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How to use __cmd method in ATX

Best Python code snippet using ATX

xhdfs2.py

Source:xhdfs2.py

1#! /usr/local/bin/python32import os3import re4import sys5import atexit6import readline7import argparse8from subprocess import call, check_output9# TODO add alias support10# TODO wildcard support11# TODO multi version support12# TODO cron write history cmd file support13class Watcher:14    def path_change(self, path):15        pass16class PathWatcher(Watcher):17    def __init__(self, cmd):18        self.__cmd = cmd19        self.__hdfs_choices_cached = {}20        readline.parse_and_bind("tab: complete")21        readline.set_completer(self.completer)22        readline.set_completer_delims(' /')23        self.__histfile = os.path.expandvars('${HOME}/.xhdfs_history')24        if os.path.exists(self.__histfile):25            readline.read_history_file(self.__histfile)26        atexit.register(self.__save_histfile)27        self.__local_choices = []28        self.__remote_choices = []29        self.__mk_remote_choices('/')30        self.__mk_local_choices(os.getcwd())31    def path_change(self, path):32        if app.is_hdfs_mode:33            self.__mk_remote_choices(path)34        else:35            self.__mk_local_choices(path)36    def choice_layout(self):37        if app.print_autocomp_words:38            if len(self.__local_choices) > 0:39                print('\n--->local')40            cnt = 041            for choice in self.__local_choices:42                cnt += 143                if cnt % 4 == 0:44                    print()45                print(choice.rjust(35), end=' ')46            if len(self.__remote_choices) > 0:47                print('\n\n--->hdfs')48            cnt = 049            for choice in self.__remote_choices:50                cnt += 151                if cnt % 4 == 0:52                    print()53                print(choice.rjust(35), end=' ')54            if len(self.__local_choices) > 0 or len(self.__remote_choices) > 0:55                print()56    def completer(self, text, state):57        try:58            words = []59            line = readline.get_line_buffer()60            line = [ele for ele in re.split(r'\s+', line) if ele != '']61            if len(line) == 1:62                words = self.__cmd.hdfscmd()63            elif len(line) > 1:64                line = line[-1]65                if line.find('/') == -1:66                    words = app.watcher().__choices()67                else:68                    if not line[-1].endswith('/'):69                        line = os.path.dirname(line)70                    local_path = os.path.join(os.getcwd(), line)71                    if os.path.exists(local_path):72                        lchoices = check_output(['ls', local_path]).decode('utf-8').split('\n')[:-1]73                        words.extend(lchoices)74                        # print(f'\n@lchoices: {lchoices}@')75                    else:76                        hdfs_path = os.path.join(app.path().cwd(), line)77                        if hdfs_path in self.__hdfs_choices_cached.keys():78                            words.extend(self.__hdfs_choices_cached[hdfs_path])79                        else:80                            rchoices = check_output(['hdfs', 'dfs', '-ls', hdfs_path]).decode('utf-8').split('\n')[1:-1]81                            rchoices = [rch.split('/')[-1] for rch in rchoices]82                            words.extend(rchoices)83                            self.__hdfs_choices_cached[hdfs_path] = rchoices84                        # print(f'\n@rchoices: {words}@')85            words = [word for word in words if word.startswith(text)]86            # print(f'\n@auto complete word: {words[state]}@')87            return words[state]88        except IndexError:89            # print('\n@out of range@')90            return None91    def __save_histfile(self):92        readline.write_history_file(self.__histfile)93    def __mk_local_choices(self, path):94        self.__local_choices = check_output(['ls', path]).decode('utf-8').split('\n')[:-1]95    def __mk_remote_choices(self, path):96        self.__remote_choices = check_output(['hdfs', 'dfs', '-ls', path]).decode('utf-8').split('\n')[1:-1]97        self.__remote_choices = [rch.split('/')[-1] for rch in self.__remote_choices]98    def __choices(self):99        if args.dyn_choices:100            lcwd, rcwd = app.path().dcwd()101            self.__mk_local_choices(lcwd)102            self.