אליהו א. סולטניק, Ph.D.

i.e.

@
.com
@
.com
$ mkdir -p ~/projects/iphone/
$ cd ~/projects/iphone/toolchain
$ svn checkout http://iphonedevonlinux.googlecode.com/svn/trunk/ ./

http://www.theiphonewiki.com/wiki/index.php?title=VFDecrypt_Keys:_2.x
$ chmod u+x toolchain.sh
$ mkdir -p files/firmware
$ mkdir -p sdks

$ java -jar hfsx.jar

$ cd ~/projects/iphone/toolchain/sdks
$ xar -xf iphone.pkg Payload
$ cat Payload | zcat | cpio -id
$ mv -f mv -f Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS*.sdk .
$ xar -xf macosx.pkg Payload
$ cat Payload | zcat | cpio -id
$ mv -f SDKs/MacOSX10.*.sdk .

$ cd ~/projects/iphone/toolchain/files/firmware

$ cd ~/projects/iphone/toolchain/
$ ./toolchain.sh headers
$ ./toolchain.sh firmware
$ ./toolchain.sh darwin_sources
$ ./toolchain.sh build

$ ./toolchain.sh clean

$ filedrop
Version: filedrop 0.1 2009-07-01 http://www.sultanik.com/
Copyright (C) 2009 Evan A. Sultanik

Usage: filedrop [OPTIONS] FILE_PATH

Options:
  -s           send a file by hosting it on a local web server (default)
  -r           receive a file by accepting it from a local web server.
               FILE_PATH should be a directory to which the files should be
               saved.  FILE_PATH will default to '.' in this mode.
  -n, --num=N  quit after sending/receiving N files.  If N is less than zero
               the program will send/receive files until manually
               terminated.  If N is zero then the program will immediately
               quit.  Default is -1.

$ filedrop -s -n1 ./hugefile.tar.gz
Server running at: http://my_ip:47489/

#!/usr/bin/perl -w

use HTTP::Daemon;
use HTTP::Status;

my $version = "0.1";
my $date = "2009-07-01";
my $copyright = "2009";

my $port = 80;

sub print_usage {
    print "Version: filedrop $version $date http://www.sultanik.com/\n";
    print "Copyright (C) $copyright Evan A. Sultanik\n\n";
    print "Usage: filedrop [OPTIONS] FILE_PATH\n\n";
    print "Options:\n";
    print "  -s           send a file by hosting it on a local web server (default)\n";
    print "  -r           receive a file by accepting it from a local web server.\n";
    print "               FILE_PATH should be a directory to which the files should be\n";
    print "               saved.  FILE_PATH will default to '.' in this mode.\n";
    print "  -n, --num=N  quit after sending/receiving N files.  If N is less than zero\n";
    print "               the program will send/receive files until manually\n";
    print "               terminated.  If N is zero then the program will immediately\n";
    print "               quit.  Default is -1.\n";
    print "\n";
}

my $mode = "s";
my $num = -1;

my $last = "";
my $nextIsN = 0;
foreach my $arg (@ARGV) {
    if($arg eq "-s") {
        $mode = "s";
    } elsif($arg eq "-r") {
        $mode = "r";
    } elsif($arg eq "-n") {
        $nextIsN = 1;
        next;
    } elsif($arg =~ /-n(\d+)/) {
        $num = $1;
    } elsif($arg =~ m/--num=(\d+)/) {
        $num = $1;
    } elsif($nextIsN) {
        $num = $arg;
    } else {
        if(!($last eq "")) {
            print_usage() && die("Invalid option: " . $last . "\n");
        }
        $last = $arg;
    }
    $nextIsN = 0;
}
if($last eq "" && $mode eq "s") {
    print_usage() && die("Path to a file to host expected!\n");
} elsif($last eq "" && $mode eq "r") {
    $last = ".";
}

my $file = $last;

exit(0) if($num == 0);

