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from time import strptime, strftime

d = "2013-08-12"

oldFormat = "%Y-%m-%d"
newFormat = "%d-%b-%Y"
oldDate = strptime(d, oldFormat)

# print oldDate
# print strftime(newFormat, oldDate).upper()

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# jupyter notebook --no-browser --ip=0.0.0.0
from IPython.core.interactiveshell import InteractiveShell
InteractiveShell.ast_node_interactivity = "all"

%matplotlib inline
%config InlineBackend.figure_format = 'retina'

import numpy as np
import matplotlib.pyplot as plt
import pandas as pd

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# set java

sudo yum -y update
sudo yum -y install java-1.8.0-openjdk-devel
sudo update-alternatives --config java
sudo update-alternatives --config javac



sudo yum -y update

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export FORMAT="ID\t{{.ID}}\nNAME\t{{.Names}}\nIMAGE\t{{.Image}}\nPORTS\t{{.Ports}}\nCOMMAND\t{{.Command}}\nCREATED\t{{.CreatedAt}}\nSTATUS\t{{.Status}}\n"

// usage:
docker ps --format="$FORMAT"

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#!/bin/sh

# setup nvm node yarn on aws cloud9
set -e

cd ~/.nvm
git init
git remote add origin https://github.com/creationix/nvm.git
rm nvm-exec nvm.sh

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# eeg_to_spectrogram

# steps

# 1. read eeg with pyedflib
# 2. convert eeg signal to spectrogram using matplotlib
# 3. remove unneccesary staff from matplotlib
# 4. save a pure spectrogram image for further analysis or 
# machine learning image classification task

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# list available subtitles
# https://superuser.com/questions/927523/how-to-download-only-subtitles-of-videos-using-youtube-dl
youtube-dl --list-subs https://www.youtube.com/watch?v=lmWh9jV_1ac

# download a particular subtitle
youtube-dl --write-sub --sub-lang zh-CN --skip-download https://www.youtube.com/watch\?v\=lmWh9jV_1ac

# download auto generated sub
youtube-dl --write-auto-sub --sub-lang zh-CN --skip-download https://www.youtube.com/watch\?v\=lmWh9jV_1ac

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A problem is divided into a subproblem, each problem has size n/b
and combine these answers in O(n^d) time.

If T(n) = aT(ceiling(n/b)) + O(n^d) for some constant 

a > 0, b > 1, and d >= 0, then

T(n) = O(n^d) if d > log_b a
T(n) = O(n^d log n) if d = log_b a

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sudo apt-get update

sudo apt-get -y install binutils

git clone https://github.com/aws/efs-utils

cd efs-utils

./build-deb.sh

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def fibR(n):
    """recursive fib"""
    if n == 0:
        return 0
    if n == 1:
        return 1
    return fibR(n-1) + fibR(n-2)
fibR(25)