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operator selector

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This commit is contained in:
lafrite 2014-12-02 11:32:59 +01:00
parent cecf06e082
commit e1da8d2453
1 changed files with 30 additions and 6 deletions
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32
pymath/operator.py
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@ -9,11 +9,12 @@ class Operator(str):
"""The operator class, is a string (representation of the operator) with its arity"""
def __new__(cls, operator = "", priority = 0, actions = ("",""), txt = "", tex = "", arity = 2):
def __new__(cls, operator = "", name = "", priority = 0, actions = ("",""), txt = "", tex = "", arity = 2):
""" Create an Operator """
#def __new__(cls, operator, arity = 2):
op = str.__new__(cls, operator)
op.name = operator
op.operator = operator
op.name = name
op.arity = arity
op.priority = priority
op.actions = actions
@ -184,8 +185,6 @@ def operatorize(fun):
op = Operator(ans["operator"])
for (attr, value) in ans.items():
if hasattr(value, '__call__'):
#callback = lambda *args, **kwrds: value(op, *args, **kwrds)
#setattr(op, attr, callback)
setattr(op, attr, types.MethodType(value, op))
else:
setattr(op, attr, value)
@ -204,12 +203,31 @@ class ClassProperty(object):
class op(object):
""" List of admited operations """
_operators = {("+",2): "add",\
("-", 2): "sub",\
("-", 1): "sub1",\
("*", 2): "mul",\
("/", 2): "div",\
("^", 2): "pw",\
(")", 2): "par",\
}
@classmethod
def get_op(cls, op, arity = 2):
"""Return the corresponding operator
:op: symbole of the op
:arity: the arity
"""
return getattr(cls, cls._operators[(op, arity)])
@ClassProperty
@operatorize
def add(cls):
""" The operator + """
caract = {
"operator" : "+", \
"name" : "add",\
"priority" : 1, \
"arity" : 2, \
"action" : ("__add__","__radd__"), \
@ -225,6 +243,7 @@ class op(object):
""" The operator - """
caract = {
"operator" : "-", \
"name" : "sub",\
"priority" : 1, \
"arity" : 2, \
"action" : ("__sub__","__rsub__"), \
@ -254,6 +273,7 @@ class op(object):
caract = {
"operator" : "-", \
"name" : "sub1",\
"priority" : 2, \
"arity" : 1, \
"action" : "__neg__",\
@ -285,6 +305,7 @@ class op(object):
caract = {
"operator" : "*", \
"name" : "mul",\
"priority" : 4, \
"arity" : 2, \
"action" : ("__mul__","__rmul__"), \
@ -316,6 +337,7 @@ class op(object):
caract = {
"operator" : "/", \
"name" : "div",\
"priority" : 4, \
"arity" : 2, \
"txt" : "{op1} /^ {op2}",\
@ -332,6 +354,7 @@ class op(object):
""" The operator ^ """
caract = {
"operator" : "^", \
"name" : "pw",\
"priority" : 5, \
"arity" : 2, \
"action" : ("__pow__",""), \
@ -347,6 +370,7 @@ class op(object):
""" The operator ( """
caract = {
"operator" : "(", \
"name" : "par",\
"priority" : 0, \
"arity" : 0, \
}