Oleg Doubrovine olekashiwa

## toxic_comments_example.ipynb

      
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                olekashiwa
                / toxic_comments_example.ipynb
            
            
              Created
              November 25, 2021 16:30
                — forked from ershovio/toxic_comments_example.ipynb
            
              
                An example of data science task
              
          
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## erc721-example.sol
pragma solidity ^0.4.19;
contract ERC721 {
   string constant private tokenName = "My ERC721 Token";
   string constant private tokenSymbol = "MET";
   uint256 constant private totalTokens = 1000000;
   mapping(address => uint) private balances;
   mapping(uint256 => address) private tokenOwners;
   mapping(uint256 => bool) private tokenExists;
   mapping(address => mapping (address => uint256)) private allowed;
   mapping(address => mapping(uint256 => uint256)) private ownerTokens;
	pragma solidity ^0.4.19;
	contract ERC721 {
	string constant private tokenName = "My ERC721 Token";
	string constant private tokenSymbol = "MET";
	uint256 constant private totalTokens = 1000000;
	mapping(address => uint) private balances;
	mapping(uint256 => address) private tokenOwners;
	mapping(uint256 => bool) private tokenExists;
	mapping(address => mapping (address => uint256)) private allowed;
	mapping(address => mapping(uint256 => uint256)) private ownerTokens;