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import socket
import sys
import argparse
#readline is under GPL licensing
#import readline
def recvall(s, n):
buf=s.recv(n)
ret=len(buf)
while ret>0 and len(buf)<n:
if buf[-1]=='\n': break
tmp=s.recv(n)
ret=len(tmp)
buf=buf+tmp
return buf
def _find_getch():
try:
import Carbon # try OS/X
Carbon.Evt # unix doesn't have this
def _getch():
if Carbon.Evt.EventAvail(0x0008)[0]==0: # 0x0008 is the keyDownMask
return ''
else:
(what,msg,when,where,mod)=Carbon.Evt.GetNextEvent(0x0008)[1]
ch = chr(msg & 0x000000FF)
if ord(ch) == 3:
raise Exception("control-c")
return ch
return _getch()
except:
pass
try:
import msvcrt # try windows
def _getch():
ch = msvcrt.getch
if ord(ch) == 3:
raise Exception("control-c")
return ch
except:
pass
# POSIX system. Create and return a getch that manipulates the tty.
try:
import sys, tty, termios
def _getch():
fd = sys.stdin.fileno()
old_settings = termios.tcgetattr(fd)
try:
tty.setraw(fd)
ch = sys.stdin.read(1)
finally:
termios.tcsetattr(fd, termios.TCSADRAIN, old_settings)
if ord(ch) == 3:
raise Exception("control-c")
return ch
return _getch
except:
pass
return lambda: raw_input('')
def get_label(example,minus1,i,tag,pred, input_fn=raw_input):
print '\nrequest for example %d: tag="%s", prediction=%g: %s'%(i,tag,pred,example)
while True:
label=input_fn('Provide? [0/1/skip]: ')
if label == '1':
break
if label == '0':
if minus1: label='-1'
break
if 0 < len(label) <= len('skip') and 'skip'.startswith(label):
label = None
break
return label
parser = argparse.ArgumentParser(description="interact with VW in active learning mode")
parser.add_argument("-s","--seed", help="seed labeled dataset")
parser.add_argument("-o","--output", help="output file")
parser.add_argument("-u","--human", help="human readable examples in this file (same # of lines as unlabeled); use with -v")
parser.add_argument("-v","--verbose", action="store_true", help="show example (in addition to tag)")
parser.add_argument("-m","--minus1", action="store_true", help="interpret 0 as -1")
parser.add_argument("-k","--keypress", action="store_true", help="don't require 'Enter' after keypresses")
parser.add_argument("host", help="the machine VW is running on")
parser.add_argument("port", type=int, help="the port VW is listening on")
parser.add_argument("unlabeled_dataset", help="file with unlabeled data")
args = parser.parse_args()
input_fn = raw_input
if args.keypress:
getch = _find_getch()
def raw_input_keypress(str):
print str,
return getch()
input_fn = raw_input_keypress
seed=None
if args.seed is not None:
try:
seed=open(args.seed,'r')
except:
print 'Warning: could not read from %s'%args.seed
pass
try:
unlabeled=open(args.unlabeled_dataset,'r')
except:
print 'Error: could not read from %s'%args.unlabeled_dataset
exit(1)
human=None
if args.human is not None:
try:
human = open(args.human, 'r')
except:
print 'Warning: could not read human examples from %s' % args.human
pass
output=None
if args.output is not None:
try:
output=open(args.output,'w')
except:
print 'Warning: could not write to %s'%args.output
pass
# Create a socket
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
queries=0
try:
# Connect to server and perform handshake
print 'connecting to %s:%d ...'%(args.host,args.port)
sock.connect((args.host, args.port))
print 'done'
# Send seed dataset
if seed:
print 'seeding vw ...'
for line in seed:
sock.sendall(line)
recvall(sock, 256)
print 'done'
# Send unlabeled dataset
print 'sending unlabeled examples ...'
for i,line in enumerate(unlabeled):
humanString = line
if human is not None:
try:
humanString = human.next()
except:
print 'Warning: out of lines in human data, reverting to vw strings'
humanString = None
sock.sendall(line)
print 'sending unlabeled '+repr(line[:20])
response=recvall(sock, 256)
#print 'unlabeled response '+repr(response)
responselist=response.split(' ')
if len(responselist)==2:
#VW does not care about this label
continue
prediction,tag,importance=responselist
try:
imp=float(importance)
except:
continue
queries+=1
label=get_label(humanString if args.verbose else '\n', args.minus1, i, tag, float(prediction), input_fn)
if label is None:
continue
front,rest=line.split('|',1)
if tag=='':
tag="'empty"
labeled_example=label+' '+"%g"%imp+' '+tag+' |'+rest
#print 'sending labeled '+repr(labeled_example[:20])
sock.sendall(labeled_example)
if output:
output.write(labeled_example)
output.flush()
recvall(sock, 256)
finally:
sock.close()
unlabeled.close()
if output:
output.close()
if seed:
seed.close()
if human:
human.close()
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