/// <reference types="node" />
import { EventEmitter } from 'events';
import { ChildProcess, SpawnOptions } from 'child_process';
import { Readable, Writable } from 'stream';
export interface Options extends SpawnOptions {
    mode?: 'text' | 'json' | 'binary';
    formatter?: (param: string) => any;
    parser?: (param: string) => any;
    stderrParser?: (param: string) => any;
    encoding?: string;
    pythonPath?: string;
    /**
     * see https://docs.python.org/3.7/using/cmdline.html
     */
    pythonOptions?: string[];
    /**
     * overrides scriptPath passed into PythonShell constructor
     */
    scriptPath?: string;
    /**
     * arguments to your program
     */
    args?: string[];
}
export declare class PythonShellError extends Error {
    traceback: string | Buffer;
    exitCode?: number;
}
/**
 * An interactive Python shell exchanging data through stdio
 * @param {string} script    The python script to execute
 * @param {object} [options] The launch options (also passed to child_process.spawn)
 * @constructor
 */
export declare class PythonShell extends EventEmitter {
    scriptPath: string;
    command: string[];
    mode: string;
    formatter: (param: string | Object) => any;
    parser: (param: string) => any;
    stderrParser: (param: string) => any;
    terminated: boolean;
    childProcess: ChildProcess;
    stdin: Writable;
    stdout: Readable;
    stderr: Readable;
    exitSignal: string;
    exitCode: number;
    private stderrHasEnded;
    private stdoutHasEnded;
    private _remaining;
    private _endCallback;
    static defaultPythonPath: string;
    static defaultOptions: Options;
    /**
     * spawns a python process
     * @param scriptPath path to script. Relative to current directory or options.scriptFolder if specified
     * @param options
     */
    constructor(scriptPath: string, options?: Options);
    static format: {
        text: (data: any) => string;
        json: (data: any) => string;
    };
    static parse: {
        text: (data: any) => string;
        json: (data: string) => any;
    };
    /**
     * checks syntax without executing code
     * @param {string} code
     * @returns {Promise} rejects w/ stderr if syntax failure
     */
    static checkSyntax(code: string): Promise<{}>;
    static getPythonPath(): string;
    /**
     * checks syntax without executing code
     * @param {string} filePath
     * @returns {Promise} rejects w/ stderr if syntax failure
     */
    static checkSyntaxFile(filePath: string): Promise<string>;
    /**
     * Runs a Python script and returns collected messages
     * @param  {string}   scriptPath   The path to the script to execute
     * @param  {Options}   options  The execution options
     * @param  {Function} callback The callback function to invoke with the script results
     * @return {PythonShell}       The PythonShell instance
     */
    static run(scriptPath: string, options?: Options, callback?: (err?: PythonShellError, output?: any[]) => any): PythonShell;
    /**
     * Runs the inputted string of python code and returns collected messages. DO NOT ALLOW UNTRUSTED USER INPUT HERE!
     * @param  {string}   code   The python code to execute
     * @param  {Options}   options  The execution options
     * @param  {Function} callback The callback function to invoke with the script results
     * @return {PythonShell}       The PythonShell instance
     */
    static runString(code: string, options?: Options, callback?: (err: PythonShellError, output?: any[]) => any): PythonShell;
    static getVersion(pythonPath?: string): Promise<{
        stdout: string;
        stderr: string;
    }>;
    static getVersionSync(pythonPath?: string): string;
    /**
     * Parses an error thrown from the Python process through stderr
     * @param  {string|Buffer} data The stderr contents to parse
     * @return {Error} The parsed error with extended stack trace when traceback is available
     */
    private parseError;
    /**
     * Sends a message to the Python shell through stdin
     * Override this method to format data to be sent to the Python process
     * @param {string|Object} data The message to send
     * @returns {PythonShell} The same instance for chaining calls
     */
    send(message: string | Object): this;
    /**
     * Parses data received from the Python shell stdout stream and emits "message" events
     * This method is not used in binary mode
     * Override this method to parse incoming data from the Python process into messages
     * @param {string|Buffer} data The data to parse into messages
     */
    receive(data: string | Buffer): this;
    /**
     * Parses data received from the Python shell stderr stream and emits "stderr" events
     * This method is not used in binary mode
     * Override this method to parse incoming logs from the Python process into messages
     * @param {string|Buffer} data The data to parse into messages
     */
    receiveStderr(data: string | Buffer): this;
    private receiveInternal;
    /**
     * Closes the stdin stream, which should cause the process to finish its work and close
     * @returns {PythonShell} The same instance for chaining calls
     */
    end(callback: (err: PythonShellError, exitCode: number, exitSignal: string) => any): this;
    /**
     * Closes the stdin stream, which should cause the process to finish its work and close
     * @returns {PythonShell} The same instance for chaining calls
     */
    terminate(signal?: string): this;
}