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# coding=utf-8
from .simplenode import SimpleNode
from gettext import gettext as _
import math
class Pi(SimpleNode):
"""Node representing pi."""
CLASS = "pi"
background = SimpleNode.loadbackground("pi.svg")
title = _("π")
description = _(u"Returns the ratio of a circle's circumference to its "
u"diameter.\n"
u"π (pi) is approximately 3.14159")
def __call__(self, x):
"""Returns pi."""
return math.pi
def get_equation_string(self, variable):
"""Returns pi, ignoring the variable."""
return "pi"
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