rajmayank

import boto3
import glob
import json
import os
import time
from datetime import datetime

from tqdm.notebook import tqdm

rajmayank

# 
# Setup in your bash with
# bash <(curl -sL https://gist.githubusercontent.com/rajmayank/eac2d8e58ceb66b4ef5d319dc1207875/raw/447da14b2d914f46caf23df82ce3e39ebb494b70/setup.sh)

# ==== ==== ==== ==== ==== 
# Setup for Vim

echo "set tabstop=2 softtabstop=2 shiftwidth=2
set expandtab
set number ruler

rajmayank

def FibonacciTill20():
    n1, n2 = 0, 1
    max_num = 20
    while True:
        n1, n2 = n2, (n1 + n2)
        if n2 <= max_num:
            yield n2
        else:
            raise StopIteration

rajmayank

for fibNumber in FibonacciTill20():
    print(fibNumber)
#  1
#  2
#  3
#  5
#  8
#  13

rajmayank

fib = FibonacciTill20()

print(next(fib))    # 1
print(next(fib))    # 2
print(next(fib))    # 3
print(next(fib))    # 5
print(next(fib))    # 8
print(next(fib))    # 13
print(next(fib))    # Exception: StopIteration

rajmayank

class FibonacciTill20:
    
    def __init__(self):
        self.n1, self.n2 = 0, 1
        self.max = 20
    
    def __iter__(self):
        return self
    
    def __next__(self):

rajmayank

my_list = ["item #1", "item #2", "item #3", "item #4"]
my_list_iter = iter(my_list)

print(type(my_list))        # <class 'list'>
print(my_list)              # ['item #1', 'item #2', 'item #3', 'item #4']

print(type(my_list_iter))   # <class 'list_iterator'>
print(my_list_iter)         # <list_iterator object at 0x10aa87d60>

print(next(my_list_iter))   # item #1

rajmayank

Counter: 1;  GoalMultiplier: 5;   Expected: 5;    Actual: 5
Counter: 2;  GoalMultiplier: 5;   Expected: 10;   Actual: 10
Counter: 3;  GoalMultiplier: 5;   Expected: 15;   Actual: 15
Counter: 4;  GoalMultiplier: 5;   Expected: 20;   Actual: 20
Counter: 5;  GoalMultiplier: 5;   Expected: 25;   Actual: 25
Counter: 6;  GoalMultiplier: 10;  Expected: 30;   Actual: 60
Counter: 7;  GoalMultiplier: 10;  Expected: 35;   Actual: 70
Counter: 8;  GoalMultiplier: 10;  Expected: 40;   Actual: 80
Counter: 9;  GoalMultiplier: 10;  Expected: 45;   Actual: 90

rajmayank

theGlobalMultiplier = 5

def myMultiplyingGenerator(numbers):
    for number in numbers:
        yield number * theGlobalMultiplier

for multipliedNumber in myMultiplyingGenerator(range(1,10)):    
    if multipliedNumber > 25:
        theGlobalMultiplier = 10    
    print(multipliedNumber)

rajmayank

import time

def myExpensiveOperations(items):    
    for item in items:
        time.sleep(2)     # The expensive operation
        yield item ** 2

for item in myExpensiveOperations(range(1,10)):
    if item > 20: break   # We apply the breaks early
    print(item)           # 1, 4, 9, 16