def div(a, b, lv):
e = Echo("div", lv)
e.ask("What's the result of {0} / {1}?".format(to_string(a), to_string(b)))
if b == 0:
raise ZeroDivisionError
e.answer("{0}.".format(a / b))
return a / b
def div(a, b, lv):
e = Echo("div", lv)
e.ask("What's the result of {0} / {1}?".format(to_string(a), to_string(b)))
if b == 0:
raise ZeroDivisionError
e.answer("{0}.".format(a/b))
return a/b
def map_(f, lat, lv):
e = Echo("map", lv)
e.ask("What's the result of mapping {0} to each element of {1}".format(to_string(f), to_string(lat)))
retval = []
for one in lat:
retval.append(f(one, lv))
e.answer("It's {0}".format(to_string(retval)))
return retval
def cons(x, y, lv):
e = Echo("cons", lv)
e.ask("What's cons of {0} and {1}?".format(to_string(x), to_string(y)))
if isa(y, list):
e.answer("{0}.".format(to_string([x]+y)))
return [x]+y
else:
e.answer("No answer, since the second argument to cons must be list.")
return None
def cons(x, y, lv):
e = Echo("cons", lv)
e.ask("What's cons of {0} and {1}?".format(to_string(x), to_string(y)))
if isa(y, list):
e.answer("{0}.".format(to_string([x] + y)))
return [x] + y
else:
e.answer("No answer, since the second argument to cons must be list.")
return None
def is_null(s, lv):
e = Echo("null?", lv)
e.ask("Is {0} an empty list?".format(to_string(s)))
if isa(s, list):
e.answer("Yes.") if s==[] else e.answer("Nope.")
return s==[]
else:
e.answer("No answer since you can only ask null? of a list")
return None
def is_eq(a, b, lv):
e = Echo("eq?", lv)
e.ask("Does {0} eq to {1}?".format(to_string(a), to_string(b)))
if isa(a, str) and isa(b, str):
e.answer("Yes.") if a==b else e.answer("Nope.")
return a==b
else:
e.answer("No answer because eq? only accepts two non-numeric atoms.")
return None
def is_member(a, lat, lv):
e = Echo("member?", lv)
e.ask("Is {0} a member of {1}?".format(to_string(a), to_string(lat)))
for atom in lat:
if a == atom:
e.answer("Yes.")
return True
e.answer("Nope.")
return False
def map_(f, lat, lv):
e = Echo("map", lv)
e.ask("What's the result of mapping {0} to each element of {1}".format(
to_string(f), to_string(lat)))
retval = []
for one in lat:
retval.append(f(one, lv))
e.answer("It's {0}".format(to_string(retval)))
return retval
def is_number(s, lv):
e = Echo("number?", lv)
e.ask("Is {0} number?".format(to_string(s)))
if isa(s, int) or isa(s, float):
e.answer("Yes.")
return True
else:
e.answer("Nope.")
return False
def is_number(s, lv):
e = Echo("number?", lv)
e.ask("Is {0} number?".format(to_string(s)))
if isa(s, int) or isa(s, float):
e.answer("Yes.")
return True
else:
e.answer("Nope.")
return False
def is_null(s, lv):
e = Echo("null?", lv)
e.ask("Is {0} an empty list?".format(to_string(s)))
if isa(s, list):
e.answer("Yes.") if s == [] else e.answer("Nope.")
return s == []
else:
e.answer("No answer since you can only ask null? of a list")
return None
def is_member(a, lat, lv):
e = Echo("member?", lv)
e.ask("Is {0} a member of {1}?".format(to_string(a), to_string(lat)))
for atom in lat:
if a == atom:
e.answer("Yes.")
return True
e.answer("Nope.")
return False
def is_eq(a, b, lv):
e = Echo("eq?", lv)
e.ask("Does {0} eq to {1}?".format(to_string(a), to_string(b)))
if isa(a, str) and isa(b, str):
e.answer("Yes.") if a == b else e.answer("Nope.")
return a == b
else:
e.answer("No answer because eq? only accepts two non-numeric atoms.")
return None
def is_zero(n, lv):
e = Echo("zero?", lv)
e.ask("Is {0} zero?".format(to_string(n)))
if isa(n, int) or isa(n, float):
e.answer("Yes.") if n == 0 else e.answer("Nope.")
