pmav99

Some functions for helping timing stuff.

Note: The best timer is platform dependent. So always use from timeit import default_timer.

Other approaches

• https://bitbucket.org/haypo/misc/src/tip/python/benchmark.py

Custom Timers

pmav99

#!/usr/bin/env python
# -*- coding: utf-8 -*-
# author: Panagiotis Mavrogiorgos
# email: gmail, pmav99

"""
A help class for generating bootstrap tables.
"""

from __future__ import division

pmav99

[Event "Let's Play!"]
[Site "Chess.com"]
[Date "2015.02.18"]
[Round "?"]
[White "pmav99"]
[Black "RedPawn81"]
[Result "*"]
[WhiteElo "1913"]
[BlackElo "1564"]
[TimeControl "1 in 5 days"]

pmav99

def nearly_equal(a, b, epsilon):
    """
    Return `True` if the "difference" between `a` and `b` is smaller than `epsilon`, `False` otherwise.
    This function tries to solve the problem of float comparison in a way that handles all cases
    (i.e. comparing floats with `inf`, `nan` etc).
    Do take note that when the difference between `a` and `b` is "equal" to `epsilon` then the
    results may not be what you expect them to be...  For example::
        a = 1
        b = a + 1e-7
        epsilon = 1e-7

pmav99

def von_mises(S11, S22, S12, fc, ft):
    """
    Returns the type of failure according to the modified Von Mises
    failure criterion.

    Input
    -----
    S11 : float
        Normal stresses (σx)
    S22 : float

pmav99

Tested under zsh, should work under bash too.

1. Install virtualenv & virtualenvwrapper. Depends on the distribution.

2. Put in .zshrc (.bashrc if you use bash):

   # Virtualenvs
   if which virtualenvwrapper.sh &> /dev/null; then
       mkdir -p $HOME/Prog

export WORKON_HOME=$HOME/.virtualenvs

pmav99

.PHONY: list
list:
	@$(MAKE) -pRrq -f $(lastword $(MAKEFILE_LIST)) : 2>/dev/null | awk -v RS= -F: '/^# File/,/^# Finished Make data base/ {if ($$1 !~ "^[#.]") {print $$1}}' | sort | egrep -v -e '^[^[:alnum:]]' -e '^$@$$' | xargs

pmav99

# first cell

import os
import glob
import locale

import numpy as np
import pandas as pd
from IPython.core.interactiveshell import InteractiveShell

pmav99

This script is similar to:

ag pattern -l | xargs sed -i 's;pattern;replace;g'

with the added benefit that you can use proper regular expressions (e.g. grouping, lookaheads etc which are not supported on sed...).

Since ag is being used for searching the files, performance shouldn't be too bad (especially on SSDs).

pmav99

#!/bin/bash 

# an extract command
x() {
    local c e i

    (($#)) || return

    for i; do
        c=''