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Convert all .py files to be valid Python (#98)

pull/142/head
cclauss 2018-03-07 01:37:46 +01:00 committed by Donne Martin
parent 3ca1f1d0d2
commit f099a0ad3f
7 changed files with 78 additions and 39 deletions
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11
solutions/object_oriented_design/call_center/call_center.py
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@ -112,6 +112,11 @@ class CallCenter(object):
return employee return employee
return None return None
def notify_call_escalated(self, call): # ... def notify_call_escalated(self, call):
def notify_call_completed(self, call): # ... pass
def dispatch_queued_call_to_newly_freed_employee(self, call, employee): # ...
def notify_call_completed(self, call):
pass
def dispatch_queued_call_to_newly_freed_employee(self, call, employee):
pass

5
solutions/object_oriented_design/deck_of_cards/deck_of_cards.py
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@ -92,7 +92,7 @@ class BlackJackHand(Hand):
def possible_scores(self): def possible_scores(self):
"""Return a list of possible scores, taking Aces into account.""" """Return a list of possible scores, taking Aces into account."""
# ... pass
class Deck(object): class Deck(object):
@ -113,4 +113,5 @@ class Deck(object):
return None return None
return card return card
def shuffle(self): # ... def shuffle(self):
pass

17
solutions/object_oriented_design/lru_cache/lru_cache.py
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@ -11,9 +11,14 @@ class LinkedList(object):
self.head = None self.head = None
self.tail = None self.tail = None
def move_to_front(self, node): # ... def move_to_front(self, node):
def append_to_front(self, node): # ... pass
def remove_from_tail(self): # ...
def append_to_front(self, node):
pass
def remove_from_tail(self):
pass
class Cache(object): class Cache(object):
@ -26,7 +31,7 @@ class Cache(object):
def get(self, query) def get(self, query)
"""Get the stored query result from the cache. """Get the stored query result from the cache.
Accessing a node updates its position to the front of the LRU list. Accessing a node updates its position to the front of the LRU list.
""" """
node = self.lookup[query] node = self.lookup[query]
@ -37,7 +42,7 @@ class Cache(object):
def set(self, results, query): def set(self, results, query):
"""Set the result for the given query key in the cache. """Set the result for the given query key in the cache.
When updating an entry, updates its position to the front of the LRU list. When updating an entry, updates its position to the front of the LRU list.
If the entry is new and the cache is at capacity, removes the oldest entry If the entry is new and the cache is at capacity, removes the oldest entry
before the new entry is added. before the new entry is added.
@ -58,4 +63,4 @@ class Cache(object):
# Add the new key and value # Add the new key and value
new_node = Node(results) new_node = Node(results)
self.linked_list.append_to_front(new_node) self.linked_list.append_to_front(new_node)
self.lookup[query] = new_node self.lookup[query] = new_node

51
solutions/object_oriented_design/online_chat/online_chat.py
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@ -6,11 +6,20 @@ class UserService(object):
def __init__(self): def __init__(self):
self.users_by_id = {} # key: user id, value: User self.users_by_id = {} # key: user id, value: User
def add_user(self, user_id, name, pass_hash): # ... def add_user(self, user_id, name, pass_hash):
def remove_user(self, user_id): # ... pass
def add_friend_request(self, from_user_id, to_user_id): # ...
def approve_friend_request(self, from_user_id, to_user_id): # ... def remove_user(self, user_id):
def reject_friend_request(self, from_user_id, to_user_id): # ... pass
def add_friend_request(self, from_user_id, to_user_id):
pass
def approve_friend_request(self, from_user_id, to_user_id):
pass
def reject_friend_request(self, from_user_id, to_user_id):
pass
class User(object): class User(object):
@ -25,12 +34,23 @@ class User(object):
self.received_friend_requests_by_friend_id = {} # key: friend id, value: AddRequest self.received_friend_requests_by_friend_id = {} # key: friend id, value: AddRequest
self.sent_friend_requests_by_friend_id = {} # key: friend id, value: AddRequest self.sent_friend_requests_by_friend_id = {} # key: friend id, value: AddRequest
def message_user(self, friend_id, message): # ... def message_user(self, friend_id, message):
def message_group(self, group_id, message): # ... pass
def send_friend_request(self, friend_id): # ...
def receive_friend_request(self, friend_id): # ... def message_group(self, group_id, message):
def approve_friend_request(self, friend_id): # ... pass
def reject_friend_request(self, friend_id): # ...
def send_friend_request(self, friend_id):
pass
def receive_friend_request(self, friend_id):
pass
def approve_friend_request(self, friend_id):
pass
def reject_friend_request(self, friend_id):
pass
class Chat(metaclass=ABCMeta): class Chat(metaclass=ABCMeta):
@ -51,8 +71,11 @@ class PrivateChat(Chat):
class GroupChat(Chat): class GroupChat(Chat):
def add_user(self, user): # ... def add_user(self, user):
def remove_user(self, user): # ... pass
def remove_user(self, user):
pass
class Message(object): class Message(object):
@ -77,4 +100,4 @@ class RequestStatus(Enum):
UNREAD = 0 UNREAD = 0
READ = 1 READ = 1
ACCEPTED = 2 ACCEPTED = 2
REJECTED = 3 REJECTED = 3

