How to print symbols in the zipline bundle

print_bundle_symbols.py

# HOW TO PRINT BUNDLE SYMBOLS

import os
from pandas import Timestamp
from zipline.data.bundles import load

now = Timestamp.utcnow()
bundle = load('US_stock_bundle', os.environ, now)
symbols = set(str(asset.symbol) 
              for asset in bundle.asset_finder.retrieve_all(
                           bundle.asset_finder.equities_sids))

print(symbols)