51 lines
2 KiB
Python
51 lines
2 KiB
Python
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import re
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import time
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# A regular expression which separates the interesting fields and saves them in named groups
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regexp = r"""
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\s* # a interface line starts with none, one or more whitespaces
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(?P<interface>\w+):\s+ # the name of the interface followed by a colon and spaces
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(?P<rx_bytes>\d+)\s+ # the number of received bytes and one or more whitespaces
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(?P<rx_packets>\d+)\s+ # the number of received packets and one or more whitespaces
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(?P<rx_errors>\d+)\s+ # the number of receive errors and one or more whitespaces
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(?P<rx_drop>\d+)\s+ # the number of dropped rx packets and ...
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(?P<rx_fifo>\d+)\s+ # rx fifo
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(?P<rx_frame>\d+)\s+ # rx frame
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(?P<rx_compr>\d+)\s+ # rx compressed
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(?P<rx_multicast>\d+)\s+ # rx multicast
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(?P<tx_bytes>\d+)\s+ # the number of transmitted bytes and one or more whitespaces
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(?P<tx_packets>\d+)\s+ # the number of transmitted packets and one or more whitespaces
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(?P<tx_errors>\d+)\s+ # the number of transmit errors and one or more whitespaces
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(?P<tx_drop>\d+)\s+ # the number of dropped tx packets and ...
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(?P<tx_fifo>\d+)\s+ # tx fifo
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(?P<tx_frame>\d+)\s+ # tx frame
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(?P<tx_compr>\d+)\s+ # tx compressed
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(?P<tx_multicast>\d+)\s* # tx multicast
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"""
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pattern = re.compile(regexp, re.VERBOSE)
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def get_bytes(interface_name):
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'''returns tuple of (rx_bytes, tx_bytes) '''
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with open('/proc/net/dev', 'r') as f:
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a = f.readline()
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while(a):
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m = pattern.search(a)
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# the regexp matched
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# look for the needed interface and return the rx_bytes and tx_bytes
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if m:
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if m.group('interface') == interface_name:
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return (m.group('rx_bytes'),m.group('tx_bytes'))
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a = f.readline()
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while True:
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last_time = time.time()
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last_bytes = get_bytes('wlxa4db303b745e')
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time.sleep(1)
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now_bytes = get_bytes('wlxa4db303b745e')
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print("rx: {} B/s, tx {} B/s".format(int(now_bytes[0]) - int(last_bytes[0]), int(now_bytes[1]) - int(last_bytes[1])))
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