def isBalanced(file):
    with open(file) as f:
        strInput = f.read()
        if strInput:
            brackets = [ ('(',')'), ('[',']'), ('{','}')]
            kStart = 0
            kEnd = 1
 
            stack = []
 
            for char in strInput:
                for bracketPair in brackets:
                    if char == bracketPair[kStart]:
                        stack.append(char)
                    elif char == bracketPair[kEnd] and len(stack) > 0 and stack.pop() != bracketPair[kStart]:
                        return False
 
            if len(stack) == 0:
                return True
 
        return False

 def line_col(symbol,file):
    with open(file) as myFile:
        for num, line in enumerate(myFile, 1):
            if symbol in line:
                idx = line.index(symbol)
                print ('symbol at line:', num,'symol at column:', idx)

  
brackets = ('()', '[]', '{}')

  
    if not stack:
        return True