54 lines
1.6 KiB
Python
54 lines
1.6 KiB
Python
from zzcore import StdAns
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class Ans(StdAns):
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def GETMSG(self):
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if len(self.parms) < 2:
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return '不加参数是坏文明！'
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try:
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msg = str(bc(self.raw_msg['raw_message'][5:]))
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except Exception as e:
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msg = str(e)
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return msg
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def bc(formula):
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formula = pure(formula)
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try:
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return float(formula)
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except ValueError:
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print(subFormula(formula))
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subLift,subRight,flag = subFormula(formula)
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return cal(bc(subLift),bc(subRight),flag)
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def pure(formula):
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while(formula[0] == '(' or (formula[0] == '-' and formula[1] == '-')):
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if formula[0] == '(':
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formula = formula[1:]
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else:
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formula = formula[2:]
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while(formula[len(formula) - 1] == ')'):
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formula = formula[:len(formula) - 1]
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return formula
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def subFormula(formula):
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start = 0
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if formula[0]=='-':
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start = 1
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for index in range(start,len(formula)):
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if formula[index] in ['*','/']:
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lastxx = index
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elif formula[index] == '+':
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return formula[:index],formula[index+1:],'+'
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elif formula[index] == '-' and formula[index-1] not in ['*','/']:
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return formula[:index],formula[index:],'+'
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elif formula[index] == '(':
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return formula[:index-1],formula[index:],formula[index-1]
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return formula[:lastxx],formula[lastxx+1:],formula[lastxx]
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def cal(f1,f2,flag):
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do = {
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'+':lambda x,y: x+y,
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'*':lambda x,y: x*y,
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'/':lambda x,y: x/y
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}
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return do[flag](f1,f2)
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