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new methods for Fraction __radd__ __rsub__ __r*__

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Lafrite
2014-02-22 07:23:42 +01:00
parent 9dfc0b9c47
commit ceab817c28
2 changed files with 131 additions and 8 deletions
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111
pymath/fraction.py
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@@ -94,6 +94,42 @@ class Fraction(object):
return steps
def __radd__(self, other):
if type(other) == Fraction:
#cool
number = other
else:
number = Fraction(other)
steps = []
if number._denom == self._denom:
com_denom = number._denom
num1 = number._num
num2 = self._num
else:
gcd_denom = gcd(number._denom, self._denom)
coef1 = self._denom // gcd_denom
coef2 = number._denom // gcd_denom
steps.append([number._num, coef1, "*", number._denom, coef1, "*", '/', self._num, coef2, "*", self._denom, coef2, "*", "/",'+'])
com_denom = number._denom * coef1
num1 = number._num * coef1
num2 = self._num * coef2
steps.append([num1, num2, '+', com_denom, '/'])
num = num1 + num2
ans_frac = Fraction(num, com_denom)
steps.append(ans_frac)
steps += ans_frac.simplify()
return steps
def __sub__(self, other):
if type(other) == Fraction:
#cool
@@ -129,6 +165,41 @@ class Fraction(object):
return steps
def __rsub__(self, other):
if type(other) == Fraction:
#cool
number = other
else:
number = Fraction(other)
steps = []
if number._denom == self._denom:
com_denom = number._denom
num1 = number._num
num2 = self._num
else:
gcd_denom = gcd(number._denom, self._denom)
coef1 = self._denom // gcd_denom
coef2 = number._denom // gcd_denom
steps.append([number._num, coef1, "*", number._denom, coef1, "*", '/', self._num, coef2, "*", self._denom, coef2, "*", "/",'-'])
com_denom = number._denom * coef1
num1 = number._num * coef1
num2 = self._num * coef2
steps.append([num1, num2, '-', com_denom, '/'])
num = num1 - num2
ans_frac = Fraction(num, com_denom)
steps.append(ans_frac)
steps += ans_frac.simplify()
return steps
def __neg__(self):
return [Fraction(-self._num,self._denom)]
@@ -140,7 +211,6 @@ class Fraction(object):
number = Fraction(other)
steps = []
#steps.append("( {num1} * {num2} ) / ( {denom1} * {denom2} )".format(num1 = self._num, num2 = number._num, denom1 = self._denom, denom2 = number._denom))
steps.append([self._num, number._num, '*', self._denom, number._denom, '*', '/'])
@@ -153,6 +223,26 @@ class Fraction(object):
return steps
def __rmul__(self, other):
if type(other) == Fraction:
#cool
number = other
else:
number = Fraction(other)
steps = []
steps.append([number._num, self._num, '*', number._denom, self._denom, '*', '/'])
num = self._num * number._num
denom = self._denom * number._denom
ans_frac = Fraction(num, denom)
steps.append(ans_frac)
steps += ans_frac.simplify()
return steps
def __truediv__(self, other):
if type(other) == Fraction:
#cool
@@ -162,10 +252,25 @@ class Fraction(object):
steps = []
number = Fraction(number._denom, number._num)
steps.append([self, number, "/"])
steps += self * number
return steps
def __rtruediv__(self, other):
if type(other) == Fraction:
#cool
number = other
else:
number = Fraction(other)
steps = []
self_inv = Fraction(self._denom, self._num)
steps.append([number, self_inv, "/"])
steps += number * self_inv
return steps
def __eq__(self, other):
""" == """
if type(other) == Fraction:
@@ -197,10 +302,10 @@ if __name__ == '__main__':
h = Fraction(-1,5)
t = Fraction(-4,5)
print("---------")
for i in (f - 1):
for i in (f / t):
print(i)
print("---------")
for i in (f + 1):
for i in (f / h):
print(i)
print("---------")
for i in (f - g):