Re: [libvirt] [libvirt-test-api][PATCH 1/3] introduce 2 functions in utils

It's OK to me, please hongming help review it again. BR, Jianwei ----- Original Message ----- From: "Luyao Huang" <lhuang(a)redhat.com&gt; To: libvir-list(a)redhat.com Cc: "Luyao Huang" <lhuang(a)redhat.com&gt; Sent: Wednesday, April 22, 2015 9:00:55 PM Subject: [libvirt] [libvirt-test-api][PATCH 1/3] introduce 2 functions in utils get_standard_deviation() is to get Standard Deviation, and param_to_tuple_nolength() allow do not pass lengh when use param_to_tuple(). Signed-off-by: Luyao Huang <lhuang(a)redhat.com&gt; --- utils/utils.py | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) diff --git a/utils/utils.py b/utils/utils.py index c3e46f6..954b2bf 100644 --- a/utils/utils.py +++ b/utils/utils.py @@ -31,6 +31,7 @@ import string import subprocess import hashlib import libvirt +import math from xml.dom import minidom from urlparse import urlparse @@ -896,3 +897,30 @@ def validate_remote_blk_type(hostname, username, password, else: logger.info("lspci and lsmod return nothing") return 1 + +def get_standard_deviation(cb1, cb2, opaque1, opaque2, number = 1000): + """ pass two callback functions and opaque return Standard Deviation, + this function will be useful when need equal some quick change + value (like memory, cputime), default loop times are 1000, + and notice callback functions cb1 and cb2 should allways success + """ + D = 0 + for i in range(number): + a = cb1(opaque1) + b = cb2(opaque2) + D += (int(a) - int(b))**2 + return math.sqrt(D/number) + +def param_to_tuple_nolength(paramlist): + """paramlist contains numbers which can be divided by '-', '^' and + ',', return tuple only have True or False value + """ + d = [] + a = paramlist.split(',') + for i in range(len(a)): + if a[i].find('^') >= 0: + continue + d += a[i].split('-') + lengh = max(d) + + return param_to_tuple(paramlist, int(lengh) + 1)