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# To create a conda environment:
conda create --name <environment-name> python=<version:2.7/3.5>

# To create a requirements.txt file:
conda list
conda list -e > requirements.txt 

# To export environment to a file:
activate <environment-name>
conda env export > <environment-name>.yml

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Common Options

-#, --progress-bar Make curl display a simple progress bar instead of the more informational standard meter.

-b, --cookie <name=data> Supply cookie with request. If no =, then specifies the cookie file to use (see -c).

-c, --cookie-jar <file name> File to save response cookies to.

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# Put this in an S3 bucket and invoke it like this:
# https://us-east-1.console.aws.amazon.com/cloudformation/home?region=us-east-1#/stacks/create/review?templateURL=https://s3.amazonaws.com/yourbucketname/BillingAlerts.yml&stackName=My-Billing-Alarms
AWSTemplateFormatVersion: 2010-09-09
Description: 'Billing Alerts for AWS Account'

Parameters:

  EmailAddress:
    Type: String
    Description: "Enter email address for billing alerts"

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BaseException
 +-- SystemExit
 +-- KeyboardInterrupt
 +-- GeneratorExit
 +-- Exception
      +-- StopIteration
      +-- StopAsyncIteration
      +-- ArithmeticError
      |    +-- FloatingPointError
      |    +-- OverflowError

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import numpy as np


def l2_norm(vec):
    return np.sqrt(np.square(vec).sum())


def test_l2_norm():
    for _ in range(1000):
        ref = np.random.rand(100, 1)

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#!/bin/bash
role_name=`curl -s http://169.254.169.254/latest/meta-data/iam/security-credentials/`
creds=`curl -s http://169.254.169.254/latest/meta-data/iam/security-credentials/$role_name`
current_region=`curl -s http://169.254.169.254/latest/dynamic/instance-identity/document | jq -c -r .region`

export AWS_ACCESS_KEY_ID=`printf "%s" "$creds" | jq -r .AccessKeyId`
export AWS_SECRET_ACCESS_KEY=`printf "%s" "$creds" | jq -r .SecretAccessKey`
export AWS_SESSION_TOKEN=`printf "%s" "$creds" | jq -r .Token`
export AWS_DEFAULT_REGION=$current_region

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Create Root CA (Done once)

Create Root Key

Attention: this is the key used to sign the certificate requests, anyone holding this can sign certificates on your behalf. So keep it in a safe place!

openssl genrsa -des3 -out rootCA.key 4096

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Proxy through a bastion host

On local machine

Generate an ssh key:

ssh-keygen -t ed25519 -f bastion -C "" -N ""

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import matplotlib.pyplot as plt

plt.rcParams["figure.figsize"] = (20,10)

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# Summary statistics for numeric variables
df.describe().transpose()

# Summary statistics for categorical/string variables
df.describe(include=['O']).transpose()

# Info about column names, datatypes, and null values
df.info()

# Get a sample