introduce Step remove pstf_factory in Expression
This commit is contained in:
Benjamin Bertrand
parent
79104522ac
commit
219037e87a
@ -8,6 +8,7 @@ from .generic import flatten_list, expand_list, isOperator, isNumerand
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from .str2tokens import str2tokens
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from .operator import op
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from .explicable import Explicable, Explicable_int, Explicable_Decimal
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from .step import Step
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from decimal import Decimal
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from .random_expression import RdExpression
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@ -15,41 +16,41 @@ from .random_expression import RdExpression
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__all__ = ['Expression']
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def pstf_factory(pstf_tokens):
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"""Factory which tranform postfix tokens list into an Expression or the simpliest object type ready to be rendered
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:param pstf_tokens: a postfix tokens list
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:returns: the object
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>>> from .operator import op
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>>> pstf_t = [2, 3, op.add]
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>>> pstf_factory(pstf_t)
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< Expression [2, 3, +]>
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>>> pstf_factory([2])
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2
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>>> type(pstf_factory([2]))
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<class 'pymath.calculus.explicable.Explicable_int'>
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>>> pstf_factory([2.45])
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Decimal('2.45')
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>>> type(pstf_factory([2.45]))
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<class 'pymath.calculus.explicable.Explicable_Decimal'>
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>>> from .fraction import Fraction
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>>> f = Fraction(1,2)
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>>> pstf_factory([f])
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< Fraction 1 / 2>
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"""
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if len(pstf_tokens) == 1:
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if isinstance(pstf_tokens[0], int):
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return Explicable_int(pstf_tokens[0])
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elif isinstance(pstf_tokens[0], Decimal):
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return Explicable_Decimal(pstf_tokens[0])
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elif isinstance(pstf_tokens[0], float):
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return Explicable_Decimal(Decimal(str(pstf_tokens[0])))
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elif hasattr(pstf_tokens[0], 'STR_RENDER'):
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return pstf_tokens[0]
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return Expression(pstf_tokens)
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# def pstf_factory(pstf_tokens):
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# """Factory which tranform postfix tokens list into an Expression or the simpliest object type ready to be rendered
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#
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# :param pstf_tokens: a postfix tokens list
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# :returns: the object
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#
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# >>> from .operator import op
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# >>> pstf_t = [2, 3, op.add]
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# >>> pstf_factory(pstf_t)
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# < Expression [2, 3, +]>
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# >>> pstf_factory([2])
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# 2
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# >>> type(pstf_factory([2]))
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# <class 'pymath.calculus.explicable.Explicable_int'>
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# >>> pstf_factory([2.45])
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# Decimal('2.45')
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# >>> type(pstf_factory([2.45]))
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# <class 'pymath.calculus.explicable.Explicable_Decimal'>
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# >>> from .fraction import Fraction
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# >>> f = Fraction(1,2)
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# >>> pstf_factory([f])
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# < Fraction 1 / 2>
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#
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# """
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# if len(pstf_tokens) == 1:
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# if isinstance(pstf_tokens[0], int):
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# return Explicable_int(pstf_tokens[0])
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# elif isinstance(pstf_tokens[0], Decimal):
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# return Explicable_Decimal(pstf_tokens[0])
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# elif isinstance(pstf_tokens[0], float):
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# return Explicable_Decimal(Decimal(str(pstf_tokens[0])))
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# elif hasattr(pstf_tokens[0], 'STR_RENDER'):
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# return pstf_tokens[0]
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#
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# return Expression(pstf_tokens)
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class Expression(Explicable):
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@ -68,44 +69,44 @@ class Expression(Explicable):
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random_generator = RdExpression(form, conditions)
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return Expression(random_generator(val_min, val_max))
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@classmethod
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def tmp_render(cls, render=lambda _, x: pstf_factory(x)):
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""" Same ad tmp_render for Renderable but default render is Expression
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# @classmethod
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# def tmp_render(cls, render=lambda _, x: pstf_factory(x)):
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# """ Same ad tmp_render for Renderable but default render is Expression
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>>> exp = Expression("2*3/5")
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>>> print(exp)
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2 \\times \\frac{ 3 }{ 5 }
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>>> for i in exp.simplify().explain():
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... print(i)
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2 \\times \\frac{ 3 }{ 5 }
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\\frac{ 3 }{ 5 } \\times 2
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\\frac{ 3 \\times 2 }{ 5 }
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\\frac{ 6 }{ 5 }
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>>> with Expression.tmp_render():
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... for i in exp.simplify().explain():
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... i
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< Expression [2, 3, 5, /, *]>
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< Expression [2, < Fraction 3 / 5>, *]>
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< Expression [< Fraction 3 / 5>, 2, *]>
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< Expression [3, 2, *, 5, /]>
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< Expression [6, 5, /]>
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>>> from .render import txt
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>>> with Expression.tmp_render(txt):
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... for i in exp.simplify().explain():
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... print(i)
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2 * 3 / 5
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3 / 5 * 2
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( 3 * 2 ) / 5
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6 / 5
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>>> for i in exp.simplify().explain():
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... print(i)
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2 \\times \\frac{ 3 }{ 5 }
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\\frac{ 3 }{ 5 } \\times 2
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\\frac{ 3 \\times 2 }{ 5 }
