pyspark
import json
json.loads(pclick_samples[0]).keys()
# Out[223]: [u'timestamp', u'logger', u'data', u'appVersion', u'level']
#
for i in pclick_samples[0:5]:
print json.loads(i)['data']['pclick']
# 0.00533626494896
# 0.00451090461716
# 0.00265758681441
# 0.00276519885403
# 0.0079531881466