potential fix for scope, 27.02

from functools import reduce
#'(+ 1 2 (+ 2 3))'  -> ['+', 1, 2, ['+', 2, 3]]
#              parsing



#'(car (quote       (+ 42 13)))' -> ['(','car','(','quote','(','+','42','13',')',')',')']

class LispInterException(ValueError):pass

def tokenize(line):
    word_holder = ''
    tokens = []
    for i in line:
        if i == '(' or i == ')':
            if word_holder == '':
                tokens.append(i)
            else:
                tokens.append(word_holder)
                word_holder = ''
                tokens.append(i)
        elif i == ' ':
             if word_holder != '':
                tokens.append(word_holder)
                word_holder = ''
        else:
            word_holder += i
    if word_holder != '':
        tokens.append(word_holder)
    return tokens


#tokens: '(','42','(','13',')','666',')'
#stack: '(','42',['13']

def parse(array):             #via stack
    stack = []
    for i in array:
        if i != ')':
            if i.isdigit():
                stack.append(int(i))
            else:
                stack.append(i)
        else:
            resulting_list = []
            while stack and stack[-1] != '(':
                resulting_list.append(stack.pop())
            if stack:
                stack.pop()
            else:
                raise LispInterException("Exception: Missing opening skobochka")
            stack.append(resulting_list[::-1])
    return stack.pop()


def to_str(final_list, count, result): #making result look like lisp code
    print(final_list)
    if count == len(final_list):
        return result[:-1] + ') '
    else:
        if final_list[count] == '\'' or final_list[count] == ',':
            return to_str(final_list, count + 1, result)
        elif type(final_list[count]) == list:
            return to_str(final_list, count + 1, result + to_str(final_list[count], 0, '('))
        elif type(final_list[count]) == int:
            return to_str(final_list, count + 1, result + str(final_list[count]) + ' ')
        else:
            return to_str(final_list, count + 1, result + final_list[count] + ' ')

global_d = {}
local_d = {}

def tracing(function):
    def traced_function(*args):
        print(function.__name__, ' '.join(str(i) for i in args))
        result = function(*args)
        print('result for function ', function.__name__, ' '.join(str(i) for i in args), ' is ', result)
        return result
    return traced_function

@tracing
def my_apply(procedure, arguments, global_d, local_d):
    if procedure == '+':  #plus
        #print('summ func')
        if not all(isinstance(x, int) for x in arguments):
            raise LispInterException("Exception: you can only use 'Summ' with int elements")
        return reduce(lambda x,y: x + y, arguments, 0)

    elif procedure == '-': #minus
        #print('minus func')
        if not all(isinstance(x, int) for x in arguments):
            raise LispInterException("Exception: you can only use 'Minus' with int elements")
        if len(arguments) == 1: #Lisp returns -x if it's (- x)
            return arguments[0] * -1
        else:
            return reduce(lambda x,y: x - y, arguments)

    elif procedure == '*': #multiply
        #print('multiply func')
        if not all(isinstance(x, int) for x in arguments):
            raise LispInterException("Exception: you can only use 'Multiply' with int elements")
        return reduce(lambda x,y: x * y, arguments, 1)

    elif procedure == '/': #divide
        #print('divide func')
        if not all(isinstance(x, int) for x in arguments):
            raise LispInterException("Exception: you can only use 'Divide' with int elements")
        if len(procedure) == 1:
            return 'Error: You can\'t call eval for the empty division symbol'
        else:
            return reduce(lambda x,y: x / y, arguments)

    elif procedure == 'null': #null
        #print('null func')
        if not len(arguments) == 1:
            raise LispInterException("Exception: you can only use 'Null' with single argument")
        if type(arguments) == list and not arguments:
            return '#t'
        else:
            return '#f'

    elif procedure == '=': #equal
        #print('equal func')
        if not all(isinstance(x, int) for x in arguments):
            raise LispInterException("Exception: you can only use 'Equal' with int elements")
        for i in range(len(arguments) - 1):
            if arguments[i] != arguments[i + 1]:
                return '#f'
        return '#t'

