def has(self, name):
stack, dictionary = self.world.getCurrentState()
try:
get(dictionary, name)
except KeyError:
return False
return True
def has(self, name):
stack, dictionary = self.world.getCurrentState()
try:
get(dictionary, name)
except KeyError:
return False
return True
def interpret(I, command):
'''
Given an interpreter and a string command, interpret that string on
the interpreter and return the modified interpreter.
'''
for word in command:
# Is it an integer?
try:
literal = int(word)
except ValueError:
# Is it a float?
try:
literal = float(word)
except ValueError:
# Is it a string literal?
if word.startswith('"') and word.endswith('"'):
literal = word[1:-1]
# Nope, it must be a command word.
else:
# Interpret the word.
func = get(I[1], word)
I = apply_func(I, func)
continue
# A literal was found, push it onto the stack.
I = (literal, I[0]), I[1]
return I
def interpret(I, command):
'''
Given an interpreter and a string command, interpret that string on
the interpreter and return the modified interpreter.
'''
for word in command:
# Is it an integer?
try:
literal = int(word)
except ValueError:
# Is it a float?
try:
literal = float(word)
except ValueError:
# Is it a string literal?
if word.startswith('"') and word.endswith('"'):
literal = word[1:-1]
# Nope, it must be a command word.
else:
# Interpret the word.
func = get(I[1], word)
I = apply_func(I, func)
continue
# A literal was found, push it onto the stack.
I = (literal, I[0]), I[1]
return I
def lookup(interpreter):
'''
Given a name on the top of the stack, look up the named command in
the dictionary and put it on the stack in place of the name.
'''
(name, stack), dictionary = interpreter
word = get(dictionary, name)
return (word, stack), dictionary
def lookup(interpreter):
'''
Given a name on the top of the stack, look up the named command in
the dictionary and put it on the stack in place of the name.
'''
(name, stack), dictionary = interpreter
word = get(dictionary, name)
return (word, stack), dictionary