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convert.py
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convert.py
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from exceptions import InputError
from soperator import SOperator
from stack import Stack
from utils import _debug, possible
F = SOperator.FUNCTIONS
def convert(debug=False, squish=False):
s1 = Stack()
s2 = Stack()
i = input()
n = ''
isnum = False
haspoint = False
for c in i:
if c.isdigit():
if n and not isnum:
if possible(F, n) != 2:
if n == '(':
s1.push('(')
elif n == ')':
while s1.top() != '(':
s2.push(s1.pop())
s1.pop()
else:
raise InputError
while not (s1.empty() or s1.top() == '(' or F[s1.top()][2] <= F[n][2]):
if debug:
_debug('S12 "?" !num', s1.top())
s2.push(s1.pop())
s1.push(n)
n = ''
isnum = True
n += c
elif c == '.':
if not isnum:
raise InputError('Decimal point on non-number')
if haspoint:
raise InputError('A number has multiple decimal points')
n += '.'
haspoint = True
elif c == ' ':
if n:
if isnum:
if debug:
_debug('PUT " " num', n)
s2.push(int(n) if n.isdigit() else float(n))
else:
if debug:
_debug('PUT " " !num', n)
if possible(F, n) != 2:
if n == '(':
s1.push('(')
elif n == ')':
while s1.top() != '(':
s2.push(s1.pop())
s1.pop()
else:
raise InputError
while not (s1.empty() or s1.top() == '(' or F[s1.top()][2] <= F[n][2]):
if debug:
_debug('S12 " " !num', s1.top())
s2.push(s1.pop())
s1.push(n)
n = ''
isnum = False
haspoint = False
else:
if isnum:
if debug:
_debug('PUT "*" num', n)
s2.put(int(n) if n.isdigit() else float(n))
n = ''
isnum = False
haspoint = False
p = possible(F, n + c)
if p == 2:
if debug:
_debug('PUT "*" !num', n + c)
while not (s1.empty() or s1.top() == '(' or F[s1.top()][2] <= F[n + c][2]):
if debug:
_debug('S12 "*" !num', s1.top())
s2.push(s1.pop())
s1.push(n + c)
n = ''
elif p == 1:
n += c
else:
if c == '(':
s1.push('(')
elif c == ')':
while s1.top() != '(':
s2.push(s1.pop())
s1.pop()
else:
p = possible(F, n)
if p == 2:
if debug:
_debug('PUT', n)
while not (s1.empty() or s1.top() == '(' or F[s1.top()][2] <= F[n][2]):
if debug:
_debug('S12', s1.top())
s2.push(s1.pop())
s1.push(n)
n = c
elif p == 0:
raise RuntimeError('???!')
if n:
if isnum:
if debug:
_debug('PUT "n" num', n)
s2.push(int(n) if n.isdigit() else float(n))
else:
if debug:
_debug('PUT "n" !num', n)
while not (s1.empty() or s1.top() == '(' or F[s1.top()][2] <= F[n + c][2]):
if debug:
_debug('S12 "*" !num', s1.top())
s2.push(s1.pop())
s1.push(n)
while not s1.empty():
s2.push(s1.pop())
if debug:
_debug(s2)
if not squish:
return ' '.join((str(x) for x in s2.s))