From 29b656f14d8bb7622ff861208d26cf8eb018670d Mon Sep 17 00:00:00 2001 From: John Estabrook Date: Tue, 25 Oct 2022 13:42:30 -0500 Subject: vyos.util: T4773: add camel_to_snake_case conversion --- python/vyos/util.py | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'python/vyos/util.py') diff --git a/python/vyos/util.py b/python/vyos/util.py index 461df9a6e..e4e2a44ec 100644 --- a/python/vyos/util.py +++ b/python/vyos/util.py @@ -1105,3 +1105,10 @@ def sysctl_write(name, value): call(f'sysctl -wq {name}={value}') return True return False + +# approach follows a discussion in: +# https://stackoverflow.com/questions/1175208/elegant-python-function-to-convert-camelcase-to-snake-case +def camel_to_snake_case(name: str) -> str: + pattern = r'\d+|[A-Z]?[a-z]+|\W|[A-Z]{2,}(?=[A-Z][a-z]|\d|\W|$)' + words = re.findall(pattern, name) + return '_'.join(map(str.lower, words)) -- cgit v1.2.3 From 3f75a38abe3e97ff243d01931a4defe8f4eef98a Mon Sep 17 00:00:00 2001 From: Daniil Baturin Date: Fri, 28 Oct 2022 10:38:26 -0400 Subject: T4779: add vyos.util.human_to_bytes --- python/vyos/util.py | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) (limited to 'python/vyos/util.py') diff --git a/python/vyos/util.py b/python/vyos/util.py index e4e2a44ec..a80584c5a 100644 --- a/python/vyos/util.py +++ b/python/vyos/util.py @@ -574,6 +574,37 @@ def bytes_to_human(bytes, initial_exponent=0): size_string = "{0:.2f} {1}".format(value, suffix) return size_string +def human_to_bytes(value): + """ Converts a data amount with a unit suffix to bytes, like 2K to 2048 """ + + from re import match as re_match + + res = re_match(r'^\s*(\d+(?:\.\d+)?)\s*([a-zA-Z]+)\s*$', value) + + if not res: + raise ValueError(f"'{value}' is not a valid data amount") + else: + amount = float(res.group(1)) + unit = res.group(2).lower() + + if unit == 'b': + res = amount + elif (unit == 'k') or (unit == 'kb'): + res = amount * 1024 + elif (unit == 'm') or (unit == 'mb'): + res = amount * 1024**2 + elif (unit == 'g') or (unit == 'gb'): + res = amount * 1024**3 + elif (unit == 't') or (unit == 'tb'): + res = amount * 1024**4 + else: + raise ValueError(f"Unsupported data unit '{unit}'") + + # There cannot be fractional bytes, so we convert them to integer. + # However, truncating causes problems with conversion back to human unit, + # so we round instead -- that seems to work well enough. + return round(res) + def get_cfg_group_id(): from grp import getgrnam from vyos.defaults import cfg_group -- cgit v1.2.3 From c29f1be7372de3cb68937d01a5c3e793e1881b03 Mon Sep 17 00:00:00 2001 From: John Estabrook Date: Wed, 16 Nov 2022 08:41:23 -0600 Subject: firewall: T4821: add utility to load script as module --- python/vyos/util.py | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'python/vyos/util.py') diff --git a/python/vyos/util.py b/python/vyos/util.py index a80584c5a..9ebe69b6c 100644 --- a/python/vyos/util.py +++ b/python/vyos/util.py @@ -1143,3 +1143,11 @@ def camel_to_snake_case(name: str) -> str: pattern = r'\d+|[A-Z]?[a-z]+|\W|[A-Z]{2,}(?=[A-Z][a-z]|\d|\W|$)' words = re.findall(pattern, name) return '_'.join(map(str.lower, words)) + +def load_as_module(name: str, path: str): + import importlib.util + + spec = importlib.util.spec_from_file_location(name, path) + mod = importlib.util.module_from_spec(spec) + spec.loader.exec_module(mod) + return mod -- cgit v1.2.3 From 336576bf58a48216d7c8719b97d1204468fda018 Mon Sep 17 00:00:00 2001 From: John Estabrook Date: Tue, 6 Dec 2022 09:06:47 -0600 Subject: vyos.util: T4770: add precision arg, fix typo in bytes_to_human This is useful in general, but we will add in this context to replace the use of 'bytes2HR' in show_openvpn.py with util.bytes_to_human, while maintaining compatability with original precision=1. --- python/vyos/util.py | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) (limited to 'python/vyos/util.py') diff --git a/python/vyos/util.py b/python/vyos/util.py index 9ebe69b6c..6a828c0ac 100644 --- a/python/vyos/util.py +++ b/python/vyos/util.py @@ -539,13 +539,16 @@ def seconds_to_human(s, separator=""): return result -def bytes_to_human(bytes, initial_exponent=0): +def bytes_to_human(bytes, initial_exponent=0, precision=2): """ Converts a value in bytes to a human-readable size string like 640 KB The initial_exponent parameter is the exponent of 2, e.g. 10 (1024) for kilobytes, 20 (1024 * 1024) for megabytes. """ + if bytes == 0: + return "0 B" + from math import log2 bytes = bytes * (2**initial_exponent) @@ -571,7 +574,7 @@ def bytes_to_human(bytes, initial_exponent=0): # Add a new case when the first machine with petabyte RAM # hits the market. - size_string = "{0:.2f} {1}".format(value, suffix) + size_string = "{0:.{1}f} {2}".format(value, precision, suffix) return size_string def human_to_bytes(value): -- cgit v1.2.3