fheutz / 100daychallenge-python

the 100Days Challenge for Python

100dayspython

100 Days Coding Challange with Python

Day 1 Installation

Installation

• Python 3.7.3
• VS-Code python Addon (ms-python.python)
• python -m pip install --upgrade pip #upgrade PIP in this case 19.0.3

Content

Hello world and simple String processing! I took Hello World and played with it. Towards the end i found out about the .format() function, which offered a lot of tools for manipulating Strings

Sources

pyformat.info pythonforbeginners.com

TODOs

Findout what the ** means (line 3)

formString = "{last} {first}"
data = {"first": "cool!", "last": "you are"}
print ( formString.format(**data) ) 

Read Files and apply String Manipulation

Day 2

functions

• defining functions in python docs.python.org
• def: for defining functions
• in is for checking if something is in a list
• you can directly call your argument with its name in the function call func(name="franz") < will always set name to franz no matter on which position
• you can give default values in the definition def test(name="Franz") it will be overwritten when an argument is passed
• the form **data recieves a dictionary
• with / in the definition you can force to call an argument by position def pos_only_arg(arg, /): < this cannot be called by pos_only_arg(arg=2) < This is new in 3.8
• with * in the definition you can force to call an argument by name def name_only_arg(*, name): < this cannot be called by name_only_arg(2)
• with *name you can input an arbitrary amount of inputs that get saved in a Tuple def test(*args):

Tuples

• How to Tuple: tuple = (1,2,3) or a = 1,2,3
• unpacking b,c,d = a
• Tuples are immutable, this means they cannot be changed
• behave pretty much like Lists minus the changeability

Day 3

Packages and HTTP-Requests

• How To import ìmport <packagename> or from <packagename> import <thing>
• requests package for http request handling
• colorama for colorful printing in cmd/bash
• requests supports proxies with requests.get(url, proxies=<prxyDict>)
• requests supports sslVerify skip with requests.get(url, verify=False)
• doing the skip throws warnings (as it should be) you can surpress those with requests.packages.urllib3.disable_warnings()

Lambda Functions on AWS

• def lambda_handler(event, context): for the event handler event is the object from the request with return you can manage the http response
• external packages need to be installed via pip install <packageName> --target ./ in the root directory
• everything needs to be zipped and pushed to AWS lambda services

Pycharm

• jetbrains provides an opensource IDE for Pyton

TODOS

• learn how to work with requirements.txt on AWS lambdas

Day 4

Classes

• classes are created via class [name]: and then filled via the typical indent bracket
• you can define variables and functions inside the Class
• the function def __init__(self): is the constructor function
• you can check if an instance is a type of a class via isinstance(instance, typename)

Misc

• you can print dicts as pretty JSON for example like this json.dumps(dic, indent=4)

Links and Libraries to test

Google Sheets Automagica Automagica Github