pystellibs.ezunits package

Submodules

pystellibs.ezunits.pint module

pint

Pint is Python module/package to define, operate and manipulate physical quantities: the product of a numerical value and a unit of measurement. It allows arithmetic operations between them and conversions from and to different units.

copyright:

2012 by Hernan E. Grecco.

license:

BSD, see LICENSE for more details.

class pystellibs.ezunits.pint.AliasDict() -> new empty dictionary dict(mapping) -> new dictionary initialized from a mapping object's (key, value) pairs dict(iterable) -> new dictionary initialized as if via: d = {} for k, v in iterable: d[k] = v dict(**kwargs) -> new dictionary initialized with the name=value pairs in the keyword argument list.  For example:  dict(one=1, two=2)

Bases: dict

Methods

clear()
copy()
fromkeys(iterable[, value])	Create a new dictionary with keys from iterable and values set to value.
get(key[, default])	Return the value for key if key is in the dictionary, else default.
items()
keys()
pop(k[,d])	If key is not found, d is returned if given, otherwise KeyError is raised
popitem(/)	Remove and return a (key, value) pair as a 2-tuple.
setdefault(key[, default])	Insert key with a value of default if key is not in the dictionary.
update([E, ]**F)	If E is present and has a .keys() method, then does: for k in E: D[k] = E[k] If E is present and lacks a .keys() method, then does: for k, v in E: D[k] = v In either case, this is followed by: for k in F: D[k] = F[k]
values()

add_alias
get_aliased

add_alias(key, value, preferred=False)

get_aliased(key)

exception pystellibs.ezunits.pint.DimensionalityError(units1, units2, dim1=None, dim2=None)

Bases: ValueError

Raised when trying to convert between incompatible units.

exception pystellibs.ezunits.pint.UndefinedUnitError(unit_names)

Bases: ValueError

Raised when the units are not defined in the unit registry.

class pystellibs.ezunits.pint.UnitRegistry(filename='', force_ndarray=False)

Bases: object

The unit registry stores the definitions and relationships between units.

Parameters:

• filename – path of the units definition file to load. Empty to load the default definition file. None to leave the UnitRegistry empty.

• force_ndarray – convert any input, scalar or not to a numpy.ndarray.

Methods

add_from_file(filename)	Add units and prefixes defined in a definition text file.
add_prefix(name, value[, aliases])	Add prefix to the registry.
add_unit(name, value[, aliases])	Add unit to the registry.
get_alias(name)	Return the preferred alias for a unit

add_from_file(filename)

Add units and prefixes defined in a definition text file.

add_prefix(name, value, aliases=())

Add prefix to the registry.

add_unit(name, value, aliases=(), **modifiers)

Add unit to the registry.

get_alias(name)

Return the preferred alias for a unit

class pystellibs.ezunits.pint.UnitsContainer(*args, **kwargs)

Bases: dict

The UnitsContainer stores the product of units and their respective exponent and implements the corresponding operations

Methods

clear()
copy()
fromkeys(iterable[, value])	Create a new dictionary with keys from iterable and values set to value.
get(key[, default])	Return the value for key if key is in the dictionary, else default.
items()
keys()
pop(k[,d])	If key is not found, d is returned if given, otherwise KeyError is raised
popitem(/)	Remove and return a (key, value) pair as a 2-tuple.
setdefault(key[, default])	Insert key with a value of default if key is not in the dictionary.
update([E, ]**F)	If E is present and has a .keys() method, then does: for k in E: D[k] = E[k] If E is present and lacks a .keys() method, then does: for k, v in E: D[k] = v In either case, this is followed by: for k in F: D[k] = F[k]
values()

add

add(key, value)

pystellibs.ezunits.pint.converter_from_reference(scale, offset, log_base)

pystellibs.ezunits.pint.converter_to_reference(scale, offset, log_base)

Module contents

pint

Pint is Python module/package to define, operate and manipulate physical quantities: the product of a numerical value and a unit of measurement. It allows arithmetic operations between them and conversions from and to different units.

copyright:

3. 2012 by Hernan E. Grecco.

license:

BSD, see LICENSE for more details.

pystellibs.ezunits.hasUnit(val)