1. Introduction to Programming

Learn Python: Syntax, function

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2.Development Skills

Navigation

using the command line by learning how to navigate directories and files

• $ : shell prompt.

• root directory : first directory in the filesystem

commands :

• $ ls : lists” the files and folders inside it
• $ pwd : print working directory
• $ cd : change directory
• $ cd .. : move up one directory
• cd ../../../
• $ cd ../dir_name : change dir to dir_name
• $ mkdir dir_name : new dir
• $ touch filename.filetype creates a new file inside the working directory
  touch media/popular.txt

setup

Bash

Bourne-Again SHell : one of Command Line Interfaces (CLIs)

to use Bash in window: install Git Bash

Basic git Workflow

Git

: a software that allows you to keep track of changes made to a project over time.

git commands

• git init : start new git project
• git status
• git add filename :
• git diff filename :
• q : exit
• git commint -m
• git log

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3. Flow, Data, and Iteration

4

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5

Modules

Three different ways to import modules:

# First way
import module
module.function()

# Second way
from module import function
function()

# Third way
from module import *
function()

import filename 로 파일 import 가능. 그럼 파일 안에 함수 사용 가능.

random module

import random

# random int from given range
random.randint(start, end)

#random element from a sequence
random.choice(seq)

Dictionary

my_dictionary = {"song": "Estranged", "artist": "Guns N' Roses", key : value}
my_dictionary["song"] = "Paradise City"

• merging dics
  dict1.update(dict2)

• accession methods

ex_dict.keys()
ex_dict.values()
ex_dict.items() : tuple로 keys, values

• .get()

dic.get("key", "if None: return this"optional)

• .pop() :remove key-value pairs

dic.pop('key')

class

• .__init__() : called every time the class is instantiated

• repr() : tell Python what the string representation of the class should be

class Employee:
  def __init__(self, name):
    self.name = name

  def __repr__(self):
    return self.name
    

# Dog class
class Dog:
  # Method of the class
  def bark(self):
    print("Ham-Ham")

# Create a new instance
charlie = Dog()

# Call the method
charlie.bark()
# This will output "Ham-Ham"

• class variables instance.variable

class my_class:
  class_variable = "I am a Class Variable!"
  
x = my_class()
print(x.class_variable) #I am a Class Variable!

• __main__ identifier used to reference the current file context