Unicode list to integer ; R -

one of variables in data frame unicode (all cases numbers).

head(total$page) [u'0'] [u'0'] [u'6'] [u'1'] [u'2'] 

how convert integers, that:

head(total$page) 0, 0, 6, 1, 2 

thanks.

edit. dput:

dput(head(total$page)) structure(c(1l, 1l, 36l, 2l, 13l, 4l), .label = c("[u'0']", "[u'1']",  "[u'10']", "[u'11']", "[u'12']", "[u'13']", "[u'14']", "[u'15']",  "[u'16']", "[u'17']", "[u'18']", "[u'19']", "[u'2']", "[u'20']",  "[u'21']", "[u'22']", "[u'23']", "[u'24']", "[u'25']", "[u'26']",  "[u'27']", "[u'28']", "[u'29']", "[u'3']", "[u'30']", "[u'31']",  "[u'32']", "[u'33']", "[u'34']", "[u'35']", "[u'37']", "[u'38']",  "[u'39']", "[u'4']", "[u'5']", "[u'6']", "[u'67']", "[u'7']",  "[u'8']", "[u'9']", "[]", "[u'36']", "[u'40']", "[u'41']", "[u'42']",  "[u'43']", "[u'44']"), class = "factor")