12
solutions/object_oriented_design/parking_lot/parking_lot.py
View File

@ -1,4 +1,5 @@
from abc import ABCMeta, abstractmethod from abc import ABCMeta, abstractmethod
from enum import Enum
class VehicleSize(Enum): class VehicleSize(Enum):
@ -92,11 +93,11 @@ class Level(object):
def _find_available_spot(self, vehicle): def _find_available_spot(self, vehicle):
"""Find an available spot where vehicle can fit, or return None""" """Find an available spot where vehicle can fit, or return None"""
# ... pass
def _park_starting_at_spot(self, spot, vehicle): def _park_starting_at_spot(self, spot, vehicle):
"""Occupy starting at spot.spot_number to vehicle.spot_size.""" """Occupy starting at spot.spot_number to vehicle.spot_size."""
# ... pass
class ParkingSpot(object): class ParkingSpot(object):
@ -117,5 +118,8 @@ class ParkingSpot(object):
return False return False
return vehicle.can_fit_in_spot(self) return vehicle.can_fit_in_spot(self)
def park_vehicle(self, vehicle): # ... def park_vehicle(self, vehicle):
def remove_vehicle(self): # ... pass
def remove_vehicle(self):
pass

1
solutions/system_design/social_graph/social_graph_snippets.py
View File

@ -61,3 +61,4 @@ class UserGraphService(object):
def bfs(self, source, dest): def bfs(self, source, dest):
# Use self.visited_ids to track visited nodes # Use self.visited_ids to track visited nodes
# Use self.lookup to translate a person_id to a Person # Use self.lookup to translate a person_id to a Person
pass

20
solutions/system_design/web_crawler/web_crawler_snippets.py
View File

@ -2,33 +2,33 @@
class PagesDataStore(object): class PagesDataStore(object):
def __init__(self, db); def __init__(self, db):
self.db = db self.db = db
... pass
def add_link_to_crawl(self, url): def add_link_to_crawl(self, url):
"""Add the given link to `links_to_crawl`.""" """Add the given link to `links_to_crawl`."""
... pass
def remove_link_to_crawl(self, url): def remove_link_to_crawl(self, url):
"""Remove the given link from `links_to_crawl`.""" """Remove the given link from `links_to_crawl`."""
... pass
def reduce_priority_link_to_crawl(self, url) def reduce_priority_link_to_crawl(self, url):
"""Reduce the priority of a link in `links_to_crawl` to avoid cycles.""" """Reduce the priority of a link in `links_to_crawl` to avoid cycles."""
... pass
def extract_max_priority_page(self): def extract_max_priority_page(self):
"""Return the highest priority link in `links_to_crawl`.""" """Return the highest priority link in `links_to_crawl`."""
... pass
def insert_crawled_link(self, url, signature): def insert_crawled_link(self, url, signature):
"""Add the given link to `crawled_links`.""" """Add the given link to `crawled_links`."""
... pass
def crawled_similar(self, signature): def crawled_similar(self, signature):
"""Determine if we've already crawled a page matching the given signature""" """Determine if we've already crawled a page matching the given signature"""
... pass
class Page(object): class Page(object):
@ -41,7 +41,7 @@ class Page(object):
def create_signature(self): def create_signature(self):
# Create signature based on url and contents # Create signature based on url and contents
... pass
class Crawler(object): class Crawler(object):