my $d = HTTP::Daemon->new(LocalPort => $port) || HTTP::Daemon->new() || die;
print "Server running at: ", $d->url, "\n";
my $servings = 0;
while(my $c = $d->accept) {
    while(my $r = $c->get_request) {
        if($mode eq "s") {
            if($r->method eq 'GET') {
                print "Someone's downloading!\n";
                $c->send_file_response($file);
                print "Download finished!\n";
                $servings++;
            } else {
                $c->send_error(RC_FORBIDDEN)
            }
        } elsif($mode eq "r") {
            if($r->method eq 'POST') {
                print "Someone is uploading!\n";
                $servings++;
                my $url = $r->content;
                while($url =~ m/.*?-+(\d+)\r\nContent-Disposition:.*? filename="([^"]+)".*?\r\n\r\n(.*?)\r\n-+\1-+(.*)$/ism){
                    my $id = $1;
                    my $filename = $2;
                    my $content = $3;
                    $url = $4;
                    my $newName = $filename;
                    my $i = 0;
                    $newName = $filename . "." . ++$i while(-e $file . "/" . $newName);
                    if($i > 0) {
                        print "A file of named $filename already exists in $file!\n";
                        print "Saving to " . $file . "/" . $newName . " instead.\n";
                        $filename = $newName;
                    }
                    open(OUTFILE,">" . $file . "/" . $filename) or die("Error opening $file/$filename for writing!\n");
                    binmode OUTFILE;
                    print OUTFILE $content;
                    close(OUTFILE);
                    print "Received $filename (ID: $id)\n";                    
                }
                $h = HTTP::Headers->new;
                $h->header('Content-Type' => 'text/html');
                my $msg = "UploadedUploaded!";
                $msg .= "Click here to upload another file." if($num < 0 || $servings < $num);
                $msg .= "";
                $r = HTTP::Response->new( HTTP_OK, "", $h, $msg);
                $c->send_response($r);                
            } elsif($r->method eq 'GET') {
                print "Someone connected!  Sending the upload form...\n";
                $h = HTTP::Headers->new;
                $h->header('Content-Type' => 'text/html');
                $r = HTTP::Response->new( HTTP_OK, "", $h, "Upload

Please specify a file, or a set of files:

");
                $c->send_response($r);
                print "Sent!\n";
            } else {
                $c->send_error(RC_FORBIDDEN);
            }
            last if($num > 0 && $servings >= $num);            
        }
        last if($num > 0 && $servings >= $num);
    }
    $c->close;
    undef($c);
    last if($num > 0 && $servings >= $num);
}

close($d);

#!/usr/bin/perl -w

use Term::ReadKey;	END { ReadMode ('restore'); }	# just in case
use Mail::IMAPClient;
use IO::Socket::SSL;
use File::HomeDir;

my $username = '[email protected]';
my $sleeptime = 180; # Time between checks, in seconds.
my $conffile = File::HomeDir->my_home . "/.checkmail";

######################################################

$canceled = 0;
$inwhile = 0;

sub get_passwd {
    # legal clear passwd chrs (26+26+10+24=86): "a-zA-Z0-9!#$%&()*+,-./:;<=> ?@[\]^";
    my @legal_clear = ('a'..'z', 'A'..'Z', '0'..'9', split //,
                       '!#$%&()*+,-./:;<=> ?@[\]^');
    my %legal_clear; foreach (@legal_clear) { $legal_clear{$_} = 1; }
    $| = 1;	# unbuffer stdout to force unterminated line out
    ReadMode ('cbreak');
    my $ch = '';
    while (defined ($ch = ReadKey ())) {
	last if $ch eq "\x0D" or $ch eq "\x0A";
	if ($ch eq "\x08") {	# backspace
            print "\b \b" if $passwd;	# back up 1
            chop $passwd;
            next;
	}
	if ($ch eq "\x15") {	# ^U
            print "\b \b" x length $passwd;	# back 1 for each char
            $passwd = '';
            next;
	}
	if (not exists $legal_clear{$ch}) {
            print "\n'$ch' not a legal password character\n";
            print 'Password: ';
            next;
	}
	$passwd .= $ch;
    }
    print "\n";
    ReadMode ('restore');
    return $passwd;
}

$SIG{'INT'} = 'INT_handler';

sub INT_handler {
    exit(0) if(!$inwhile);
    $canceled = 1;
    print "\nCaught Signal; exiting gracefully!\n";
}

print "Password: ";
my $password = &get_passwd();

while(!$canceled) {
    $inwhile = 1;

    my $socket = IO::Socket::SSL->new(
        PeerAddr => 'imap.gmail.com',
        PeerPort => 993,
        )
        or (print STDERR "Warning: lost internet connection!\n" && next); # Perhaps we lost the internet connection?
    my $greeting = <$socket>;
    my ($id, $answer) = split /\s+/, $greeting;
    die "problems logging in: $greeting" if $answer ne 'OK';

    my $client = Mail::IMAPClient->new(
        Socket   => $socket,
        User     => $username,
        Password => $password,
        Uid => 1,
        )
        or die "new(): $@";
    $client->State(Mail::IMAPClient::Connected());
    $client->login() or die 'login(): ' . $client->LastError();

    die("Failed authentication!\n") unless $client->IsAuthenticated();

