❕NEWS – Maker Of Zcash Launches Educational Program For Crypto | NewProxyLists

The maker of Zcash Electric Coin Company launched a new educational training called “Crypto in Context” which will teach people about cryptocurrency. Popular exchanges like Gemini and Binance are also participating. Crypto in Context is also looking forward to hosting educational events around the world. They are planning to offer crypto lessons to the poor and needy.

seo – Are people searching for educational resources online likely to use just the name of the subject as their query?

People willing to learn physics might search for something like “physics books”, “physics courses”, “high school physics”, “guide to learning physics”, and similar queries. But what I find interesting is that even the combined search volume of all of these queries much lower than that of “physics” alone.

For instance, look at this data: https://trends.google.com/trends/explore?q=physics,physics%20books,learn%20physics,physics%20for%20beginners,physics%20basics

I tried it out with almost a hundred queries (derived from Google’s “searches related to (your query)” section at the bottom of the page), and still, the combined search volume would only add up to less than 20 units on Google Trends relative to 72 units for “chemistry”.

I guess if there are about 500 frequently used queries (say the ones searched for more than once a week), applying the Pareto principle, the combined search volume would be no more than 30 relative units against “physics”.

What do you think?

Proper Educational Facilitates – General Forex Questions & Help

If you want to become successful in the forex market, you need to be perfect on your strategy and planning. Wrong strategy can put you in danger. To make a profitable strategy, you need to have knowledge about forex market. Education is the main key to success in this platform. If you want to get all kind of education about forex you can open a demo account.

I also opened a demo account in Forex4you when i was starting trading. This demo helps me to understand all the tools and techniques about forex easily and practically. It also helps me to know all the basics of the forex market.

beginner – Educational project in python. Code cleanliness and OOP implementation

The code passed the tests, but the state processing turned out to be very noodle-like. I would be grateful for advice on improving the code architecture. Source on github

from string import ascii_letters
from collections import deque

class SyntacticalAnalyzer:
    The name of a variable (identifier) can contain only Latin letters.
A variable can have a name consisting of more than one letter.
The case is also important; for example, n is not the same as N.
The value can be an integer number or a value of another variable.
Addition and subtraction operations are allowed.
Commands begin with a slash and can be: /exit and /help
    _digits_tags: str = '1234567890'
    _commands = ('/exit', "https://codereview.stackexchange.com/help")
    left_part: str = None
    expression_stack: list = ()
    operator_priority: dict = {
        '(': 0,
        '+': 2,
        '-': 2,
        '*': 3,
        "https://codereview.stackexchange.com/": 3,
        '^': 4,
        ')': 0
    rpn_stack: deque = deque()

    def check_ascii(name):
        for letter in name:
            if letter not in ascii_letters:
                return False
        return True

    def checked_string(self) -> str:
        return self.__checked_string

    def checked_string(self, value: str):
        self.__checked_string = value

    def check_result(self):
        return self.res

    def __init__(self):
        self.__checked_string: str = ''
        self._state: str = 'assignment operator'
        # правила обхода цепочки проверок
        self.chain_rules: dict = dict(skip=False,
        # статус проверки
        self._status = dict(checker='',
        # объект, передаваемый в класс-обёртку
        self.res = dict(error=None,
        # список проверочных функций
        self._check_chain: list = (self.check_not_empty,

    def notify(self, checker: str, check_res: bool):
        Передаёт в объект self._status имя функции и результат её работы
        @param checker: имя переданной функции
        @type checker: str
        @param check_res: результат работы переданной функции
        @type check_res: bool
        @return: None
        self._status('checker') = checker
        self._status('check_res') = check_res

    def check_status_handler(self):
        Считывает изменённый объект self._status, устанавливает self._state
        и изменяет объект self.chain_rules
        @return: None

        if self._status('checker') == 'check_not_empty' and not self._status('check_res'):
            self._status('error') = 'empty'
            self._state = 'empty'
        if self._status('checker') == 'check_command_tag':
            if self._status('check_res'):
                self._state = 'command'
                self.chain_rules('skip') = True

        if self._status('checker') == 'check_command_incorrectness':
            if not self._status('check_res'):
                self._status('error') = self.add_command()
                self.chain_rules('off') = True
                self.chain_rules('off') = True
        if self._status('checker') == 'check_equality_tag':
            if not self._status('check_res'):
                self._state = 'expression'
                self.chain_rules('skip') = True

        if self._status('checker') == 'check_left_part':
            if not self._status('check_res'):
                self._status('error') = 'Invalid identifier'

        if self._status('checker') == 'check_right_part':
            if not self._status('check_res'):
                if self._state == 'assignment operator':
                    self._status('error') = 'Invalid assignment'
                    self.chain_rules('skip') = True
                    self._status('error') = 'Invalid identifier'
                    self.chain_rules('skip') = True
        if self._status('checker') == 'to_rpn':
            if not self._status('check_res'):
                if self._state == 'assignment operator':
                    self._status('error') = 'Invalid assignment'
                    self._status('error') = 'Invalid expression'