__mk_remote_choices(rcwd)103        return self.__local_choices + self.__remote_choices104class BasePath:105    def __init__(self, cwd, oldcwd):106        self.__cwd = None107        self.__oldcwd = None108        self.__watchers = []109        self.cwd = cwd110        self.oldcwd = oldcwd111    def add_watcher(self, watcher):112        self.__watchers.append(watcher)113    def dscribe(self, path):114        [watcher.path_change(path) for watcher in self.__watchers]115    @property116    def cwd(self):117        return self.__cwd118    @cwd.setter119    def cwd(self, val):120        if self.__cwd != val:121            self.dscribe(val)122        self.__cwd = val123    @property124    def oldcwd(self):125        return self.__oldcwd126    @oldcwd.setter127    def oldcwd(self, val):128        self.__oldcwd = val129class Path:130    def __init__(self):131        self.__local_path = Path.LocalPath(os.getcwd(), os.getcwd())132        self.__remote_path = Path.RemotePath('/', '/')133        self.__path = self.__remote_path134    class LocalPath(BasePath):135        def __init__(self, cwd, oldcwd):136            super().__init__(cwd, oldcwd)137        def cd(self, path):138            if 'cd' == path:139                self.oldcwd = self.cwd140                os.chdir(os.path.expandvars('${HOME}'))141                self.cwd = os.getcwd()142            elif path == '..':143                self.oldcwd = self.cwd144                os.chdir(os.pardir)145                self.cwd = os.getcwd()146            elif path == '-':147                os.chdir(self.oldcwd)148                self.oldcwd, self.cwd = self.cwd, self.oldcwd149            else:150                dst = Path.normalize(path, self.cwd)151                if os.path.exists(dst):152                    os.chdir(dst)153                    self.oldcwd = self.cwd154                    self.cwd = dst155                else:156                    print(f'cd: no such directory: {path}')157    class RemotePath(BasePath):158        def __init__(self, cwd, oldcwd):159            super().__init__(cwd, oldcwd)160        def cd(self, path):161            if 'cd' == path:162                self.oldcwd = self.cwd163                self.cwd = '/'164            elif path == '..':165                self.oldcwd = self.cwd166                self.cwd = os.path.dirname(self.cwd)167            elif path == '-':168                self.oldcwd, self.cwd = self.cwd, self.oldcwd169            else:170                dst = Path.normalize(path, self.cwd)171                if 0 == call(['hadoop', 'fs', '-test', '-d', dst]):172                    self.oldcwd = self.cwd173                    self.cwd = dst174                else:175                    print(f'cd: no such directory: {path}')176    def mode(self, mode):177        if mode:178            self.__path = self.__remote_path179        else:180            self.__path = self.__local_path181    def add_watcher(self, awatcher):182        self.__local_path.add_watcher(awatcher)183        self.__remote_path.add_watcher(awatcher)184    def prompt(self):185        local_bname = Path.__basename(self.__local_path.cwd)186        remote_bname = Path.__basename(self.__remote_path.cwd)187        prompt = '>'188        cmd_mode_prompt = 'hdfs'189        if not app.is_hdfs_mode:190            prompt += '>>'191            cmd_mode_prompt = 'local'192        return f'\n[{cmd_mode_prompt}][{local_bname}:{remote_bname}]{prompt} '193    def cwd(self):194        return self.__path.cwd195    def dcwd(self):196        return self.__local_path.cwd, self.__remote_path.cwd197    def cd(self, path):198        self.__path.cd(path)199    @staticmethod200    def normalize(path, cwd):201        if not path.startswith('hdfs://'):202            path = os.path.join(cwd, path)203            path = os.path.normpath(path)204        return path205    @staticmethod206    def __basename(path: str):207        if len(path) > 0:208            if path != '/':209                if path.endswith('/'):210                    path = os.path.basename(os.path.dirname(path))211                else:212                    path = os.path.basename(path)213        else:214            path = '/'215        return path216class Command:217    def __init__(self):218        self.__CMD_PWD = 'pwd'219        self.__CMD_EXIT = 'exit'220        self.__CMD_LOG_PRINT = 'log-print'221        self.__CMD_PRINT = 'cmd-print'222        self.__CMD_HISTORY = 'history'223        self.__CMD_CD = 'cd'224        self.__CMD_HDFS_ADDR = 'hdfs-addr'225        self.__CMD_ALIAS = 'alias'226        self.