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\\frac{ 6 }{ 5 }
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# >>> exp = Expression("2*3/5")
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# >>> print(exp)
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# 2 \\times \\frac{ 3 }{ 5 }
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# >>> for i in exp.simplify().explain():
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# ... print(i)
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# 2 \\times \\frac{ 3 }{ 5 }
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# \\frac{ 3 }{ 5 } \\times 2
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# \\frac{ 3 \\times 2 }{ 5 }
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# \\frac{ 6 }{ 5 }
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# >>> with Expression.tmp_render():
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# ... for i in exp.simplify().explain():
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# ... i
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# < Expression [2, 3, 5, /, *]>
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# < Expression [2, < Fraction 3 / 5>, *]>
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# < Expression [< Fraction 3 / 5>, 2, *]>
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# < Expression [3, 2, *, 5, /]>
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# < Expression [6, 5, /]>
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# >>> from .render import txt
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# >>> with Expression.tmp_render(txt):
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# ... for i in exp.simplify().explain():
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# ... print(i)
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# 2 * 3 / 5
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# 3 / 5 * 2
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# ( 3 * 2 ) / 5
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# 6 / 5
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# >>> for i in exp.simplify().explain():
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# ... print(i)
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# 2 \\times \\frac{ 3 }{ 5 }
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# \\frac{ 3 }{ 5 } \\times 2
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# \\frac{ 3 \\times 2 }{ 5 }
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# \\frac{ 6 }{ 5 }
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"""
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return super(Expression, cls).tmp_render(render)
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# """
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# return super(Expression, cls).tmp_render(render)
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def __init__(self, exp):
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"""Create Expression objects
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@ -261,7 +262,7 @@ class Expression(Explicable):
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>>> f = Expression('3*4+5')
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>>> f1 = f.simplify()
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>>> Expression.develop_steps([e1, f1, op.add])
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[< Expression [1, 2, +, 3, 4, *, 5, +, +]>, < Expression [3, 12, 5, +, +]>]
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[< Step [1, 2, +, 3, 4, *, 5, +, +]>, < Step [3, 12, 5, +, +]>, < Step [3, 17, +]>]
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>>> e = Expression('1+2')
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>>> e1 = e.simplify()
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>>> f = Expression('3*4+5')
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@ -269,13 +270,13 @@ class Expression(Explicable):
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>>> g = Expression('6+7')
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>>> g1 = g.simplify()
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>>> Expression.develop_steps([e1, f1, op.add, g1, op.mul])
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[< Expression [1, 2, +, 3, 4, *, 5, +, +, 6, 7, +, *]>, < Expression [3, 12, 5, +, +, 13, *]>]
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[< Step [1, 2, +, 3, 4, *, 5, +, +, 6, 7, +, *]>, < Step [3, 12, 5, +, +, 13, *]>, < Step [3, 17, +, 13, *]>]
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"""
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with Expression.tmp_render():
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with Step.tmp_render():
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tmp_steps = list(Explicable.merge_history(tokenList))
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tmp_steps = list(tmp_steps)[:-1]
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steps = [Expression(s) for s in tmp_steps]
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tmp_steps = list(tmp_steps)
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steps = [Step(s) for s in tmp_steps]
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return steps
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@classmethod
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68
pymath/calculus/step.py
Normal file
68
pymath/calculus/step.py
Normal file
@ -0,0 +1,68 @@
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#!/usr/bin/env python
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# encoding: utf-8
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from .renderable import Renderable
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__all__ = ['Step']
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class Step(Renderable):
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"""
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A step is a Renderable which his only goal is to be render.
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"""
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@classmethod
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def tmp_render(cls):
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""" Create a container in which the method explain return only Step object.
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>>> from .expression import Expression
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>>> exp = Expression("2*3/5")
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>>> print(exp)
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2 \\times \\frac{ 3 }{ 5 }
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>>> for i in exp.simplify().explain():
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... print(i)
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2 \\times \\frac{ 3 }{ 5 }
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\\frac{ 3 }{ 5 } \\times 2
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\\frac{ 3 \\times 2 }{ 5 }
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\\frac{ 6 }{ 5 }
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>>> with Step.tmp_render():
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... for i in exp.simplify().explain():
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... print(i)
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< Step [2, 3, 5, /, *]>
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< Step [3, 5, /, 2, *]>
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< Step [3, 2, *, 5, /]>
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< Step [6, 5, /]>
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>>> for i in exp.simplify().explain():
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... print(i)
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2 \\times \\frac{ 3 }{ 5 }
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\\frac{ 3 }{ 5 } \\times 2
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\\frac{ 3 \\times 2 }{ 5 }
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\\frac{ 6 }{ 5 }
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"""
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return super(Step, cls).tmp_render(Step)
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def __init__(self, pstf_tokens):
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"""Initiate the renderable objet
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:param pstf_tokens: the postfix list of tokens
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>>> s = Step([2, 3, '+'])
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>>> s
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< Step [2, 3, '+']>
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>>> s1 = Step([s, 5, '*'])
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>>> s1
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< Step [2, 3, '+', 5, '*']>
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"""
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self.postfix_tokens = []
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for t in pstf_tokens:
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try:
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self.postfix_tokens += t.postfix_tokens
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except AttributeError:
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self.postfix_tokens.append(t)
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# -----------------------------
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# Reglages pour 'vim'
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# vim:set autoindent expandtab tabstop=4 shiftwidth=4:
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# cursor: 16 del
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