def quadratic_service():
# http://localhost:8080/quadratic?a=25&b=80&c=4
try:
a = float(request.query.get('a', '0.0'))
b = float(request.query.get('b', '0.0'))
c = float(request.query.get('c', '0.0'))
except ValueError:
return dict(error='Must supply a floating point radius')
x1, x2 = algebra.quadratic(a, b, c)
return template('day2/notes2/quadratic.tpl', a=a, b=b, c=c, x1=x1, x2=x2)
def quadratic_solver():
a = float(request.query.get('a', '0'))
b = float(request.query.get('b', '0'))
c = float(request.query.get('c', '0'))
try:
x1, x2 = algebra.quadratic(a, b, c)
except ZeroDivisionError:
x1 = x2 = 0
if 'text/html' in request.headers.get('Accept', ''):
return template('notes/quadratic.tpl', a=a, b=b, c=c, x1=x1, x2=x2)
x1 = complex(x1)
x2 = complex(x2)
return dict(service=request.path,
a=a,
b=b,
c=c,
x1=dict(real=x1.real, imag=x1.imag),
x2=dict(real=x2.real, imag=x2.imag))
except RuntimeError:
raise ValueError('Negative base or height not supported, use positive inputs instead')
algebra.area_triangle = better_area_triangle # Step 3: Monkey patch
orig_sqrt = math.sqrt # Step 1: Save reference to original
def better_sqrt(x): # Step 2: Write a wrapper function
'Wraps math.sqrt to add support for negative inputs'
if x >= 0.0:
return orig_sqrt(x)
return orig_sqrt(-x) * 1j
math.sqrt = better_sqrt # Step 3: Monkey patch
#############################################################################
if __name__ == '__main__':
print u'My sources tell me that \N{greek small letter pi} =', algebra.pi
print 'and that the area of a circle of radius ten is:', algebra.area(10)
print 'The area of the 1st triangle is', algebra.area_triangle(base=25, height=10)
try:
print 'The area of the 2nd triangle is', algebra.area_triangle(base=-5, height=20)
except ValueError:
print '... oops, I did it again!'
print u'The solutions to 12x\N{superscript two} + 23x + 10 = 0 are:'
print algebra.quadratic(a=12, b=23, c=10)
print u'The solutions to 12x\N{superscript two} + 8x + 10 = 0 are:'
print algebra.quadratic(a=12, b=8, c=10)
def test_is_not_a_quadratic_function(self):
# 0x^2 + 1x + 0 : isn't a quadratic
with pytest.raises(ValueError):
algebra.quadratic(0, 1, 0)
def test_has_no_x_intercepts_2(self):
# -x^2 - 1 : no X intercepts
assert [] == algebra.quadratic(-1, 0, -1)
def test_has_no_x_intercepts_1(self):
# x^2 + 1 : no X intercepts
assert [] == algebra.quadratic(1, 0, 1)
def test_has_one_x_intercept_2(self):
# -x^2
assert [0] == algebra.quadratic(-1, 0, 0)
def test_has_x_intercepts_3(self):
# 3x^2 + 3x
assert [-1.0, 0] == algebra.quadratic(3, 3, 0)
def test_has_x_intercepts_2(self):
# x^2 - 4
assert [-2.0, 2.0] == algebra.quadratic(1, 0, -4)
def test_has_x_intercepts_1(self):
# -2x^2 + x + 3
assert [-1.0, 1.5] == algebra.quadratic(-2, 1, 3)
