check.py

import sys

filename = sys.argv[1]
file = open(filename)
code = file.read()
file.close()

class compoundst:
  def __init__(self,code,sttable):
    self.sts=code.split('\n')
  
    i=0
    while(i<len(self.sts)):
    
      if(':=' in self.sts[i]):
        self.assignst=Assignmentst(self.sts[i][:-1])
        self.assignst.eval(sttable)
      
      elif('if' in self.sts[i]):
        self.ifst=Ifst(self.sts,i)
        self.ifst.eval(sttable)
        i=self.sts.index('fi;')
                
        
      elif('print' in self.sts[i]):
        self.printst=Printst(self.sts[i][:-1])
        self.printst.eval(sttable)
              
      #elif('while' in self.sts[i]):
        #self.whilest=Whilest(self.sts[i])
      
      #elif('done' in self.sts[i]):
        #self.donest=Donest(self.sts[i])
      
      i=i+1;       
     
class program:
  def __init__(self,code,sttable):
    self.comst=compoundst(code,sttable)


class Constant:
  
  def eval(text):
    if(text.isalnum()):
      return int(text)
    else:
      return float(text)

class Var:
  def eval(text,sttable):
    if(text in sttable):
      return sttable[text]

class Expression(Constant):
  def eval(text,sttable):
    
    if(text.isalpha()):
      return Var.eval(text,sttable)
    elif(text.isnumeric()):
      return Constant.eval(text)
    elif('+' in text):
      return Plus.eval(text,sttable)
    elif('-' in text):
      return Minus.eval(text,sttable)
    elif('*' in text):
      return Multiply.eval(text,sttable)
    elif('>' in text):
      return Greater.eval(text,sttable)
    elif('<' in text):
      return Less.eval(text,sttable)
    elif('>=' in text):
      return Greaterequal.eval(text,sttable)
    elif('<=' in text):
      return Lessequal.eval(text,sttable)
    elif('!=' in text):
      return Notequal.eval(text,sttable)
    elif('=' in text):
      return Equal.eval(text,sttable)
    
class Greater(Expression):
  def eval(text,sttable):
    return(Expression.eval(text.split('>')[0],sttable)>Expression.eval(text.split('>')[1],sttable))
    
class Less(Expression):
  def eval(text,sttable):
    return(Expression.eval(text.split('<')[0],sttable)<Expression.eval(text.split('<')[1],sttable))

class Greaterequal(Expression):
  def eval(text,sttable):
    return(Expression.eval(text.split('>=')[0],sttable)>=Expression.eval(text.split('>=')[1],sttable))

class Lessequal(Expression):
  def eval(text,sttable):
    return(Expression.eval(text.split('<=')[0],sttable)<=Expression.eval(text.split('<=')[1],sttable))

class Notequal(Expression):
  def eval(text,sttable):
    return(Expression.eval(text.split('!=')[0],sttable)!=Expression.eval(text.split('!=')[1],sttable))

class Equal(Expression):
  def eval(text,sttable):
    return(Expression.eval(text.split('=')[0],sttable) is Expression.eval(text.split('=')[1],sttable))

class Plus(Expression):
  def eval(text,sttable):
    return(Expression.eval(text.split('+')[0],sttable)+Expression.eval(text.split('+')[1],sttable))
    
class Minus(Expression):
  def eval(text,sttable):
    return(Expression.eval(text.split('-')[0],sttable)-Expression.eval(text.split('-')[1],sttable))

class Multiply(Expression):
  def eval(text,sttable):
    return(Expression.eval(text.split('*')[0],sttable)*Expression.eval(text.split('*')[1],sttable))
    

class Printst:
  def __init__(self,text):
    self.pr=text[text.find('(')+1:text.find(')')]
  
  def eval(self,sttable):
    if('"' in self.pr):
      print(self.pr[1:len(self.pr)-1])
    else:
      print(sttable[self.pr])


class Ifst:
  def __init__(self,text,i):
    self.condst=text[i][text[i].find('(')+1:text[i].find(')')]
    self.text=text
    self.i=i  
  def eval(self,sttable):
    self.res=Expression.eval(self.condst,sttable)
    if(self.res):
      list1=self.text[self.i+1:self.text.index('else')]
      i=0
      while(i<len(list1)):
    
        if(':=' in list1[i]):
          self.assignst=Assignmentst(list1[i][:-1])
          self.assignst.eval(sttable)
      
        elif('if' in list1[i]):
          self.ifst=Ifst(list1,i)
          self.ifst.eval(sttable)
          i=list.index('fi;')
                
        
        elif('print' in list1[i]):
          self.printst=Printst(list1[i][:-1])
          self.printst.eval(sttable)
              
        #elif('while' in self.sts[i]):
          #self.whilest=Whilest(self.sts[i])
      
        #elif('done' in self.sts[i]):
          #self.donest=Donest(self.sts[i])    
      
        i=i+1
        
    if(not self.res):

      list1=self.text[self.text.index('else')+1:self.text.index('fi;')]      
      i=0
      while(i<len(list1)):
        
        if(':=' in list1[i]):
          self.assignst=Assignmentst(list1[i][:-1])
          self.assignst.eval(sttable)
      
        elif('if' in list1[i]):
          self.ifst=Ifst(list1,i)
          self.ifst.eval(sttable)
          i=list1.index('fi;')
                
        elif('print' in list1[i]):
          self.printst=Printst(list1[i][:-1])
          self.printst.eval(sttable)
              
      #elif('while' in self.sts[i]):
        #self.whilest=Whilest(self.sts[i])
      
      #elif('done' in self.sts[i]):
        #self.donest=Donest(self.sts[i])    

        i=i+1
class Assignmentst:
  def __init__(self,text):
    self.left=text.split(':=')[0]
    self.right=text.split(':=')[1]
      
  def eval(self,sttable):
    
    self.exp=Expression.eval(self.right,sttable)
    sttable[self.left]=self.exp
               

sttable={}
p=program(code,sttable)
#print(code)
print(sttable)