get_exchange_from_filename {RITCH}

Returns the exchange from an ITCH-filename

Description

Returns the exchange from an ITCH-filename

Usage

get_exchange_from_filename(file)

Arguments

file

a filename

Value

The exchange

Examples

get_exchange_from_filename("03302017.NASDAQ_ITCH50")
get_exchange_from_filename("20170130.BX_ITCH_50.gz")
get_exchange_from_filename("S030220-v50-bx.txt.gz")
get_exchange_from_filename("Unknown_file_format")