def eval(self, env):
"""
>>> from reader import read
>>> new_env = global_env.copy()
>>> new_env.update({'a': Number(1), 'b': Number(2)})
>>> add = CallExpr(Name('add'), [Literal(3), Name('a')])
>>> add.eval(new_env)
Number(4)
>>> new_env['a'] = Number(5)
>>> add.eval(new_env)
Number(8)
>>> read('max(b, a, 4, -1)').eval(new_env)
Number(5)
>>> read('add(mul(3, 4), b)').eval(new_env)
Number(14)
"""
operator = self.operator.eval(env)
operands = [op.eval(env) for op in self.operands]
return operator.apply(operands)
def eval(self, env):
"""
>>> from reader import read
>>> new_env = global_env.copy()
>>> new_env.update({"a": Number(1), "b": Number(2)})
>>> add = CallExpr(Name("add"), [Literal(3), Name("a")])
>>> add.eval(new_env)
Number(4)
>>> new_env["a"] = Number(5)
>>> add.eval(new_env)
Number(8)
>>> read("max(b, a, 4, -1)").eval(new_env)
Number(5)
>>> read("add(mul(3, 4), b)").eval(new_env)
Number(14)
"""
"*** YOUR CODE HERE ***"
operator = self.operator.eval(env)
operands = [arg.eval(env) for arg in self.operands]
return operator.apply(operands)
def eval(self, env):
"""
>>> from reader import read
>>> new_env = global_env.copy()
>>> new_env.update({'a': Number(1), 'b': Number(2)})
>>> add = CallExpr(Name('add'), [Literal(3), Name('a')])
>>> add.eval(new_env)
Number(4)
>>> new_env['a'] = Number(5)
>>> add.eval(new_env)
Number(8)
>>> read('max(b, a, 4, -1)').eval(new_env)
Number(5)
>>> read('add(mul(3, 4), b)').eval(new_env)
Number(14)
"""
operator = self.operator.eval(env)
list = []
for index in range(0, len(self.operands)):
list.append(self.operands[index].eval(env))
return operator.apply(list)
def eval(self, env):
"""
>>> from reader import read
>>> new_env = global_env.copy()
>>> new_env.update({'a': Number(1), 'b': Number(2)})
>>> add = CallExpr(Name('add'), [Literal(3), Name('a')])
>>> add.eval(new_env)
Number(4)
>>> new_env['a'] = Number(5)
>>> add.eval(new_env)
Number(8)
>>> read('max(b, a, 4, -1)').eval(new_env)
Number(5)
>>> read('add(mul(3, 4), b)').eval(new_env)
Number(14)
"""
"*** YOUR CODE HERE ***"
try:
operator = self.operator.eval(env)
operands = [operand.eval(env) for operand in self.operands]
return operator.apply(operands)
except ZeroDivisionError as e:
return 'Error: {0}!'.format(e)
def eval(self, env):
"""
>>> from reader import read
>>> new_env = global_env.copy()
>>> new_env.update({'a': Number(1), 'b': Number(2)})
>>> add = CallExpr(Name('add'), [Literal(3), Name('a')])
>>> add.eval(new_env)
Number(4)
>>> new_env['a'] = Number(5)
>>> add.eval(new_env)
Number(8)
>>> read('max(b, a, 4, -1)').eval(new_env)
Number(5)
>>> read('add(mul(3, 4), b)').eval(new_env)
Number(14)
"""
"*** YOUR CODE HERE ***"
operands = [element.eval(env) for element in self.operands]
operator = Name.eval(self.operator, env)
return operator.apply(operands)
...
def eval(self, env):
"""
>>> from reader import read
>>> new_env = global_env.copy()
>>> new_env.update({'a': Number(1), 'b': Number(2)})
>>> add = CallExpr(Name('add'), [Literal(3), Name('a')])
>>> add.eval(new_env)
Number(4)
>>> new_env['a'] = Number(5)
>>> add.eval(new_env)
Number(8)
>>> read('max(b, a, 4, -1)').eval(new_env)
Number(5)
>>> read('add(mul(3, 4), b)').eval(new_env)
Number(14)
"""
"*** YOUR CODE HERE ***"
# 1.Evaluate the operator in the current environment
operator = self.operator.eval(env)
# 2.Evaluate the operands in the current environment
operands = [operand.eval(env) for operand in self.operands]
# 3.Apply the value of the operator, a function, to the values of the operand
return operator.apply(operands)
def eval(self, env):
"""
>>> from reader import read
>>> new_env = global_env.copy()
>>> new_env.update({'a': Number(1), 'b': Number(2)})
>>> add = CallExpr(Name('add'), [Literal(3), Name('a')])
>>> add.eval(new_env)
Number(4)
>>> new_env['a'] = Number(5)
>>> add.eval(new_env)
Number(8)
>>> read('max(b, a, 4, -1)').eval(new_env)
Number(5)
>>> read('add(mul(3, 4), b)').eval(new_env)
Number(14)
"""
operator = self.operator.eval(env)
operands = [operands.eval(env) for operands in self.operands]
if isinstance(operator, LambdaFunction) or isinstance(
operator, PrimitiveFunction):
return operator.apply(operands)
else:
return operator.eval(operands)