    def perform_res(self):
        Проверяет self._state и self._status. Заполняет словарь self.res
        @return: None
        self.res('state') = self._state
        if self._state == 'empty':
            self.res('error') = 'empty'
            self.chain_rules('off') = True
        if self._state == 'command':
            if self._status('error') is None:
                self.res('command') = self.add_command()
                self.res('error') = self._status('error')
        if self._state == 'assignment operator':
            if self._status('error') is None:
                self.res('left') = self.left_part
                self.res('rpn_expression') = self.rpn_stack
                self.res('error') = self._status('error')
        if self._state == 'expression':
            if self._status('error') is None:
                self.res('rpn_expression') = self.rpn_stack
                self.res('error') = self._status('error')

    def clear_init_fields(self):
        Очищает все поля конструктора перед проверкой новой строки
        @return: None
        self._state = 'assignment operator'
        self._status('checker') = ''
        self._status('error') = None
        self._status('check_res') = False
        self.chain_rules('skip') = False
        self.chain_rules('off') = False

        for key, value in self.res.items():
            if type(value) != dict:
                self.res(key) = None
        self.expression_stack = ()

    def run_check_chain(self):
        Запускает цепочку проверок строки. Читает объекты self.chain_rules и
        self._status, если свойство skip == True, пропускает следующую проверку,
        если свойство off == True или одна из проверок завершилась
        с ошибкой, завершает свою работу
        @return: None
        j = -1

        for i, check in enumerate(self._check_chain):
            if j == i:
                self.chain_rules('skip') = False
            if self.chain_rules('skip'):
                j = i + 1 if i + 1 < len(self._check_chain) else -1
            if self._status('error') is not None:
            if self.chain_rules('off'):

    def run_check(self, check_func):
        @type check_func: function
        result = check_func()
        self.notify(check_func.__name__, result)

    def check_not_empty(self):
        return self.checked_string != ''

    def check_command_tag(self):
        return self.checked_string.startswith("https://codereview.stackexchange.com/")

    def check_command_incorrectness(self):
        return self.checked_string in self._commands

    def add_command(self) -> str:
        for _command in self._commands:
            if self.checked_string == _command:
                return _command
        return 'Unknown command'

    def check_equality_tag(self) -> bool:
        return '=' in self.checked_string

    def is_variable(self, name: str) -> bool:
        return all((len(name) >= 1, self.check_ascii(name)))

    def check_left_part(self):
        if self._state == 'assignment operator':
            self.left_part = self.checked_string.split('=')(0).strip()
            return self.is_variable(self.left_part)

    def get_fragment_params(value: str, end):
        out_str = ''
        pos = 0
        sym = value(0)
        while sym not in end:
            out_str += sym
                pos += 1
                sym = value(pos)
            except IndexError:
                return out_str, None
        return out_str, pos

    def is_operator(item: str):
        item_list: list = item.strip().split(' ')
        my_str = ''.join(item_list)
        if my_str(0) in '+-':
            for el in my_str:
                if el not in '+-':
                    return False
        if my_str(0) in '/*^':
            if len(my_str) > 1:
                return False
        return True

    def is_digit(item: str):
        if item(0) == '0':
            if len(item) != 1:
                return False
            return True
        for el in item:
            if el not in '1234567890':
                return False
        return True

    def is_left_parenthesis(item: str):
        for el in item:
            if el not in '(':
                return False
        return True

    def is_right_parenthesis(item: str):
        for el in item:
            if el not in ')':
                return False
        return True

    def get_first(value: str):
        return value(0) if value else None

    def get_tag(letter: str):
        if letter in ascii_letters:
            return 'variable'
        if letter in '-+/*^':
            return 'operator'
        if letter in '1234567890':
            return 'digit'
        if letter in '()':
            return 'left parenthesis' if letter == '(' else 'right parenthesis'

    def get_end_tag(tag: str) -> str:
        if tag == 'variable':
            return ' )+-/*^'
        if tag == 'operator':
            return '(0123456789' + ascii_letters
        if tag == 'digit':
            return ' )+-/*^'
        if tag == 'left parenthesis':
            return ' 0123456789' + ascii_letters + '+-'
        if tag == 'right parenthesis':
            return ' +-/*^'

    def transform_operator(el: str):
        if '-' in el or '+' in el:
            minus_cnt = el.count('-')
            if minus_cnt:
                return '-' if minus_cnt % 2 != 0 else '+'
            return '+'
        return el

    def transform_parenthesis(el: str):
        return list(el)

