def test_print_empty_stack(capsys):
stack = Stack()
stack.print()
expected = "[]\n"
output = capsys.readouterr().out
assert output == expected
def test_peek_stack_with_elements():
stack = Stack([1, 2, "Dog"])
expected = "Dog"
output = stack.peek()
assert output == expected
assert stack.stack[-1] == expected
def test_stack():
"""Fixture for testing."""
from src.stack import Stack
empty = Stack()
one = Stack(5)
multi = Stack([1, 2, 'three', 4, 5])
return empty, one, multi
def initialize_stack(num_disks):
global stacks
global left
global middle
global right
global moves
global inv_f
global min_moves
global final_answer
global game_completion_f
stacks = []
left_stack = Stack("Left")
middle_stack = Stack("Middle")
right_stack = Stack("Right")
stacks.append(left_stack)
stacks.append(middle_stack)
stacks.append(right_stack)
for i in range(num_disks, 0, -1):
stacks[0].push(i)
left = stacks[0].get_items()
middle = stacks[1].get_items()
right = stacks[2].get_items()
moves = 0
inv_f = 0
min_moves = 2**num_disks - 1
game_completion_f = 0
final_answer = left
def test_print_stack_with_elements(capsys):
stack = Stack([1, 2, 3, 4, 5])
stack.print()
expected = "[1, 2, 3, 4, 5]\n"
output = capsys.readouterr().out
assert output == expected
def test_size(self):
# test if the size is being enforced
stack = Stack(size=10)
for num in range(1000):
stack.push(num)
assert stack.size() == 10
assert stack.stack == [_ for _ in range(10)]
def test_pop_with_full_stack():
stack = Stack([2, 4, 1, 4020])
expected = 4020
output = stack.pop()
assert output == expected
assert stack.stack[-1] == 1
def dummyFunc(opcode: Opcode, bytecode: bc.Bytecode, stack: st.Stack):
if opcode.consume > 0:
stack.pop(opcode.consume, type_hint_constants.ANY)
if opcode.produce > 0:
import time
stack.push(str(int(time.time())))
def dummyFunc(opcode: Opcode, bytecode: bc.Bytecode, stack: st.Stack):
if opcode.consume > 0:
stack.pop(opcode.consume, type_hint_constants.ANY)
if opcode.produce > 0:
import time
stack.push(str(int(time.time())))
def test_push_empty_stack():
stack = Stack()
element = 230
stack.push(element)
expected = [230]
output = stack.stack
assert output == expected
def test_push(self):
s = Stack()
s.push(1)
self.assertEqual(s.top['value'], 1, 'should have inserted 1')
self.assertIsNone(s.top['prev'], 'should have nothing before')
s.push(2)
self.assertEqual(s.top['value'], 2, 'should have 2 as top')
self.assertEqual(s.top['prev']['value'], 1, 'should have 1 before')
self.assertIsNone(s.top['prev']['prev'], '1 is the last value')
class TestStack(unittest.TestCase):
def setUp(self):
self.stack = Stack()
def tearDown(self):
self.stack = None
def test_push(self):
self.stack.push("foo")
self.assertTrue(self.stack.stack.head.data == "foo")
self.assertTrue(self.stack.stack.head.next is None)
self.stack.push("bar")
self.assertTrue(self.stack.stack.head.data == "bar")
self.assertTrue(self.stack.stack.head.next.data == "foo")
def test_pop(self):
self.stack.push("foo")
self.stack.push("bar")
self.assertTrue(self.stack.stack.head.data == "bar")
self.assertTrue(self.stack.stack.head.next.data == "foo")
self.stack.pop()
self.assertTrue(self.stack.stack.head.data == "foo")
self.assertTrue(self.stack.stack.head.next is None)
def expr_to_stack(self, expr):
stack = Stack()
buf = ''
idx = len(expr) - 1
while idx >= 0:
char = expr[idx]
idx -= 1