if n == 0: return True
else: return False
else:
e.answer("No answer since you can only ask zero? of a number")
return None
def is_zero(n, lv):
e = Echo("zero?", lv)
e.ask("Is {0} zero?".format(to_string(n)))
if isa(n, int) or isa(n, float):
e.answer("Yes.") if n==0 else e.answer("Nope.")
if n==0: return True
else: return False
else:
e.answer("No answer since you can only ask zero? of a number")
return None
def car(x, lv, verbose=False):
e = Echo("car", lv)
e.ask("What's car of {0}?".format(to_string(x)))
if isa(x, str):
e.answer("No answer, because you cannot ask for the car of an atom.")
return None
elif isa(x, list):
if x == []:
e.answer("No answer, because you cannot ask for the car of the empty list.")
return None
else:
e.answer("{0}.".format(to_string(x[0])))
return x[0]
else:
e.answer("No answer, because car is only for non-empty lists.")
return None
def cdr(x, lv):
e = Echo("cdr", lv)
e.ask("What's cdr of {0}?".format(to_string(x)))
if isa(x, str):
e.answer("No answer, since you cannot ask for the cdr of an atom.")
return None
elif isa(x, list):
if x == []:
e.answer("No answer, since you cannot ask for the cdr of the empty list.")
return None
else:
e.answer("{0}.".format(to_string(x[1:])))
return x[1:]
else:
e.answer("No answer, because cdr is only for non-empty lists.")
return None
def cdr(x, lv):
e = Echo("cdr", lv)
e.ask("What's cdr of {0}?".format(to_string(x)))
if isa(x, str):
e.answer("No answer, since you cannot ask for the cdr of an atom.")
return None
elif isa(x, list):
if x == []:
e.answer(
"No answer, since you cannot ask for the cdr of the empty list."
)
return None
else:
e.answer("{0}.".format(to_string(x[1:])))
return x[1:]
else:
e.answer("No answer, because cdr is only for non-empty lists.")
return None
def car(x, lv, verbose=False):
e = Echo("car", lv)
e.ask("What's car of {0}?".format(to_string(x)))
if isa(x, str):
e.answer("No answer, because you cannot ask for the car of an atom.")
return None
elif isa(x, list):
if x == []:
e.answer(
"No answer, because you cannot ask for the car of the empty list."
)
return None
else:
e.answer("{0}.".format(to_string(x[0])))
return x[0]
else:
e.answer("No answer, because car is only for non-empty lists.")
return None
def is_atom(s, lv):
e = Echo("atom?", lv)
e.ask("Is {0} an atom?".format(to_string(s)))
e.answer("Yes.") if isa(s, str) or isa(s, int) or isa(s, float) else e.answer("Nope.")
return isa(s, str) or isa(s, int) or isa(s, float)
def is_equal(a, b, lv):
e = Echo("equal?", lv)
e.ask("Does {0} equal to {1}?".format(to_string(a), to_string(b)))
e.answer("Yes.") if a==b else e.answer("Nope.")
return a==b
def mult(a, b, lv):
e = Echo("mult", lv)
e.ask("What's the result of {0} * {1}?".format(to_string(a), to_string(b)))
e.answer("{0}.".format(a * b))
return a * b
def sub1(n, lv):
e = Echo("sub1", lv)
e.ask("What is the result of subtracting 1 from {0}?".format(to_string(n)))
e.answer("{0}.".format(n - 1))
return n - 1
def sub(a, b, lv):
e = Echo("sub", lv)
e.ask("What's the result of {0} - {1}?".format(to_string(a), to_string(b)))
e.answer("{0}.".format(a-b))
return a-b
def is_equal(a, b, lv):
e = Echo("equal?", lv)
e.ask("Does {0} equal to {1}?".format(to_string(a), to_string(b)))
e.answer("Yes.") if a == b else e.answer("Nope.")
return a == b
def is_atom(s, lv):
e = Echo("atom?", lv)
e.ask("Is {0} an atom?".format(to_string(s)))
e.answer("Yes.") if isa(s, str) or isa(s, int) or isa(
s, float) else e.answer("Nope.")
