import json,sys, linecache
from pprint import pprint

def jsonExtract(file):
    with open(file) as data_file:
        data = json.load(data_file)
    for i in data['projects']:
        keyList = i.keys()
        pprint(keyList)
        #print keyList['category']
        for j in i.keys():
            if isinstance(i[str(j)],dict):
                print str(i[str(j)].keys())
if __name__ == '__main__':
    try:
        print "pre exec"
        jsonExtract('webContent.json')
        print "executed"
    except TypeError as e:
        printException()
        print "Something went wrong:...",e,"...on line",str(sys.exc_info()[2].tb_lineno)
def printException():
    exc_type, exc_obj, tb = sys.exc_info()
    f = tb.tb_frame
    lineno = tb.tb_lineno
    filename = str(f.f_code)
    linecache.checkcache(filename)
    line = linecache.getline(filename, lineno, f.f_globals)
    print 'EXCEPTION IN ({}, LINE {} "{}"): {}'.format(filename, lineno, line.strip(), exc_obj)