def matcher(line):
left = "({["
right = "]})"
square = "[]"
curl = "{}"
roun = "()"
s = Stack()
for char in line:
try:
if char in left:
s.push(char)
elif char in right and s.top() in square and char in square:
s.pop()
elif char in right and s.top() in curl and char in curl:
s.pop()
elif char in right and s.top() in roun and char in roun:
s.pop()
except IndexError:
return False
return s.is_empty()
def matcher(l):
s = Stack()
for c in l:
if c in lefties:
s.push(c)
try:
if c in righties and s.top() == dictr[c]:
s.pop()
except IndexError:
return False
if s.is_empty():
return True
return False
def matcher(s):
stack = Stack()
for e in s:
if e in lefties:
stack.push(e)
try:
if e in righties and stack.top() == mapping[e]:
stack.pop()
except IndexError:
return False
if stack.is_empty():
return True
return False
def matcher(line):
d = {')': '(', '}': '{', ']': '['}
s = Stack()
for c in line:
if c in d.values():
s.push(c)
elif c in d.keys():
if s.is_empty():
return False
if s.top() != d[c]:
return False
s.pop()
return s.is_empty()
def matcher(l):
if len(l) % 2 == 1:
return False
l = list(l)
l.sort()
l = "".join(l)
lefts = "{[("
rights = "}])"
s = Stack()
i = 0
while i < len(l):
if l[i] in lefts:
s.push(l[i])
elif l[i] in rights and len(s.l) > 0:
s.pop()
i += 1
return s.is_empty()
def matcher(line):
s = Stack()
lefties = '({['
righties = ')}]'
brackets = ['()', '{}', '[]']
line = line.strip()
try:
for pattern in line:
if pattern in lefties:
s.push(pattern)
else:
if s.top() + pattern in brackets:
s.pop()
return s.is_empty()
except:
return False
def matcher(line):
s = Stack()
left = '({['
right = ')}]'
brackets = ['()', '{}', '[]']
line = line.strip()
try:
for ch in line:
if ch in left:
s.push(ch)
else:
if s.top() + ch in brackets:
s.pop()
return s.is_empty()
except:
return False
def matcher(line):
s = Stack()
for char in line:
if char == "(" or char == "{" or char == "[":
s.push(char)
elif char == ")" or char == "}" or char == "]":
try:
if not s.is_empty:
return False
elif char == ")" and s.top() == "(":
s.pop()
elif char == "}" and s.top() == "{":
s.pop()
elif char == "]" and s.top() == "[":
s.pop()
else:
return False
except:
return False
return s.is_empty()
def main():
s = Stack()
print(len(s))
s.push(1)
print(s.top())
print(s.is_empty())
print(s.pop())
print(s.is_empty())
try:
print(s.pop())
except IndexError:
print('Error')
try:
print(s.top())
except IndexError:
print('Error')
s.push(1)
s.push(2)
s.push(3)
print(len(s))
print(s.pop())
print(s.pop())
print(s.pop())
print(s.is_empty())
def calculator(l):
s = Stack()
for i in l.split():
if i in binops.keys():
y = s.pop()
x = s.pop()
s.push(binops[i](x, y))
elif i in uniops.keys():
s.push(uniops[i](s.pop()))
else:
s.push(float(i))
return s.top()
def calculator(line):
stack = Stack()
for e in line.split():
if e in binops.keys():
y = stack.pop()
x = stack.pop()
stack.push(binops[e](x, y))
elif e in uniops.keys():
stack.push(uniops[e](stack.pop()))
else:
stack.push(float(e))
return stack.top()
def calculator(s):
stack, q = Stack(), Queue()
s = s.split()
i = 0
while i < len(s) and ifl(s[i]):
stack.push(float(s[i]))
i += 1
for c in s[i:]:
q.enqueue(c)
while len(q) > 0:
calc, n1 = q.dequeue(), stack.pop()
if calc == 'r': stack.push(n1**(1 / 2))
elif calc.isalpha(): stack.push(n1 * -1)
else: stack.push(eval(str(stack.pop()) + calc + str(n1)))
return stack.pop()
def calculator(line):
changers_b = {
'+': lambda a, b: a + b,
'-': lambda a, b: a - b,
'*': lambda a, b: a * b,
'/': lambda a, b: a / b,
'%': lambda a, b: a % b,
'**': lambda a, b: a**b
}
changers_u = {
'n': lambda a: -a,
's': lambda a: a * a,
'r': lambda a: math.sqrt(a),
'l': lambda a: math.log(a)
}
stack = Stack()
line = line.strip().split()
for i in range(0, len(line)):
if line[i] in changers_b:
try:
one = float(stack.pop())
two = float(stack.pop())
stack.push(changers_b[line[i]](two, one))
except (ValueError, IndexError):
break
elif line[i] in changers_u:
try:
one = float(stack.pop())
stack.push(changers_u[line[i]](one))
except ValueError:
break
elif line[i].split('.')[0].isdigit():
stack.push(line[i])
if len(stack) == 1:
return float(stack.l[0])
else:
raise IndexError("What's up bro?")
