gcrsaldanha

# https://www.django-rest-framework.org/api-guide/fields/#error_messages
from rest_framework import serializers as s


class User(s.Serializer):
    name = s.CharField(error_messages={"blank": "This is a custom message! Yeah!"})
    
    
user = User(data={"name": ""})
user.is_valid()

gcrsaldanha

#include <cs50.h>
#include <stdio.h>

int main(void)
{
    int n;
    do
    {
        n = get_int("Size: ");
    }

gcrsaldanha

# Para mais conteúdos de Python, acesse: https://instagram.com/gabrielsaldanha.dev

# É necessário ter Pillow instalado:
# $ python3 -m pip install Pillow
from PIL import Image, ImageDraw, ImageFont

image = Image.new("RGB", (1080, 1080), color=(41, 46, 48))
img_draw = ImageDraw.Draw(image)
# Arquivo de fonte Helvetica.ttc deve estar no mesmo diretório
# que o programa está sendo executado

gcrsaldanha

import time  # I will use it to simulate latency with time.sleep
from concurrent.futures import ThreadPoolExecutor, as_completed

def has_facebook_account(user_email):
    time.sleep(5)  # 5 seconds! That is bad.
    print("Finished facebook after 5 seconds!")
    return True

def has_github_account(user_email):
    time.sleep(1)  # 1 second. Phew!

gcrsaldanha

  
'''
Important docs
https://web3py.readthedocs.io/en/stable/web3.eth.html#web3.eth.Eth.getTransaction
https://web3py.readthedocs.io/en/stable/web3.eth.html#web3.eth.Eth.getTransactionReceipt
'''
import hashlib
import json
import os

gcrsaldanha

# truffle develop

Truffle Develop started at http://127.0.0.1:9545/

Accounts:
(0) 0xdfb772fba7631b5bfde93cc3e2b0e488d1a17b2a
(1) 0xf2d6f135c743398e370fb865ea69d3ccfb96f123
(2) 0xe5f0f5700e678bb92c9414773b9a9fad1f730d17
(3) 0x69ffe89931711b15db6d5cd7b181c940dc83cabe
(4) 0x19f802fb5bda9631792e58208baba2e0ce7cc7ef

gcrsaldanha

def has_facebook_account(user_email):
    print('calling Facebook service')
    return False

def has_github_account(user_email):
    print('calling Github service')
    return True

def has_twitter_account(user_email):
    print('calling Twitter service')

gcrsaldanha

import time
from functools import wraps


def timing(decorated):
    @wraps(decorated)
    def decorator(*args, **kwargs):
        print(f'Calling {decorated.__name__} function')
        start_time_time = time.time()
        start_time_perf = time.perf_counter()

gcrsaldanha

def get_largest_prime_factor(number):
    prime_factors = []
    divisor = 1
    i = 1
    while(i <= number // divisor):  # integer division
        if number % i == 0:  # if number is divisible by i
            divisor = i  # found a divisor, is used in line 5 to "short" the stop clause
            if is_prime(divisor):  # filter only prime divisors (factors)
                prime_factors.append(divisor)
        i += 1

gcrsaldanha

def find_factors(number):
    factors = []
    for factor in range(1, number + 1):  # makes range go from 1 to number (inclusive)
        if number % factor == 0:
            factors.append(factor)
    return factors

# Or by using list comprehensions
def find_factors_comprehesion(number):
    return [factor for factor in range(1, number + 1) if number % factor == 0]