# If 0-9 then add to buffer (for multi-digit numbers)
if char.isdigit():
buf = char + buf
continue
# Convert value from buffer to integer and move to stack
if buf != '':
stack.push(int(buf))
buf = ''
# Add operators to stack
if not char.isdigit() and char in self.allowed_operators.keys():
stack.push(char)
# Finally flush buffer into stack
if buf != '':
stack.push(int(buf))
return stack
def test_openvpn_security_group():
output = (Stack().template_to_json())
properties = output["Resources"]["OpenVPNSecurityGroup"]["Properties"]
expect(properties["GroupName"]).to.eq('OpenVPN')
expect(properties["GroupDescription"]).to.eq(
'This is a security group for OpenVPN')
expect(properties["SecurityGroupIngress"]).to.eq([{
"CidrIp": "0.0.0.0/0",
"IpProtocol": "tcp",
"FromPort": 22,
"ToPort": 22
}, {
"CidrIp": "0.0.0.0/0",
"IpProtocol": "udp",
"FromPort": 1194,
"ToPort": 1194
}])
expect(properties["SecurityGroupEgress"]).to.eq([{
'CidrIp': '0.0.0.0/0',
'FromPort': -1,
'IpProtocol': -1,
'ToPort': -1
}])
expect(properties["VpcId"]).to.eq(vpc_id)
def test_openvpn_ec2_instance():
output = (Stack().template_to_json())
properties = output["Resources"]["EC2OpenVPN"]["Properties"]
expect(properties["ImageId"]).to.eq('ami-0b69ea66ff7391e80')
expect(properties["InstanceType"]).to.eq('t2.micro')
expect(properties["KeyName"]).to.eq('rwalker')
def test_push_with_multiple_elements():
stack = Stack()
stack.push([1, 2, 3])
stack.push("Horse")
stack.push(9.321)
expected = [[1, 2, 3], "Horse", 9.321]
output = stack.stack
assert output == expected
def test_exceptions(self):
with self.assertRaises(StackUnderflowException):
s = Stack(1)
s.pop()
with self.assertRaises(StackOverflowException):
s = Stack(1)
s.push(10)
s.push(20)
def sort_stack(stack):
buffer_stack = Stack()
while(not stack.is_empty()):
value = stack.pop()
if(buffer_stack.is_empty):
buffer_stack.push(value)
else:
if(not buffer_stack.is_empty()):
while(buffer_stack.peek() > value):
temp = buffer_stack.pop()
stack.push(temp)
else:
buffer_stack.push(value)
return buffer_stack
def test_stack_exceptions(self):
with self.assertRaises(ValueError):
s = Stack("A")
with self.assertRaises(ValueError):
s = Stack(10)
s.size = "A"
with self.assertRaises(ValueError):
s = Stack(10)
s.top = "A"
def __init__(self, text: str):
# Data stack (main stack for operations).
self.__ds = Stack()
# Return stack (supports procedures work).
self.__rs = Stack()
# Instruction pointer.
self.__iptr = 0
# Input text parsed into list of values and instructions.
self.__code_list = list(self.parse(text))
# Storage for variables. Mapping names of vars to their values.
self.__heap = dict()
# Storage for procedures.
self.__procedures = dict()
# Mapping operations in our language to functions that perform the necessary business logic.
self.__valid_operations = {
'+': self.sum,
'-': self.sub,
'*': self.mult,
'/': self.div,
'%': self.mod,
'!': self.fact,
'==': self.equal,
'>': self.greater,
'<': self.less,
'and': self.operator_and,
'or': self.operator_or,
'cast_int': self.cast_int,
'cast_str': self.cast_str,
'drop': self.drop,
'over': self.over,
'dup': self.dup,
'if': self.operator_if,
'jmp': self.jump,
'stack': self.output_stack,
'swap': self.swap,
'print': self.print,
'println': self.println,
'read': self.read,
'call': self.call,
'return': self.ret,
'exit': self.exit,
'store': self.store,
'load': self.load,
}
def test_push():
"""Test push."""
