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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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75
pymath/polynom.py
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@ -114,6 +114,20 @@ class Polynom(object):
:param i: power
: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
ans =[]
@ -135,6 +149,7 @@ class Polynom(object):
:returns: the postfix list of polynom's tokens
"""
# TODO: Faudrait factoriser un peu tout ça..! |dim. déc. 21 16:02:34 CET 2014
postfix = []
for (i,a) in list(enumerate(self._coef))[::-1]:
operator = [op.add]
@ -151,9 +166,15 @@ class Polynom(object):
# case need to repeat the x^i
for b in a:
if len(postfix) == 0 and isNumber(b) and b < 0:
try:
b = [(-b)[-1]]
except TypeError:
b = [-b]
operator_sub1 = [op.sub1]
elif len(postfix) > 0 and isNumber(b) and b < 0:
try:
b = [(-b)[-1]]
except TypeError:
b = [-b]
operator = [op.sub]
else:
@ -168,9 +189,15 @@ class Polynom(object):
elif a != 0:
if len(postfix) == 0 and a < 0:
try:
a = [(-a)[-1]]
except TypeError:
a = [-a]
operator_sub1 = [op.sub1]
elif len(postfix) > 0 and a < 0:
try:
a = [(-a)[-1]]
except TypeError:
a = [-a]
operator = [op.sub]
else:
@ -327,7 +354,7 @@ class Polynom(object):
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
@ -343,20 +370,20 @@ def test(p,q):
print("p : ",p)
print("q : ",q)
print("\n Plus ------")
print(p, "+", q)
for i in (p + q):
#print(repr(i))
print("\t", str(i.postfix))
print(i)
#print((p+q)[-1]._coef)
#print("\n Plus ------")
#print(p, "+", q)
#for i in (p + q):
# #print(repr(i))
# #print("\t", str(i.postfix))
# print(i)
##print((p+q)[-1]._coef)
print("\n Moins ------")
for i in (p - q):
#print(repr(i))
#print("\t", str(i.postfix))
print(i)
#print((p-q)[-1]._coef)
#print("\n Moins ------")
#for i in (p - q):
# #print(repr(i))
# #print("\t", str(i.postfix))
# print(i)
##print((p-q)[-1]._coef)
print("\n Multiplier ------")
for i in (p * q):
@ -368,16 +395,20 @@ def test(p,q):
if __name__ == '__main__':
from .fraction import Fraction
p = Polynom([1, -2 ])
q = Polynom([4, 7, 4])
test(p,q)
#p = Polynom([1, -2 ])
#q = Polynom([4, 7, 4])
#test(p,q)
q = Polynom([0, Fraction(1,2), 0, Fraction(-4,3)])
test(p,q)
#q = Polynom([0, Fraction(1,2), 0, Fraction(-4,3)])
#test(p,q)
print("\n")
p = Polynom([-1,-2,-3])
print(p)
#print("\n")
#p = Polynom([-1,-2,-3])
#print(p)
p = Polynom([-2])
q = Polynom([0,0,Fraction(1,2)])
test(p,q)
#p = Polynom([1, 1, 1 ])
#print(p)