def calculator(line):
chars = line.split()
s = Stack()
for c in chars:
if is_num(c):
s.push(float(c))
elif c in un:
s.push(float(uniops[c](s.pop())))
elif c in binops:
b = s.pop()
s.push(float(binops[c](s.pop(), b)))
return s.top()
def calculator(line):
s = Stack()
normalop = ["+", "-", "*", "/"]
specialop = ["r", "n"]
l = line.split()
for char in l:
if char not in normalop and char not in specialop:
s.push(char)
elif char in normalop:
p1 = float(s.pop())
p2 = float(s.pop())
s.push(normal(char, p1, p2))
elif char in specialop:
p = float(s.pop())
s.push(special(char, p))
return float(s.top())
def calculator(line):
def plus(a, b):
return a + b
def subtract(a, b):
return a - b
def product(a, b):
return a * b
def divide(a, b):
return a / b
def remainder(a, b):
return a % b
def power(a, b):
return a**b
def neg(a):
return -a
def square(a):
return a**2
def sqrt(a):
return math.sqrt(a)
def log(a):
return math.log(a)
binops = {
'+': plus,
'-': subtract,
'*': product,
'/': divide,
'%': remainder,
'**': power,
}
uniops = {
'n': neg,
's': square,
'r': sqrt,
'l': log,
}
s = Stack()
for n in line.split():
if n.replace('.', '').isdigit():
s.push(float(n))
elif n in binops:
b = s.pop()
a = s.pop()
c = float(binops[n](a, b))
s.push(c)
elif n in uniops:
a = s.pop()
b = uniops[n](a)
s.push(b)
return s.top()
def calculator(line):
items = line.split()
nums = Stack()
for k in items:
if k.isdecimal() or "." in k:
nums.push(float(k))
elif k == "*":
fin = nums.l[-2] * nums.l[-1]
nums.pop()
nums.pop()
nums.push(fin)
elif k == "+":
fin = nums.l[-2] + nums.l[-1]
nums.pop()
nums.pop()
nums.push(fin)
elif k == "-":
fin = nums.l[-2] - nums.l[-1]
nums.pop()
nums.pop()
nums.push(fin)
elif k == "/":
fin = nums.l[-2] / nums.l[-1]
nums.pop()
nums.pop()
nums.push(fin)
elif k == "r":
fin = sqrt(nums.l[-1])
nums.pop()
nums.push(fin)
elif k == "n":
fin = -nums.l[-1]
nums.pop()
nums.push(fin)
return nums.l[0]
def calculator(line):
line = line.strip().split()
op = ["+", "-", "/", "r", "n", "*"]
if len(line) == 1:
return float(line[0])
stack = Stack()
operation = []
for b in line:
num = 0
if set(b).issubset(("0123456789.")):
stack.push(float(b))
else:
operation.append(b)
i = 0
while i < len(operation):
if operation[i] == "+":
s = stack.pop()
t = stack.pop()
stack.push((s + t))
elif operation[i] == "-":
s = stack.pop()
t = stack.pop()
stack.push((t - s))
elif operation[i] == "/":
s = stack.pop()
t = stack.pop()
stack.push((t / s))
elif operation[i] == "n":
s = stack.pop()
stack.push(-1 * s)
elif operation[i] == "r":
s = stack.pop()
stack.push(sqrt(s))
elif operation[i] == "*":
s = stack.pop()
t = stack.pop()
stack.push((s * t))
i += 1
return stack.pop()