fzdp

/**
 * const upyun = new Upyun({
 *   bucket: "test-bucket",
 *   operator: "admin-user",
 *   getSignatureUrl: "https://example.com/upyun/getSignature"
 * });
 *
 * upyun.upload({
 *   file: file,
 *   remotePath: '/dev/{year}/{mon}/{day}/{filename}{.suffix}',

fzdp

class Expression:
    operator_precedence = {'+': 0, '-': 0, '*': 1, '/': 1}
    operator_calculator = {
        '+': lambda v1,v2 : v1 + v2,
        '-': lambda v1,v2 : v1 - v2,
        '*': lambda v1,v2 : v1 * v2,
        '/': lambda v1,v2 : v1 / v2
    }
    valid_operators = ['+','-','*','/']