return isa(s, str) or isa(s, int) or isa(s, float)
def not_(s, lv):
e = Echo("not", lv)
e.ask("What's opposite to {0}?".format(to_string(s)))
e.answer("It's {0}".format(not s))
return not s
def lte(a, b, lv):
e = Echo("lte", lv)
e.ask("Is {0} less or equal than {1}?".format(a, b))
e.answer("Yes.") if a <= b else e.answer("Nope")
return a <= b
def sub1(n, lv):
e = Echo("sub1", lv)
e.ask("What is the result of subtracting 1 from {0}?".format(to_string(n)))
e.answer("{0}.".format(n-1))
return n-1
def gte(a, b, lv):
e = Echo("gte", lv)
e.ask("Is {0} greater or equal than {1}?".format(a, b))
e.answer("Yes.") if a >= b else e.answer("Nope.")
return a >= b
def expt(n, m, lv):
e = Echo("expt", lv)
e.ask("What is rasing {0} to the power of {1}".format(
to_string(n), to_string(m)))
e.answer("{0}.".format(n**m))
return n**m
def sub(a, b, lv):
e = Echo("sub", lv)
e.ask("What's the result of {0} - {1}?".format(to_string(a), to_string(b)))
e.answer("{0}.".format(a - b))
return a - b
def lt(a, b, lv):
e = Echo("lt", lv)
e.ask("Is {0} less than {1}?".format(a, b))
e.answer("Yes.") if a < b else e.answer("Nope.")
return a < b
def add(a, b, lv):
e = Echo("add", lv)
e.ask("What's the result of {0} + {1}?".format(to_string(a), to_string(b)))
e.answer("{0}.".format(a+b))
return a+b
def lte(a, b, lv):
e = Echo("lte", lv)
e.ask("Is {0} less or equal than {1}?".format(a, b))
e.answer("Yes.") if a <= b else e.answer("Nope")
return a <= b
def add(a, b, lv):
e = Echo("add", lv)
e.ask("What's the result of {0} + {1}?".format(to_string(a), to_string(b)))
e.answer("{0}.".format(a + b))
return a + b
def eq(a, b, lv):
e = Echo("eq", lv)
e.ask("Is {0} = {1}?".format(a, b))
e.answer("Yes.") if a == b else e.answer("Nope.")
return a == b
def lt(a, b, lv):
e = Echo("lt", lv)
e.ask("Is {0} less than {1}?".format(a, b))
e.answer("Yes.") if a < b else e.answer("Nope.")
return a < b
def not_(s, lv):
e = Echo("not", lv)
e.ask("What's opposite to {0}?".format(to_string(s)))
e.answer("It's {0}".format(not s))
return not s
def mult(a, b, lv):
e = Echo("mult", lv)
e.ask("What's the result of {0} * {1}?".format(to_string(a) ,to_string(b)))
e.answer("{0}.".format(a*b))
return a*b
def add1(n, lv):
e = Echo("add1", lv)
e.ask("What is the result of adding 1 to {0}?".format(to_string(n)))
e.answer("{0}.".format(n + 1))
return n + 1
def add1(n, lv):
e = Echo("add1", lv)
e.ask("What is the result of adding 1 to {0}?".format(to_string(n)))
e.answer("{0}.".format(n+1))
return n+1
def gt(a, b, lv):
e = Echo("gt", lv)
e.ask("Is {0} greater than {1}?".format(a, b))
e.answer("Yes.") if a > b else e.answer("Nope.")
return a > b
def expt(n, m, lv):
e = Echo("expt", lv)
e.ask("What is rasing {0} to the power of {1}".format(to_string(n), to_string(m)))
e.answer("{0}.".format(n**m))
return n**m
def gt(a, b, lv):
e = Echo("gt", lv)
e.ask("Is {0} greater than {1}?".format(a, b))
e.answer("Yes.") if a > b else e.answer("Nope.")
return a > b
def gte(a, b, lv):
e = Echo("gte", lv)
e.ask("Is {0} greater or equal than {1}?".format(a, b))
e.answer("Yes.") if a >= b else e.answer("Nope.")
return a >= b
def eq(a, b, lv):
e = Echo("eq", lv)
e.ask("Is {0} = {1}?".format(a, b))
e.answer("Yes.") if a == b else e.answer("Nope.")
return a == b