vasanthk

System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

Basic Steps

1. Clarify and agree on the scope of the system

• User cases (description of sequences of events that, taken together, lead to a system doing something useful)
  • Who is going to use it?
  • How are they going to use it?

fnielsen

import pandas as pd

df = pd.DataFrame([[1, 2, 's'], [3, 4, 't'], [4, 5, 'u']], 
                  index=[-1, 0, 1], columns=['a', 'b', 'c'])

>>> df.a    # Correct type
-1    1
 0    3
 1    4
Name: a, dtype: int64

arasharchor

import numpy as np

class KNearestNeighbor:
  """ a kNN classifier with L2 distance """

  def __init__(self):
    pass

  def train(self, X, y):
    """