__CMD_CAT = 'cat'227        self.__CMD_CP = 'cp'228        self.__CMD_CHMOD = 'chmod'229        self.__CMD_CHOWN = 'chown'230        self.__CMD_GET = 'get'231        self.__CMD_LS = 'ls'232        self.__CMD_LL = 'll'233        self.__CMD_LSR = 'lsr'234        self.__CMD_MKDIR = 'mkdir'235        self.__CMD_MV = 'mv'236        self.__CMD_PUT = 'put'237        self.__CMD_RM = 'rm'238        self.__CMD_RMR = 'rmr'239        self.__CMD_TAIL = 'tail'240        self.__CMD_TOUCH = 'touch'241        self.__CMD_USAGE = 'usage'242        self.__common_alias: dict[str, list[str]] = {243            self.__CMD_LSR: [self.__CMD_LS, '-R'],244            self.__CMD_RMR: [self.__CMD_RM, '-R']245        }246        self.__hdfs_alias: dict[str, list[str]] = {247            self.__CMD_LL: [self.__CMD_LS, '']248        }249        self.__local_alias: dict[str, list[str]] = {250            self.__CMD_LL: [self.__CMD_LS, '-l']251        }252        self.__cmd: list[str] = []253        self.__hdfscmd: list[str] = ['!']254        for attr in dir(self):255            if attr.__contains__('__CMD'):256                self.__hdfscmd.append(self.__getattribute__(attr))257    def hdfscmd(self):258        return self.__hdfscmd259    def parse(self, cmd):260        self.__cmd = re.split(r'\s+', cmd)261        self.__cmd = [ele for ele in self.__cmd if ele != '']262        if 0 == len(self.__cmd):263            return264        self.__handle_alias()265        cname = self.__cmd[0]266        if cname == self.__CMD_EXIT:267            sys.exit()268        elif cname == '!':269            app.is_hdfs_mode = not app.is_hdfs_mode270        elif cname == self.__CMD_PWD:271            print(os.path.normpath(app.path().cwd()))272        elif cname == self.__CMD_ALIAS:273            self.__alias()274        elif cname == self.__CMD_LOG_PRINT:275            app.print_autocomp_words = not app.print_autocomp_words276        elif cname == self.__CMD_PRINT:277            app.print_cmd = not app.print_cmd278        elif cname == self.__CMD_HISTORY:279            Command.__history()280        elif cname == self.__CMD_CD:281            app.path().cd(self.__cmd[-1])282        elif cname == self.__CMD_HDFS_ADDR:283            Command.__hdfs_addr()284        # system commands285        elif not app.is_hdfs_mode:286            self.__exec()287        # hdfs commands288        elif cname == self.__CMD_CAT:289            self.__cat()290        elif cname == self.__CMD_CP:291            self.__cp()292        elif cname == self.__CMD_CHMOD:293            self.__chmod()294        elif cname == self.__CMD_CHOWN:295            self.__chown()296        elif cname == self.__CMD_GET:297            self.__get()298        elif cname == self.__CMD_LS:299            self.__ls()300        elif cname == self.__CMD_MKDIR:301            self.__mkdir()302        elif cname == self.__CMD_MV:303            self.__mv()304        elif cname == self.__CMD_PUT:305            self.__put()306        elif cname == self.__CMD_RM:307            self.__rm()308        elif cname == self.__CMD_TAIL:309            self.__tail()310        elif cname == self.__CMD_TOUCH:311            self.__touch()312        elif cname == self.__CMD_USAGE:313            self.__usage()314        else:315            return self.__not_find_cmd()316    # commands implementation317    def __cat(self):318        # cat URI319        if self.__non_options() < 2:320            return321        lcwd, rcwd = app.path().dcwd()322        for i in range(1, len(self.__cmd)):323            if not self.__cmd[i].startswith('-'):324                self.__cmd[i] = Path.normalize(self.__cmd[i], rcwd)325        326        self.__exec()327    def __cp(self):328        # cp [-f] URI <dest>329        non_options = self.__non_options()330        if non_options < 2:331            return332        elif non_options == 2:333            self.__cmd.append(app.path().cwd())334        lcwd, rcwd = app.path().dcwd()335        for i in range(1, len(self.__cmd)):336            if not self.__cmd[i].startswith('-'):337                self.__cmd[i] = Path.normalize(self.__cmd[i], rcwd)338        self.__exec()339    def __chmod(self):340        # chmod [-R] <MODE[,MODE]... | OCTALMODE> PATH...341        if self.__non_options() < 3:342            return343        self.__cmd[-1] = Path.normalize(self.__cmd[-1], app.path().dcwd()[1])344        self.__exec()345    def __chown(self):346        # chown [-R] [OWNER][:[GROUP]] PATH...347        if self.__non_options() < 3:348            return349        self.