    $client->examine('INBOX') or die "Could not examine: $@\n";
    my @msgs = $client->unseen or die "Could not search the inbox! $@\n";

    my $last_max = -2;
    if(-e $conffile) {
        # Load the old largest
        open(CONFFILE, "<" . $conffile) or die("Error opening " . $conffile . "\n");
        while() {
            my $line = $_;
            $last_max = $1 if($line =~ /^\s*last_max_uid\s*=\s*(\d+)\s*$/i);
        }
        close(CONFFILE);
    }

    my $max = -1;
    my @over;
    for my $msg (@msgs) {
        $max = $msg if $msg > $max;
        push(@over, $msg) if $msg > $last_max;
    }

    if($max >= 0) {
        open(CONFFILE, ">" . $conffile) or die("Error opening $conffile for writing!\n");
        print CONFFILE "last_max_uid = " . $max . "\n";
        close(CONFFILE);
    }

    if($last_max >= 0) {
        open(OSDC, "| osd_cat -c green -p middle -A center -s 2 -l 5 -f \"-bitstream-bitstream vera serif-*-*-*-*-17-*-*-*-*-*-*-*\"");
        for my $m (@over) {
            my $hashref = $client->parse_headers($m, "From")
                or die "Could not parse_headers: $@\n";
            print OSDC "New mail from " . $hashref->{"From"}->[0] . "!\n";
        }
        close(OSDC);
    }

    $client->logout();
    sleep $sleeptime;
}

$ ./run_experiments&
[1] 1337
$ emailwhendone 1337
Awaiting process 1337's death...

$ ./run_experiments&
[1] 1337
$ emailwhendone 1337
Password for [email protected]: *******************
Waiting for process 1337 (run_experiments) to finish...
The process finished!
Sending an email to [email protected]...
$

#!/usr/bin/perl -w

use Net::SMTP::SSL;
use Term::ReadKey;	END { ReadMode ('restore'); }	# just in case

my $destination = '[email protected]';
my $server = 'smtp.domain.com';
my $port = 465;

#####################################

sub usage {
    print " Usage: emailwhendone [PID|PROCESS_NAME]\n";
}

my $pid = $ARGV[0] or die &usage();
my $hostname = `hostname`;
my $pidmatch = -1;
my $processmatch = "";
my @pidmatches;

open PRO, "/bin/ps axo pid,comm |" or die 'Failed to open pipe to `ps`';

while() {
    if($_ =~ m/^\s*(\d+)\s+(.+)$/) {
        my $matchpid = $1;
        my $matchprocess = $2;
        if($matchpid eq $pid) {
            $pidmatch = $matchpid;
            $processmatch = $matchprocess;
            @pidmatches = [$matchpid];
            last;
        } elsif($pid =~ m/^\s*$matchprocess\s*$/) {
            $pidmatch = $matchpid;
            push(@pidmatches, $matchpid);
            $processmatch = $matchprocess;
        }
    }
}

close PRO;

if(scalar(@pidmatches) <= 0) {
    if($pid =~ m/^\s*\d+\s*$/) {
        print "Error: no process with ID " . $pid . "!\n";
    } else {
        print "Error: no process named \"" . $pid . "\"!\n";
    }
    exit(1);
} elsif(scalar(@pidmatches) > 1) {
    print "There are multiple PIDs that match this process name!\n";
    for my $match (@pidmatches) {
        print $match . "\t" . $pid . "\n";
    }
    exit(2);
}

sub get_passwd {
    # legal clear passwd chrs (26+26+10+24=86): "a-zA-Z0-9!#$%&()*+,-./:;<=> ?@[\]^";
    my @legal_clear = ('a'..'z', 'A'..'Z', '0'..'9', split //,
                       '!#$%&()*+,-./:;<=> ?@[\]^');
    my %legal_clear; foreach (@legal_clear) { $legal_clear{$_} = 1; }
    $| = 1;	# unbuffer stdout to force unterminated line out
    ReadMode ('cbreak');
    my $ch = '';
    while (defined ($ch = ReadKey ())) {
	last if $ch eq "\x0D" or $ch eq "\x0A";
	if ($ch eq "\x08") {	# backspace
            print "\b \b" if $passwd;	# back up 1
            chop $passwd;
            next;
	}
	if ($ch eq "\x15") {	# ^U
            print "\b \b" x length $passwd;	# back 1 for each char
            $passwd = '';
            next;
	}
	if (not exists $legal_clear{$ch}) {
            print "\n'$ch' not a legal password character\n";
            print 'Password: ', "*" x length $passwd; # retype *'s
            next;
	}
	$passwd .= $ch;
	print '*';
    }
    print "\n";
    ReadMode ('restore');
    return $passwd;
}

