit system

Atributes

-value(number): It is the messure value with a given unit of messurement
-symbol(string): Itis the symbol of the given unit use for messure the value
-system_units(Units): It the class that help to handle, operate and interpret the unit of messurement
-decimal (interger): Number of decimal that will be use for represent the object as string.
-name (string): name of the physical quantity that messure the given unit
-unit (dictionary): it have the symbol of the units as keys and the values of factors as value
-main_unit (string): the main unit of the quantity

Methods

-It allows all the basic arithmetic +,-,*,/ while checking the unit consistency. It can only add or subtract similar units. It can multiply and divide by any given unit or numerical value..
-It can compare measurement of the same physical quantity with the operators ==,>=,<=,>,>,<,!=.

Method	Required Arguments	Optional Arguments	Operation	Return
is_related	other:object		Checks if the object are related one another	True if the object is a subclass of Quantity
update_units	units:Units		Update the Units interpreter object	A copy of the Quantity object with the new units interpreter
set_factors	units:Units		Sets the factors of the units Dictionary	Update the units dictionary and the main_unit
simplify			Perform an algebraic simplification of the unit using the unit system.
convert	new_unit:str	factor:number	Convert the quantity to the given new unit using the factor if provided or using the conversion factor that the system_unit holds.	new Quantity