__cmd[-1] = Path.normalize(self.__cmd[-1], app.path().dcwd()[1])350        self.__exec()351    def __get(self):352        # get [-f] URI353        if self.__non_options() < 2:354            return355        lcwd, rcwd = app.path().dcwd()356        for i in range(1, len(self.__cmd) - 1):357            if not self.__cmd[i].startswith('-'):358                self.__cmd[i] = Path.normalize(self.__cmd[i], rcwd)359        self.__cmd[-1] = Path.normalize(self.__cmd[-1], lcwd)360        self.__exec()361    def __ls(self):362        # ls [-d] [-h] [-R] [<path> ...]363        nopt = self.__non_options()364        if 1 == nopt:365            self.__cmd.append(app.path().dcwd()[1])366        lcwd, rcwd = app.path().dcwd()367        for i in range(1, len(self.__cmd)):368            if not self.__cmd[i].startswith('-'):369                self.__cmd[i] = Path.normalize(self.__cmd[i], rcwd)370        self.__exec()371    def __mkdir(self):372        # mkdir [-p] <paths>373        if self.__non_options() < 2:374            return375        if '-p' not in self.__cmd:376            self.__cmd.insert(1, '-p')377        lcwd, rcwd = app.path().dcwd()378        for i in range(1, len(self.__cmd)):379            if not self.__cmd[i].startswith('-'):380                self.__cmd[i] = Path.normalize(self.__cmd[i], rcwd)381        self.__exec()382    def __mv(self):383        # mv URI <dest>384        non_options = self.__non_options()385        if non_options < 2:386            return387        elif non_options == 2:388            self.__cmd.append(app.path().cwd())389        for i in range(1, len(self.__cmd)):390            if not self.__cmd[i].startswith('-'):391                self.__cmd[i] = Path.normalize(self.__cmd[i], app.path().cwd())392        self.__exec()393    def __put(self):394        # put [-f] [-p] [-l] [-d] <localsrc> <dst>395        non_options = self.__non_options()396        if non_options < 2:397            return398        elif non_options == 2:399            self.__cmd.append(app.path().cwd())400        lcwd, rcwd = app.path().dcwd()401        for i in range(1, len(self.__cmd) - 1):402            if not self.__cmd[i].startswith('-'):403                self.__cmd[i] = Path.normalize(self.__cmd[i], lcwd)404        self.__cmd[-1] = Path.normalize(self.__cmd[-1], rcwd)405        self.__exec()406    def __rm(self):407        # rm [-R] URI408        if self.__non_options() < 2:409            return410        lcwd, rcwd = app.path().dcwd()411        for i in range(1, len(self.__cmd)):412            if not self.__cmd[i].startswith('-'):413                self.__cmd[i] = Path.normalize(self.__cmd[i], rcwd)414        self.__exec()415    def __tail(self):416        # tail [-f] URI417        if self.__non_options() < 2:418            return419        self.__cmd[-1] = Path.normalize(self.__cmd[-1], app.path().cwd())420        self.__exec()421    def __touch(self):422        # touchz URI423        if self.__non_options() < 2:424            return425        self.__cmd[0] += 'z'426        lcwd, rcwd = app.path().dcwd()427        for i in range(1, len(self.__cmd)):428            if not self.__cmd[i].startswith('-'):429                self.__cmd[i] = Path.normalize(self.__cmd[i], rcwd)430        self.__exec()431    @staticmethod432    def __history():433        hist = os.path.expandvars('${HOME}/.xhdfs_history')434        if os.path.exists(hist):435            with open(hist) as f:436                for cmd in f.readlines():437                    print(cmd, end='')438    def __usage(self):439        # usage command440        if self.__non_options() < 2:441            return442        self.__exec()443    def __exec(self):444        cmd = ' '.join(self.__cmd)445        if app.is_hdfs_mode:446            cmd = 'hdfs dfs -' + cmd447        if app.print_cmd:448            print(f'\033[1;32;47m{cmd}\033[0m')449        call(cmd, shell=True)450    def __non_options(self):451        return len([ele for ele in self.__cmd if not ele.startswith('-')])452    def __not_find_cmd(self):453        cmd = ''.join(self.__cmd)454        cmd = f'command not find: {cmd}'455        print(f'\033[1;32;47m{cmd}\033[0m')456    def __handle_alias(self):457        key = self.__cmd[0]458        if key in self.__common_alias.keys():459            self.__cmd[0] = self.__common_alias[key][0]460            options = self.__common_alias[key][1]461            if len(options) > 0:462                self.__cmd.insert(1, options)463            return464        if app.is_hdfs_mode and key in self.