print "Password for " . $destination . ": ";
my $password = get_passwd();

sub send_mail {
    my $subject = $_[0];
    my $body = $_[1];

    my $smtp;

    if (not $smtp = Net::SMTP::SSL->new($server,
                                        Port => $port,
                                        Debug => 0)) {
        die "Could not connect to server.\n";
    }

    $smtp->auth($destination, $password)
        || die "Authentication failed!\n";

    $smtp->mail($destination . "\n");
    $smtp->to($destination . "\n");
    $smtp->data();
    $smtp->datasend("From: " . $destination . "\n");
    $smtp->datasend("To: " . $destination . "\n");
    $smtp->datasend("Subject: " . $subject . "\n");
    $smtp->datasend("\n");
    $smtp->datasend($body . "\n");
    $smtp->dataend();
    $smtp->quit;
}

print "Waiting for process " . $pidmatch . " (" . $processmatch . ") to finish...";

my $done = 0;
do {
    $done = 1;
    open PRO, "/bin/ps axo pid |" or die 'Failed to open pipe to `ps`';
    while() {
        if($_ =~ m/^\s*$pidmatch\s*$/) {
            $done = 0;
            last;
        }
    }
    close PRO;
    sleep(1);
} while(!$done);

print "The process finished!\nSending an email to " . $destination . "...";

&send_mail('Process ' . $pidmatch . ' (' . $processmatch . ') on ' . $hostname . ' finished!', 'It\'s done!');

print "\n";

$ chmod 755 ./TwitterGraph.py
$ ./TwitterGraph.py
You have 100 API calls remaining this hour; how many would you like to use now? 80
What is the twitter username for which you'd like to build a graph? ESultanik
Building the graph for ESultanik (output will be ESultanik.dot)...
.
.
.
$ dot -Tps ESultanik.dot -o ESultanik.ps && epstopdf ESultanik.ps && acroread ESultanik.pdf
$ dot -Tsvgz ESultanik.dot -o ESultanik.svgz

#!/usr/bin/python

import simplejson
import urllib2
import urllib
import getopt, sys
import re
import os

class TwitterError(Exception):
  @property
  def message(self):
    return self.args[0]

def CheckForTwitterError(data):
    if 'error' in data:
      raise TwitterError(data['error'])

def fetch_url(url):
    opener = urllib2.build_opener()
    url_data = opener.open(url).read()
    opener.close()
    return url_data

def remaining_api_hits():
    json = fetch_url("http://twitter.com/account/rate_limit_status.json")
    data = simplejson.loads(json)
    CheckForTwitterError(data)
    return data['remaining_hits']

def get_user_info(id):
    global is_username
    global calls
    json = None
    calls += 1
    if is_username:
        json = fetch_url("http://twitter.com/users/show.json?screen_name=" + str(id))
    else:
        json = fetch_url("http://twitter.com/users/show.json?user_id=" + str(id))
    data = simplejson.loads(json)
    CheckForTwitterError(data)
    return data

def get_friends(id):
    global calls
    calls += 1
    json = fetch_url("http://twitter.com/friends/ids.json?user_id=" + str(id))
    data = simplejson.loads(json)
    CheckForTwitterError(data)
    return data

def get_followers(id):
    global calls
    calls += 1
    json = fetch_url("http://twitter.com/followers/ids.json?user_id=" + str(id))
    data = simplejson.loads(json)
    CheckForTwitterError(data)
    return data

last_status_msg = ""
def update_status(message):
    global last_status_msg
    # clear the last message
    sys.stdout.write("\r")
    p = re.compile(r"[^\s]")
    sys.stdout.write(p.sub(' ', last_status_msg))
    sys.stdout.write("\r")
    sys.stdout.write(message)
    last_status_msg = message
    sys.stdout.flush()

def clear_status():
    last_status_msg = ""

def save_state():
    global history
    global user_info
    global friends
    global followers
    global queue
    global username
    data = simplejson.dumps([history, user_info, friends, followers, queue])
    bakfile = open(username + ".json", "w")
    bakfile.write(data)
    bakfile.close()

