Python

Table of Contents

• Basics
• Useful Libraries
  • sys
  • os
  • math
  • datetime
  • pickle
  • argparse
  • re
• Working with data
  • numpy
  • pandas
  • matplotlib
  • plotly
• Machine Learning
  • scikit learn
  • pytorch
  • data science

Nomenclature of symbols

• () — parantheses
• [] — brackets
• {} — braces
• ``
• ""

Get Python

• CPython

Python 2 (legacy version)

python

Python 3

python3

current version: 3.7.x

macOS Installation

• brew.sh
• python.org/downloads

Python documentation

help(type)
help(print)

• type Ctrl + D to quit

dir(type/variable)
dir("")		# returns all keywords, functions in python

type?
type(my_variable)

IPython

run file from within ipython

%run root-hist.py

save commands to file

save {file-name} {line-numbers}

Python snippets

Make dictionary out of two lists

a_dict = dict(zip(key_list, value_list)) 

zip takes iterables, aggregates them in a tuple, and returns an iterator of tuples