s = Stack()
s.push(3)
s.push(5)
s.push(7)
assert len(s.data) == 3
assert not s.is_empty()
def test_pop(self):
s = Stack()
value = s.pop()
self.assertIsNone(value, 'should return None from empty stack')
s.push(1)
value = s.pop()
self.assertEqual(value, 1, 'should return the stack value')
self.assertEqual(s.pop(), None, 'should remain an empty stack')
def test_pop(self):
s = Stack(10)
s.push(20)
s.push(10)
value = s.pop()
assert value == 10
assert s.top.value == 20
assert s.top.next == None
s.pop()
assert s.top == None
def test_size(self):
s = Stack(10)
s.push(10)
s.push(20)
assert s.size == 2
s.pop()
s.pop()
assert s.size == 0
def test_push(self):
s = Stack(10)
s.push(10)
assert s.top.value == 10
assert s.top.next == None
s.push(20)
assert s.top.value == 20
assert s.top.next.value == 10
def validate_brackets(sentence):
brackets = Stack()
for char in sentence:
if char == '(':
brackets.push(True)
elif char == ')':
if brackets.pop() is not True:
return False
return brackets.size() == 0
def generate(self, z, sample, max_length):
"""Generate a valid expression from z using the decoder"""
logits_all = self.decoder(z, max_length=max_length).squeeze()
rules_all = []
for logits in logits_all:
t = 0
stack = Stack(grammar=GCFG, start_symbol=START)
rules = []
while stack.nonempty:
alpha = stack.pop()
print(alpha)
mask = get_mask(alpha, stack.grammar, as_variable=True)
probs = mask * logits[t].exp()
probs = probs / probs.sum()
if sample:
m = Categorical(probs)
i = m.sample()
else:
_, i = probs.max(-1) # argmax
# convert PyTorch Variable to regular integer
i = i.item()
# select rule i
rule = stack.grammar.productions()[i]
rules.append(rule)
# add rhs nonterminals to stack in reversed order
for symbol in reversed(rule.rhs()):
if isinstance(symbol, Nonterminal):
stack.push(symbol)
t += 1
if t == max_length:
break
rules_all.append(rules)
# if len(rules) < 15:
# pad = [stack.grammar.productions()[-1]]
return rules_all
def test_pop(self):
s = Stack()
value = s.pop()
self.assertIsNone(value, 'should return None from empty stack')
s.push(1)
value = s.pop()
self.assertEqual(value, 1, 'should return the stack value')
self.assertEqual(s.pop(), None, 'should remain an empty stack')
def calculate_span(stock_price: list):
if len(stock_price) == 0:
raise ValueError("The list cannot be an empty list")
if not isinstance(stock_price, list):
raise ValueError("The `stocks_prices` must be a list")
if not all([isinstance(i, int) for i in stock_price]):
raise ValueError("All values must be integers")
s = Stack(len(stock_price) + 1)
s.push(0)
span = [0] * len(stock_price)
for idx, i in enumerate(stock_price):
while not s.empty() and stock_price[s.top.value] <= i:
v = s.pop()
if (s.empty()):
span[idx] = idx + 1
else:
span[idx] = idx - s.top.value
s.push(idx)
return span
def test_push(self):
s = Stack()
s.push(1)
self.assertEqual(s.top['value'], 1, 'should have inserted 1')
self.assertIsNone(s.top['prev'], 'should have nothing before')
s.push(2)
self.assertEqual(s.top['value'], 2, 'should have 2 as top')
self.assertEqual(s.top['prev']['value'], 1, 'should have 1 before')
self.assertIsNone(s.top['prev']['prev'], '1 is the last value')
def calculate(self, expr):
result = Stack()
elements = self.expr_to_stack(expr)
while elements.size() > 0:
element = elements.pop()
# If passed operator "=", then we return value from result buffer
if element == '=':
return result.pop()
# If passed number, then add it to result buffer
if isinstance(element, int):
result.push(element)
# If passed another operator, then calculate
if element in self.allowed_operators: # If size >= 2
y = result.pop()
x = result.pop()
value = self.allowed_operators[element](
x, y) # Pass params in reverted direction
result.push(value)
return result.pop()
def main():
template = json.dumps(Stack().template_to_json())
params = {'StackName': stack_name, 'TemplateBody': template}
try:
cf.validate_template(TemplateBody=template)
if _stack_exists(stack_name):
print('Updating {}'.format(stack_name))
cf.update_stack(**params)
waiter = cf.get_waiter('stack_update_complete')
else:
print('Creating {}'.format(stack_name))
cf.create_stack(**params)
waiter = cf.get_waiter('stack_create_complete')
print("...waiting for stack to be ready...")