    def transform_element(self, el: str, tag: str):
        if tag == 'operator':
            return self.transform_operator(el)
        if tag in ('left parenthesis', 'right parenthesis'):
            return self.transform_parenthesis(el.rstrip())
        return el.rstrip()

    def add_el(container: list, el):
        if type(el) == list:
            container += el

    def check_right_part(self):
        next_pos = 0
        if self._state == 'assignment operator':
            input_str = self.checked_string.split('=', 1)(1).strip()
            input_str = self.checked_string.strip()
        if not input_str:
            return False
        while True:
            current: str = input_str(next_pos:)
            sym: str = self.get_first(current)
            name = self.get_tag(sym)
            end_tag = self.get_end_tag(name)
            el, offset = self.get_fragment_params(value=current, end=end_tag)

            conditions = (
            if not any(conditions):
                return False
            el = self.transform_element(el=el, tag=name)
            if not self.expression_stack or self.expression_stack(-1) == '(':
                if el in '+-':
            self.add_el(self.expression_stack, el)
            if offset is None:
                return True
            temp = current(offset:)
            offset += temp.find(temp.lstrip())
            next_pos += offset

    def to_rpn(self):
        f = False
        operators: list = ()
        for item in self.expression_stack:
            if self.is_digit(item) or self.is_variable(item):
                if not operators:
                    if item == '(' or self.operator_priority(item) > self.operator_priority(operators(-1)):
                        if not operators:
                            return False
                        while operators:
                            operator = operators.pop()
                            if operator == '(':
                                f = True
                        if item == ')' and not f:
                            return False
                        if item != ')':

        if operators:
            if '(' in operators:
                return False
                while operators:
        return True

    # End of class SyntacticalAnalyzer

class Interpreter:
    bye_string = 'Bye!'
    help_string = 'The program calculates expressions using addition, subtraction, multiplication, integer division' 
                  ' and exponentiation over a set of integers, and also uses variables.'

    def __init__(self, obj):
        self.variables: dict = {}
        self.obj = obj
        self.error: str = None
        self.res: int = None
        self.rpn_stack: deque = deque()

    def execute(self):
        if not self.analysis_handler():
            return False
        return True

    def analysis_handler(self):
        Читает self.obj.
        self.rpn_stack = deque()
        self.res = None
        self.error = None
        if self.obj('state') == 'empty':
        if self.obj('state') == 'command':
            if not self.command_handler(self.obj('command')):
                return False
        if self.obj('state') == 'expression':
            if not self.expression_handler():

        if self.obj('state') == 'assignment operator':
            if not self.assignment_handler():
        return True

    def command_handler(self, param: str) -> bool:
        if param == '/exit':
            return False
        if param == "https://codereview.stackexchange.com/help":
            return True

    def expression_handler(self):
        if not self.check_variables():
            return False
        self.res = self.get_expression_result()
        return True

    def calculate_this(one, two, sign):
        one, two = (int(x) for x in (one, two))
        if sign == '+':
            return one + two
        if sign == '-':
            return one - two
        if sign == '*':
            return one * two
        if sign == "https://codereview.stackexchange.com/":
            return one // two
        if sign == '^':
            return one ** two

    def is_digit(item: str):
        if item(0) == '0':
            if len(item) != 1:
                return False
            return True
        for el in item:
            if el not in '1234567890':
                return False
        return True

    def get_expression_result(self):
        result_stack: list = ()

        while self.rpn_stack:
            item = self.rpn_stack.popleft()
            if self.is_digit(item):
                second, first = result_stack.pop(), result_stack.pop()
                result_stack.append(self.calculate_this(first, second, item))
        return result_stack(0)

    def assignment_handler(self):
        if not self.expression_handler():
            return False
        left = self.obj('left')
        self.variables(left) = self.res
        return True

    def check_variables(self):
        self.rpn_stack = self.obj('rpn_expression')
        for i, item in enumerate(self.rpn_stack):
            if item in self.variables:
                self.rpn_stack(i) = self.variables(item)
                if item(0) in ascii_letters:
                    return False
        return True

class SmartCalculator:
    The name of a variable (identifier) can contain only Latin letters.
A variable can have a name consisting of more than one letter.
The case is also important; for example, n is not the same as N.
The value can be an integer number or a value of another variable.
It should be possible to set a new value to an existing variable.
To print the value of a variable you should just type its name.
    _analyzer_methods = ('run_check_chain')
    _interpreter_methods = ('execute', 'analysis_handler')

    def __init__(self):
        self._analyzer: SyntacticalAnalyzer = SyntacticalAnalyzer()
        self.analyzer_result: dict = self._analyzer.check_result
        self._interpreter: Interpreter = Interpreter(self.analyzer_result)

    def __getattr__(self, item):
        for item in self._analyzer_methods + self._interpreter_methods:
            if item in self._analyzer_methods:
                return getattr(self._analyzer, item)
            if item in self._interpreter_methods:
                return getattr(self._interpreter, item)

    def run(self):
        while True:
            self._analyzer.checked_string = input().strip()
            if self._analyzer.res('error') is not None and self._analyzer.res('error') != 'empty':
                if not self._interpreter.execute():
                    return None

calculator = SmartCalculator()

professional training – Educational activities to enter the cybersecurity profession?