__hdfs_alias.keys():465            self.__cmd[0] = self.__hdfs_alias[key][0]466            options = self.__hdfs_alias[key][1]467            if len(options) > 0:468                self.__cmd.insert(1, options)469        elif key in self.__local_alias.keys():470            self.__cmd[0] = self.__local_alias[key][0]471            options = self.__local_alias[key][1]472            if len(options) > 0:473                self.__cmd.insert(1, options)474    @staticmethod475    def __hdfs_addr():476        if os.getenv('HADOOP_HOME'):477            core_site_file = os.path.join(os.environ['HADOOP_HOME'], 'etc/hadoop/core-site.xml')478            cmd = f'grep -B 2 -A 1 \'hdfs://\' {core_site_file}'479            if app.print_cmd:480                print(cmd)481            call(cmd, shell=True)482        else:483            print('HADOOP_HOME environment variable not set!')484    def __alias(self):485        # alias alia=cmd [-h|-l|-c] [-option1, ...]486        if len(self.__cmd) == 1:487            self.__print_alias()488            return489        what = re.fullmatch(r'(?P<alia>\w+)\s*='490                            r'\s*(?P<cmd>\w+)(\s+-(?P<mode>[hlc]))?(?P<options>\s+-\w+)*', ' '.join(self.__cmd[1:]))491        if what:492            alia = what.group('alia')493            cmd = what.group('cmd')494            mode = what.group('mode')495            options = what.group('options').lstrip(' ')496            val = [cmd]497            if options:498                options = options.split(r'\s+')499                val += options500            if not mode or mode == 'h':501                self.__hdfs_alias[alia] = val502            elif mode == 'l':503                self.__local_alias[alia] = val504            elif mode == 'c':505                self.__common_alias[alia] = val506    def __print_alias(self):507        alias = self.__common_alias508        if app.is_hdfs_mode:509            alias.update(self.__hdfs_alias)510        else:511            alias.update(self.__local_alias)512        for k, v in alias.items():513            v = [i for i in v if len(i) > 0]514            print(f'alias {k}=' + ' '.join(v))515class Main:516    def main(self):517        while True:518            self.watcher().choice_layout()519            # cmd = input(self.path().prompt())520            print(f'\033[1;32;47m{self.path().prompt()}\033[0m', end='')521            self.__cmd.parse(input())522    def __init__(self):523        self.__hdfs = True524        self.print_cmd = args.cmd_print525        self.print_autocomp_words = args.log_print526        self.__cmd = Command()527        self.__path = Path()528        self.__addr = args.hdfs_address529        self.init()530        self.__watcher = PathWatcher(self.__cmd)531        self.__path.add_watcher(self.__watcher)532    def init(self):533        if self.__addr:534            if os.getenv('HADOOP_HOME'):535                core_site_file = os.path.join(os.environ['HADOOP_HOME'], 'etc/hadoop/core-site.xml')536                with open(core_site_file) as f:537                    core_site_conf = f.readlines()538                for row, line in enumerate(core_site_conf):539                    if line.find('hdfs://') != -1:540                        core_site_conf[row] = ' ' * 8 + f'<value>hdfs://{self.__addr}</value>\n'541                        break542                with open(core_site_file, 'w') as f:543                    f.writelines(core_site_conf)544            else:545                print('HADOOP_HOME environment variable not set!')546    @property547    def is_hdfs_mode(self):548        return self.__hdfs549    @is_hdfs_mode.setter550    def is_hdfs_mode(self, val):551        self.__hdfs = val552        self.path().mode(val)553    def path(self):554        return self.__path555    def watcher(self):556        return self.__watcher557def parse_args():558    parser = argparse.ArgumentParser(formatter_class=argparse.ArgumentDefaultsHelpFormatter)559    parser.add_argument('-c', '--cmd-print', action='store_true', help='if print exec command')560    parser.add_argument('-l', '--log-print', action='store_true', help='if print auto completion candidate words')561    parser.add_argument('-s', '--hdfs-address', help='hdfs cluster address')562    parser.add_argument('-d', '--dyn-choices', action='store_true', help='if dynamic make choices')563    return parser.parse_args()564if __name__ == '__main__':565    try:566        args = parse_args()567        # print(args)568        app = Main()569        app.main()570    except (EOFError, KeyboardInterrupt):...