def build_adjacency():
    global friends
    idxes = {}
    adj = []
    idx = 0
    for user in friends:
        idxes[user] = idx
        idx += 1
        adj.append([0]*len(friends))
    for user in friends:
        if len(friends[user]) <= 0:
            continue
        amount_to_give = 1.0 / len(friends[user])
        for f in friends[user]:
            if str(f) in idxes:
                adj[idxes[user]][idxes[str(f)]] = amount_to_give
    return [idxes, adj]

try:
    opts, args = getopt.getopt(sys.argv[1:], "hu:c:r", ["help", "user=", "calls=", "resume"])
except getopt.GetoptError, err:
    print err
    #usage()
    sys.exit(2)

max_calls = -1
username = ""
load_prev = None

for o, a in opts:
    if o in ("-h", "--help"):
        #usage()
        sys.exit()
    elif o in ("-u", "--user"):
        username = a
    elif o in ("-c", "--calls"):
        max_calls = int(a)
    elif o in ("-r", "--resume"):
        load_prev = True
    else:
        assert False, "unhandled option"

if max_calls != 0:
    # First, let's find out how many API calls we have left before we are rate limited:
    update_status("Contacting Twitter to see how many API calls are left on your account...")
    max_hits = remaining_api_hits()
    if max_calls < 0 or max_hits < max_calls:
        update_status("You have " + str(max_hits) + " API calls remaining this hour; how many would you like to use now? ")
        max_calls = int(raw_input())
        clear_status()
        if max_calls > max_hits:
            max_calls = max_hits
if username == "":
    print "What is the twitter username for which you'd like to build a graph? ",
    username = re.compile(r"\n").sub("", raw_input())

update_status("Trying to open " + username + ".dot for output...")
dotfile = open(username + ".dot", "w")
update_status("")
clear_status()
print "Building the graph for " + username + " (output will be " + username + ".dot)..."

is_username = True
history = {}
queue = [username]
calls = 0
user_info = {}
friends = {}
followers = {}

# Let's see if there's any partial data...
if os.path.isfile(username + ".json"):
    print "It appears as if you have some partial data for this user."
    resume = ""
    if not load_prev:
        print "Do you want to start off from where you last finished? (y/n) ",
        resume = re.compile(r"\n").sub("", raw_input())
    if load_prev == True or resume == "y" or resume == "Y" or resume == "yes" or resume == "Yes" or resume == "YES":
        is_username = False
        bakfile = open(username + ".json", "r")
        [history, user_info, friends, followers, queue] = simplejson.loads(bakfile.read())
        print str(len(friends)) + " friends!"
        bakfile.close()
        print "Loaded " + str(len(history)) + " previous Twitterers!"
        print "The current queue size is " + str(len(queue)) + "."
    else:
        print "You are about to overwrite the partial data; are you sure? (y/n) ",
        resume = re.compile(r"\n").sub("", raw_input())
        if not (resume == "y" or resume == "Y" or resume == "yes" or resume == "Yes" or resume == "YES"):
            exit

while len(queue) > 0 and calls + 3 <= max_calls:
    next_user = queue.pop(0)
    # Let's just double-check that we haven't already processed this user!
    if str(next_user) in history:
        continue
    update_status(str(next_user) + "\t(? Followers,\t? Following)\tQueue Size: " + str(len(queue)))
    if next_user in user_info:
        info = user_info[next_user]
    else:
        try:
            info = get_user_info(next_user)
        except urllib2.HTTPError:
            update_status("It appears as if user " + str(next_user) + "'s account has been suspended!")
            print ""
            clear_status()
            continue
    uid = next_user
    if is_username:
        uid = info['id']
        history[uid] = True
        is_username = False
    user_info[uid] = info
    update_status(info['screen_name'] + "\t(? Followers,\t? Following)\tQueue Size: " + str(len(queue)))
    followers[uid] = get_followers(uid)
    for i in followers[uid]:
        if str(i) not in history:
            history[i] = True
            queue.append(i)
    update_status(info['screen_name'] + "\t(" + str(len(followers[uid])) + " Followers,\t? Following)\tQueue Size: " + str(len(queue)))
    friends[uid] = get_friends(uid)
    for i in friends[uid]:
        if str(i) not in history:
            history[i] = True
            queue.append(i)
    update_status(info['screen_name'] + "\t(" + str(len(followers[uid])) + " Followers,\t" + str(len(friends[uid])) + " Following)")
    clear_status()
    sys.stdout.write("\n")
    sys.stdout.flush()
    save_state()