    elif procedure == '/=': #not equal
        #print('not equal func')
        if not all(isinstance(x, int) for x in arguments):
            raise LispInterException("Exception: you can only use 'Not equal' with int elements")
        for i in range(len(arguments) - 1):
            if arguments[i] == arguments[i + 1]:
                return '#f'
        return '#t'

    elif procedure == '>': #more than
        #print('more than func')
        if not all(isinstance(x, int) for x in arguments):
            raise LispInterException("Exception: you can only use 'More than' with int elements")
        if not all(isinstance(x, int) for x in arguments):
            raise LispInterException("Exception: not int value in 'More than' function")
        for i in range(len(arguments) - 1):
            if not arguments[i] > arguments[i + 1]:
                return '#f'
        return '#t'

    elif procedure == '<': #less than
        #print('less than func')
        if not all(isinstance(x, int) for x in arguments):
            raise LispInterException("Exception: you can only use 'Less than' with int elements")
        if not all(isinstance(x, int) for x in arguments):
            raise LispInterException("Exception: not int value in 'Less than' function")
        for i in range(len(arguments) - 1):
            if not arguments[i] < arguments[i + 1]:
                return '#f'
        return '#t'

    elif procedure == '>=': #more or equal than
        #print('more or equal than func')
        if not all(isinstance(x, int) for x in arguments):
            raise LispInterException("Exception: you can only use 'More or equal than' with int elements")
        if not all(isinstance(x, int) for x in arguments):
            raise LispInterException("Exception: not int value in 'Equal or more than' function")
        if arguments[0] >= arguments[1]:
            return '#t'
        else:
            return '#f'

    elif procedure == '<=': #less or equal than
        #print('less or equal func')
        if not all(isinstance(x, int) for x in arguments):
            raise LispInterException("Exception: you can only use 'Less or equal than' with int elements")
        if not all(isinstance(x, int) for x in arguments):
            raise LispInterException("Exception: not int value in 'Equal or less than' function")
        if arguments[0] <= arguments[1]:
            return '#t'
        else:
            return '#f'

    elif procedure == 'cons':  #car + cdr (cons 1 2) -> '(1.2) | (cons 1 '(b c d)) -> '(1 b c d)
        #print('cons func')
        if len(arguments) != 2:
            raise LispInterException("Exception: wrong amount of arguments in 'cons' function")
        a = arguments[0]
        b = arguments[1]
        if type(b) != list:
            raise LispInterException("Exception: this intepreter can't handle pairs")
        else:
            return [a] + b

    elif procedure == 'list': #Creating lists
        #print('list func')
        return arguments

    elif procedure == 'car': #head of list
        #print('car func')
        return arguments[0][0]

    elif procedure == 'cdr': #list without head
        #print('cdr func')
        return arguments[0][1:]

    elif type(procedure) == list and procedure[0] == 'lambda': #making lambda expression ((lambda (params) (body)) params-value)
        #print('lambda func')
        local_d = procedure[3]
        actuals = [i for i in arguments]
        for i,j in enumerate(procedure[1]):
            local_d[j] = actuals[i]
        return (my_eval(procedure[2], global_d, local_d))

    else:
        raise LispInterException('Exception: you gave some bullshit to the interperter')

inbuilt_functions = ['+', '-', '*', '/', 'null', '=', '/=', '>', '<', '>=', '<=', 'cons', 'list', 'car', 'cdr', 'lambda']

