IPython

ipython.rst

Installation

Basic Concepts

>>> a = 1
# What's the difference between the following operations?
In [1]: print a
In [2]: a

While the outlook values look preety much the same, there is a difference. The print statements use the "unofficial" string representation, while the bare value variable names use the "official" string representation.

>>> import datetime
>>> t = datetime.datetime.now()
In [1]: print t
In [2]: t

class DoubleRep(object):

def __str__(self):

return "Hi, I'm a __str__"

def __repr__(self):

return "Hi, I'm a __repr__"

The standard Python prompt is >>>, whereas the IPython prompt consists of the word "In," followed by a number in brackets, floowed by a colon.

In [3]: print In In [4]: print Out

In [5]: type(In) In [6]: type(Out)

In is an IPython input list object and Out is a dict object. They, respectively, hold the input that you typed in and the output that none-None statements and expressions evaluated to.

Tab Completion

>>> import rlcompleter, readline
>>> readline.parse_and_bind('tab: complete')

>>> import os
>>> os.list<TAB>
>>> os.ls<TAB><TAB>

Configuring IPython

.ipython/ipy_user_conf.py

Help with Magic Functions

In [1]: lsmagic In [2]: %<TAB> In [3]: %page ?

Unix Shell

alias

In [1]: alias nss netstat -lptn

Shell Execute

In [1]: user = 'marr' In [2]: process = 'bash' In [3]: !ps aux | grep $user | grep $process In [4]: l = !ps aux | grep $user | grep $process

rehash

rehashx

cd

Information Gathering

page

pdef

pdoc

pfile

pinfo

psource

psearch

Automation and Shortcuts

macro

store

reset

run

save

rep

kind: ConfigMap apiVersion: v1 metadata:

name: elasticsearch-config-csc

data:

elasticsearch.yml: |

cluster.name: "docker-cluster" network.host: 0.0.0.0 xpack.license.self_generated.type: trial xpack.monitoring.collection.enabled: true

kind: Deployment apiVersion: apps/v1 metadata:

name: csc-elasticsearch

spec:

replicas: 1 selector:

matchLabels:

app: csc-elasticsearch

template:

metadata:

labels:

app: csc-elasticsearch

spec:

volumes:

• name: config configMap:

  name: elasticsearch-config-csc defaultMode: 420

initContainers:

• name: increase-vm-max-map image: busybox command:

  • sysctl
  • '-w'
  • vm.max_map_count=262144

  securityContext:

  privileged: true

containers:

• name: csc-elasticsearch image: 'docker.elastic.co/elasticsearch/elasticsearch:7.15.2' ports:

  • containerPort: 9200 protocol: TCP
  • containerPort: 9300 protocol: TCP

  env:

  • name: ES_JAVA_OPTS value: '-Xms512m -Xmx512m'
  • name: discovery.type value: single-node

  volumeMounts:

  • name: config mountPath: /usr/share/elasticsearch/config/elasticsearch.yml subPath: elasticsearch.yml

kind: Service apiVersion: v1 metadata:

name: csc-elasticsearch

spec:

ports:

• name: csc-elasticsearch protocol: TCP port: 80 targetPort: 9200

selector:

app: csc-elasticsearch

type: ClusterIP sessionAffinity: None