lcd.py

Source:lcd.py

1import RPi.GPIO as GPIO2import time3import os4GPIO.setmode(GPIO.BCM)5GPIO.setwarnings(False)6## note=after calling GPIO.cleanup() function all data on display will get erase.7## You cannot use __send_data(), __send() functions and any variables used8## in all functions of this library. The functions which available for user is9## Print(note that capital P),clear,shift,begin,setCursor,blinkCursorOn,10## blinkCursorOff and The variables which available for user is right and left11## which used to indicated direction for shift the display.thanks for using12## this library. for more details or query you can mail me at13## shubham@electro-passion.com    14class lcd:15    right=True16    left=False17    __cmd=False18    __data=True19    def __send_data(self,value,signal):20        GPIO.output(self.__RS,signal)21        self.__send(value>>4)22        self.__send(value)23        time.sleep(0.001)        24        25    def __send(self,val):26        self.__val=val27        for i in range (0,4):28            GPIO.output(self.__D[i],((self.__val>>i)  & 0x01))29        GPIO.output(self.__EN,False)30        time.sleep(0.000001)31        GPIO.output(self.__EN,True)32        time.sleep(0.000001)33        GPIO.output(self.__EN,False)34        time.sleep(0.0001)35    def Print(self,text):36        self.__text=str(text)37        self.__length=len(self.__text)38        for i in range (0,self.__length):39            self.__a=ord(self.__text[i])40            self.__send_data(self.__a,self.__data)41    def clear(self):42        self.__send_data(0x01,self.__cmd)43		44    def setCursor(self,row,col):45        self.__col=col-146        self.__row=row47        if(self.__row==1):48            self.__pos=0x8049        if(self.__row==2):50            self.__pos=0xC051        self.__cursor=self.__pos+self.__col52        self.__send_data(self.__cursor,self.__cmd)   53        54    def begin(self,d4,d5,d6,d7,rs,en):55        self.__D=[d4,d5,d6,d7]56        self.__RS=rs57        self.__EN=en58        for i in range(0,4):59            GPIO.setup(self.__D[i],GPIO.OUT)60        GPIO.setup(self.__RS,GPIO.OUT)61        GPIO.setup(self.__EN,GPIO.OUT)62        time.sleep(0.050)63        self.__send_data(0x30,self.__cmd)##first try64        time.sleep(0.05)65        self.__send_data(0x30,self.__cmd)##sencond try66        time.sleep(0.05)67        self.__send_data(0x30,self.__cmd)##third try68        time.sleep(0.0015)69        self.__send_data(0x20,self.__cmd)##final go70        self.__send_data(0x28,self.__cmd)##select 4 bit, mode 2 lins ,5x7 font71        self.__send_data(0x01,self.__cmd)##clear screen72        self.__send_data(0x06,self.__cmd)##display ON73        self.__send_data(0x80,self.__cmd)## bring cursor to position 0 of line 174        self.__send_data(0x0C,self.__cmd)## turn display ON for cursor blinking75    def shift(self,direction,count):76        self.__direction=direction77        self.__count=count78        if(self.__direction==self.left):79            for i in range (0,self.__count):80                self.__send_data(0x18,self.__cmd)81                time.sleep(1)82        if(self.__direction==self.right):83             for i in range (0,self.__count):84                self.__send_data(0x1C,self.__cmd)85                time.sleep(1)86    def blinkCursorOn(self):87	    self.__send_data(0x0F,self.__cmd)88		89    def blinkCursorOff(self):...

Automation Testing Tutorials

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