waiter.wait(StackName=stack_name)
except botocore.exceptions.ClientError as ex:
error_message = ex.response['Error']['Message']
if error_message == 'No updates are to be performed.':
print("No changes")
else:
raise
def proper_parens(str):
"""Return 0 if string of parens is balanced, 1 if open and -1 if broken."""
stack = Stack()
for i in str:
if i is '(':
stack.push(i)
print('data', stack._container.head.data)
elif i is ')':
try:
stack.pop()
except IndexError:
return -1
if stack._container.head:
return 1
return 0
def filter_tokens(self):
"""
Requests tokens from the lexer and adds INDENT and DEDENT
to the stream where relevant.
:return: filtered token
:raise: VykingIndentationError
"""
# Vyking has 3 indentation states.
# - no colon hence no need to indent
# - COLON was read, next rule must be a single line statement
# or a block statement
# - NEWLINE was read after a colon, user must indent
BOF = 0 # Beginnig of file
NO_INDENT = 1
MAY_INDENT = 2 # COLON was read
MUST_INDENT = 3 # COLON and NEWLINE were read
# Stack storing indentation levels met
levels = Stack()
levels.push(0)
state = BOF
# helper function
def need_DEDENT(token):
"""Returns True if DEDENT is needed"""
if token.value > levels.read():
raise VykingIndentationError(
token.lineno,
"indentation level is too high.\n"
" \tHint: check for missing colon or mismatch in indentation level.",
)
else:
return token.value < levels.read()
for token in self.lexer:
# ignore NEWLINEs at beginning of input
if state == BOF:
if token.type == "NEWLINE":
continue
else:
state = NO_INDENT
if state == NO_INDENT:
if token.type == "COLON":
state = MAY_INDENT
yield token
elif token.type == "WS":
while need_DEDENT(token):
levels.pop()
yield self._DEDENT(token.lineno - 1)
else:
yield token
elif state == MAY_INDENT:
if token.type == "NEWLINE":
state = MUST_INDENT
else:
state = NO_INDENT
yield token
else: # MUST_INDENT
if token.type == "WS" and token.value > levels.read():
# Store new indentation level
levels.push(token.value)
state = NO_INDENT
yield self._INDENT(token.lineno)
else:
raise VykingIndentationError(token.lineno, "Expected indentation")
# Yield DEDENTs at end of input
while levels.pop() != 0:
yield self._DEDENT(self.get_lineno())
yield self._new_token("ENDMARKER", self.get_lineno())
yield None
def test_len(self):
s = Stack()
self.assertEqual(len(s), 0, 'no elements yet')
s.push(1)
self.assertEqual(len(s), 1, 'one element')
s.push(2)
self.assertEqual(len(s), 2, 'two elements')
s.pop()
self.assertEqual(len(s), 1, 'one element left')
s.pop()
self.assertEqual(len(s), 0, 'no elements left')
s.pop()
self.assertEqual(len(s), 0, 'still no elements left')
def __validateStack(self, stack: st.Stack):
stackLen = len(stack.getStack())
if stackLen < self.consume:
raise ExceptionalHalt("Stackunderflow: %d != %d" % (stackLen, self.consume))
def pushFunc(opcode: Opcode, bytecode: bc.Bytecode, stack: st.Stack):
toPush = bytecode.read(opcode.getShift())
if len(toPush) == 0:
raise ExceptionalHalt("No values to push in bytecode sequence")
stack.push(toPush)