# Get some extra user info if we have any API calls remaining
# Find someone in the history for whom we haven't downloaded user info
for user in history:
    if calls >= max_calls:
        break
    if not user in user_info:
        try:
            user_info[user] = get_user_info(user)
        except urllib2.HTTPError:
            # This almost always means the user's account has been disabled!
            continue

if calls > 0:
    save_state()

# Now download any user profile pictures that we might be missing...
update_status("Downloading missing user profile pictures...")
if not os.path.isdir(username + ".images"):
    os.mkdir(username + ".images")
user_image_raw = {}
for u in friends:
    _, _, filetype = user_info[u]['profile_image_url'].rpartition(".")
    filename = username + ".images/" + str(u) + "." + filetype
    user_image_raw[u] = filename
    if not os.path.isfile(filename):
        # we need to download the file!
        update_status("Downloading missing user profile picture for " + user_info[u]['screen_name'] + "...")
        urllib.urlretrieve(user_info[u]['profile_image_url'], filename)
update_status("Profile pictures are up to date!")
print ""
clear_status()

# Now scale the profile pictures
update_status("Scaling profile pictures...")
user_image = {}
for u in friends:
    _, _, filetype = user_info[u]['profile_image_url'].rpartition(".")
    filename = username + ".images/" + str(u) + ".scaled." + filetype
    user_image[u] = filename
    if not os.path.isfile(filename):
        # we need to scale the image!
        update_status("Scaling profile picture for " + user_info[u]['screen_name'] + "...")
        os.system("convert -resize 48x48 " + user_image_raw[u] + " " + user_image[u])
update_status("Profile pictures are all scaled!")
print ""
clear_status()

update_status("Building the adjacency matrix...")
[idxes, adj] = build_adjacency()
print ""
clear_status()
update_status("Calculating the stationary distribution...")
iterations = 500
damping_factor = 0.25
st = [1.0]*len(friends)
last_percent = -1
for i in range(iterations):
    users = 0
    for u in friends:
        users += 1
        percent = round(float(i * len(friends) + users) / float(iterations * len(friends)) * 100.0, 1)
        if percent > last_percent:
            last_percent = percent
            update_status("Calculating the stationary distribution... " + str(percent) + "%")
        idx = idxes[str(u)]
        given_away = 0.0
        give_away = st[idx] * (1.0 - damping_factor)
        if give_away <= 0.0:
            continue
        for f in friends[u]:
            if str(f) not in friends:
                continue
            fidx = idxes[str(f)]
            ga = adj[idx][fidx] * give_away
            given_away += ga
            st[fidx] += ga
        st[idx] -= given_away
print ""
clear_status()
# Now calculate the ranks of the users
deco = [ (st[idxes[u]], i, u) for i, u in enumerate(friends.keys()) ]
deco.sort()
deco.reverse()
rank = {}
last_st = None
last_rank = 1
for st, _, u in deco:
    if last_st == None:
        rank[u] = 1
    elif st == last_st:
        rank[u] = last_rank
    else:
        rank[u] = last_rank + 1
    last_rank = rank[u]
    last_st = st
    print user_info[u]['screen_name'] + "\t" + str(rank[u])

update_status("Generating the .dot file...")

# Now generate the .dot file
dotfile.write("digraph twitter {\n")
dotfile.write("  /* A TwitterGraph automatically generated by Evan Sultanik's Python script! */\n")
dotfile.write("  /* http://www.sultanik.com/                                                 */\n")
for user in friends:
    dotfile.write("  n" + str(user) + " [label=< ")
    dotfile.write("")
    dotfile.write("" + user_info[user]['name'])
    if not (user_info[user]['name'] == user_info[user]['screen_name']):
        dotfile.write("
(" + user_info[user]['screen_name'] + ")")
    dotfile.write("
Rank: " + str(rank[user]) + "
 >");
    if user_info[user]['screen_name'] == username:
        dotfile.write(" color=\"green\" shape=\"doubleoctagon\"")
    dotfile.write("];\n")
dotfile.write("\n")
for user in friends:
    for f in friends[user]:
        if str(f) in friends:
            dotfile.write("  n" + str(user) + " -> " + " n" + str(f) + ";\n")
dotfile.write("}\n")

dotfile.close()

print ""
clear_status()

אליהו א. סולטניק, Ph.D.

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