This is a question regarding the ways in which people can get their feet wet with ethical hacking:

How do I start getting into PenTesting? from hacking

This is an extremely technical area, but most of the time, the best way to learn things is through activities (such as coding and executing programs). You might read an entire book on internet security and not be able to apply your knowledge in a practical way.

What activities have you engaged in that have helped you prepare for a cybersecurity profession? Do many cybersecurity professionals learn what they are doing through "crime", or is it just a stereotype? Are there certain skill sets that guarantee success in a cybersecurity profession?

Are opening a blog, posting technology / educational content, and making money via blogger compensation methods like AdSense legal?

I plan to open a blog website and publish technology-based educational content as articles in Turkish language. The topics I will cover are Microsoft and Linux system administration, cybersecurity, software, hardware, the web, mobile and desktop applications with their use and many more things like this.

More clearly, for example, I will post:

  • What is Active Directory and how to install it on the Windows version x.x.x?
  • How to configure the DNS server on Ubuntu?
  • What should be considered for cybersecurity?
  • What are social engineering methods and how to implement them?
  • How to execute JavaScript code in C # application? (or it can be a full JavaScript tutorial)
  • What are the differences between USB 2.0 and 3.0?
  • How to change the desktop wallpaper on Windows 10?
  • How to change the screen brightness on the IOS x.x.x version?
  • How to use TeamViewer?

As you can guess, for all this, I need tons of programs, software, tools like VMware, virtual machines like Kali Linux, Ubuntu, Windows Server 2012 or 2016, Windows 8 or 10 and screenshots.

I plan to use a trial, free or non-commercial version of these to prepare my content. My future plan is to add English articles and video content to my blog. However, I don't know how to use the tools, software and programs as I mentioned with the goal of making money is legal.

Request for reference of educational material in source format, for accessibility for the blind


I am a blind undergraduate math student. I use screen reader software, which uses text-to-speech to read aloud the contents of the screen, to read and write math.

Due to the limitations of presentation formats such as PDF and MathJax, screen readers cannot properly handle most of the mathematical content they contain.

This means that for the most part, I can only correctly access mathematical documents in their source format, like LaTeX; this considerably limits the resources available to students.
Fortunately, there are some excellent online math resources that include content sources, like Wikipedia and NLab, but sometimes they are not enough on their own to learn a subject well.

Sometimes I have had the chance to reach out to kind teachers and publishers about particular textbooks, which they have been able to provide in source format;
but in general it is very difficult to find other good learning resources available as a source.

Another good resource is Arxiv, which often allows you to download the source of an article, but it is very difficult to browse mountains of articles specifically for educational resources.


What would be really nice is a complete list by subject of the educational resources in mathematics that people have made available online as a source;
and that is what I would like this question to become.

So: if you have (or know) course notes, textbooks or similar, which are available online in source form, via Arxiv, or elsewhere, post it as an answer, and I will keep the question updated with a categorized list.
(Note: no special processing is required to make the LaTeX screen reader user-friendly.)

Thank you in advance for making life easier for blind students in math.

P.S. I hope this is a suitable place to do this post; sorry in advance if this is not the case.

Wooden educational toys

Topic is closed by

schema.org – Need help with JSON-LD markup for educational software

My small business develops educational software for algebra, geometry and other mathematics.
topics. The software is designed for Windows desktop computers. We have a site through which
we sell the software and each package has its own page.

I want to add a JSON-LD tag to these product pages so that our search results are
richer and more descriptive. But I have trouble understanding the different types and categories
products defined by schema.org. My goal is to specify as closely as possible the details of
each software product.

For example, I am selling a program that teaches high school algebra. If I had to invent my own categories
and subcategories to specify the product, I would do it like this:

Product -> Software -> Educational -> Math -> Algebra

But I do not see such a hierarchy in the schema.org documentation.

Instead, I see the following:

Thing -> CreativeWork -> SoftwareApplication

In SoftwareApplication, I see "applicationCategory" with "Game" as an example.
But I do not see a list of other possible categories, such as "Educational".
Do you compose your own categories or do you select predefined choices?

And there is "applicationSubCategory" with "arcade game" as an example.
I do not know how to see the other possible subcategories. I would choose "Math"
if it is allowed. In addition, I would like to have a sub-sub-category, where I would like
specify "algebra".

Can any one offer advice on how to categorize my products in JSON-LD?
Or maybe you could give me some documentation that would clarify things for me.

Thank you so much.