def double_sha256(hex_string):
    return sha256(sha256(safe_from_hex(hex_string)).digest()).hexdigest()
Attempts to open the given files using the preferred native viewer or editor.
dataset/ETHPy150Open blockcypher/blockcypher-python/blockcypher/utils.py/double_sha256--crossover with--dataset/ETHPy150Open pantsbuild/pants/src/python/pants/binaries/binary_util.py/ui_open