@tracing
def my_eval(expr, global_d, local_d):
    if type(expr) == int: #displaying int number
        #print('displaying int')
        return expr

    elif expr == 'pseudoclear': #kinda clearing the terminal
        for i in range(50):
            print()
        return ''

    elif expr == '#t' or expr == '#f': #displaying true/false
        #print('displaying bool')
        return expr

    elif expr == 'global': #displaying global dict
        return global_d

    elif expr == 'clear-global': #Clearing global dict
        global_d.clear()
        return 'global dictionary is cleared'

    elif expr == 'exit': #exit key
        exit('Exiting terminal')

    elif type(expr) == str: #Calling variable
        #print('looking for variable')
        if expr in local_d:
            return local_d[expr]
        elif expr in global_d:
            return global_d[expr]
        else:
            if expr in inbuilt_functions:
                return expr
            else:
                raise LispInterException('Exception: variable not defined')

    elif type(expr) == list and expr[0] == 'if': #if function
        #print('if func')
        if my_eval(expr[1], global_d, local_d) == '#t':
            return my_eval(expr[2], global_d, local_d)
        else:
            return my_eval(expr[3], global_d, local_d)

    elif type(expr) == list and expr[0] == 'quote': #quoting expression into list
        #print('quote  func')
        if len(expr) != 2:
            raise LispInterException('Exception: \'quote\' function can only work with 1 argument')
        return expr[1]

    elif type(expr) == list and expr[0] == 'let': #local namespace parallel (let ((var1 value1) (var2 value2)) body)
        #print('let func')
        local_d_new = local_d.copy() #переносим все предыдущие значения в новый дикт, так как надо изолировать дикт в параметрах подаваемый на данный шаг рекурсии и подаваемый на следующий шаг рекурсии
        for i in expr[1]: #Заполнение словаря новыми переменными из текущей итерации рекурсии
            local_d_new[i[0]] = my_eval(i[1], global_d, local_d)
        return my_eval(expr[2], global_d, local_d_new)

    elif type(expr) == list and expr[0] == 'let*': #local namespace one after another (let* ((var1 value1) (var2 value2)) body)
        #print('*let func')
        for i in expr[1]: #Создание новой копии словаря после каждого добавления переменной, чтобы в последующих шагах, если использовалась перезаданная переменная из прошлого шага, было использовано новое значение
            local_d = local_d.copy()
            local_d[i[0]] = my_eval(i[1], global_d, local_d)
        return my_eval(expr[2], global_d, local_d)

    elif type(expr) == list and expr[0] == 'lambda': #если подается (lambda (x) x)
        #print('single lambda func')
        expr = expr + [local_d]
        return expr

    elif type(expr) == list and expr[0] == 'define':
        #print('define func')
        if type(expr[1]) == str: #для присваивания атому
            global_d[expr[1]] = my_eval(expr[2], global_d, local_d)
            return 'defined a variable'
        else: #Для присваивания функции
            if not all(isinstance(n, str) for n in expr[1]):
                raise LispInterException('Exception: define - not an identifier, identifier with default, or keyword for procedure argument')
            else:
                global_d[expr[1][0]] = ['lambda', expr[1][1:], expr[2], local_d]
                return 'defined a function'

    else:
        return my_apply(my_eval(expr[0], global_d, local_d), [my_eval(i, global_d, local_d) for i in expr[1:]], global_d, local_d)
#


#Прогнать парсинг с отладочной печатью
#Написать функцию самостоятельно перегона из стринга в инт, из инта в стринг
#Доделать всю арифметику, а также car cdr quote cons if

# REPL = Read Eval Print Loop

def repl():
    #global_d = {}
    while True:
        expr = input("MICRO-LISP: ")
        try:
            result = (my_eval(parse(tokenize(expr)), global_d, {}))
            if type(result) == int or type(result) == str or type(result) == dict:
                print(result)
            else:
                print(to_str(result, 0, '(')[:-1])
        except LispInterException as e:
            print (e)

repl()

#Добавить в необходимые места ексепшены (например, не хватает открывающейся скобки)
#Сделать Define
#Реализовать специальную конструкцию If, чтобы експрешион ((if (= 1 1) (lambda (x) (+ 1 x)) (lambda (y) (+ 2 y))) 42)   выполнялся (прописать myeval...)
#Реализовать интерпретатор без рекурсии