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sove bug with negative fractions display

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Lafrite
2014-12-21 16:04:44 +01:00
parent e3d1870d33
commit a38ba53577
1 changed files with 57 additions and 26 deletions
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83
pymath/polynom.py
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@@ -114,6 +114,20 @@ class Polynom(object):
:param i: power :param i: power
:returns: postfix tokens of coef :returns: postfix tokens of coef
>>> p = Polynom()
>>> p.coef_postfix([3],2)
[3, 'x', 2, '^', '*']
>>> p.coef_postfix([0],1)
[]
>>> p.coef_postfix([3],0)
[3]
>>> p.coef_postfix([3],1)
[3, 'x', '*']
>>> p.coef_postfix([1],1)
['x']
>>> p.coef_postfix([1],2)
['x', 2, '^']
""" """
# TODO: Couille certaine avec txt à qui il fait donner des opérateurs tout beau! |mar. nov. 11 13:08:35 CET 2014 # TODO: Couille certaine avec txt à qui il fait donner des opérateurs tout beau! |mar. nov. 11 13:08:35 CET 2014
ans =[] ans =[]
@@ -135,6 +149,7 @@ class Polynom(object):
:returns: the postfix list of polynom's tokens :returns: the postfix list of polynom's tokens
""" """
# TODO: Faudrait factoriser un peu tout ça..! |dim. déc. 21 16:02:34 CET 2014
postfix = [] postfix = []
for (i,a) in list(enumerate(self._coef))[::-1]: for (i,a) in list(enumerate(self._coef))[::-1]:
operator = [op.add] operator = [op.add]
@@ -151,10 +166,16 @@ class Polynom(object):
# case need to repeat the x^i # case need to repeat the x^i
for b in a: for b in a:
if len(postfix) == 0 and isNumber(b) and b < 0: if len(postfix) == 0 and isNumber(b) and b < 0:
b = [-b] try:
b = [(-b)[-1]]
except TypeError:
b = [-b]
operator_sub1 = [op.sub1] operator_sub1 = [op.sub1]
elif len(postfix) > 0 and isNumber(b) and b < 0: elif len(postfix) > 0 and isNumber(b) and b < 0:
b = [-b] try:
b = [(-b)[-1]]
except TypeError:
b = [-b]
operator = [op.sub] operator = [op.sub]
else: else:
b = [b] b = [b]
@@ -168,10 +189,16 @@ class Polynom(object):
elif a != 0: elif a != 0:
if len(postfix) == 0 and a < 0: if len(postfix) == 0 and a < 0:
try:
a = [(-a)[-1]]
except TypeError:
a = [-a] a = [-a]
operator_sub1 = [op.sub1] operator_sub1 = [op.sub1]
elif len(postfix) > 0 and a < 0: elif len(postfix) > 0 and a < 0:
a = [-a] try:
a = [(-a)[-1]]
except TypeError:
a = [-a]
operator = [op.sub] operator = [op.sub]
else: else:
a = [a] a = [a]
@@ -327,7 +354,7 @@ class Polynom(object):
steps += p.simplify() steps += p.simplify()
#print("steps -> \n", "\n".join(["\t {}".format(s._coef) for s in steps])) #print("steps -> \n", "\n".join(["\t {}".format(s.postfix) for s in steps]))
return steps return steps
@@ -343,20 +370,20 @@ def test(p,q):
print("p : ",p) print("p : ",p)
print("q : ",q) print("q : ",q)
print("\n Plus ------") #print("\n Plus ------")
print(p, "+", q) #print(p, "+", q)
for i in (p + q): #for i in (p + q):
#print(repr(i)) # #print(repr(i))
print("\t", str(i.postfix)) # #print("\t", str(i.postfix))
print(i) # print(i)
#print((p+q)[-1]._coef) ##print((p+q)[-1]._coef)
print("\n Moins ------") #print("\n Moins ------")
for i in (p - q): #for i in (p - q):
#print(repr(i)) # #print(repr(i))
#print("\t", str(i.postfix)) # #print("\t", str(i.postfix))
print(i) # print(i)
#print((p-q)[-1]._coef) ##print((p-q)[-1]._coef)
print("\n Multiplier ------") print("\n Multiplier ------")
for i in (p * q): for i in (p * q):
@@ -368,16 +395,20 @@ def test(p,q):
if __name__ == '__main__': if __name__ == '__main__':
from .fraction import Fraction from .fraction import Fraction
p = Polynom([1, -2 ]) #p = Polynom([1, -2 ])
q = Polynom([4, 7, 4]) #q = Polynom([4, 7, 4])
test(p,q) #test(p,q)
q = Polynom([0, Fraction(1,2), 0, Fraction(-4,3)]) #q = Polynom([0, Fraction(1,2), 0, Fraction(-4,3)])
test(p,q) #test(p,q)
print("\n") #print("\n")
p = Polynom([-1,-2,-3]) #p = Polynom([-1,-2,-3])
print(p) #print(p)
p = Polynom([-2])
q = Polynom([0,0,Fraction(1,2)])
test(p,q)
#p = Polynom([1, 1, 1 ]) #p = Polynom([1, 1, 1 ])
#print(p) #print(p)