codesnips

python

python 
import spacy
from spacy.matcher import Matcher

nlp = spacy.load('en_core_web_sm')
matcher = Matcher(nlp.vocab)
matcher.add('INCIDENT_ID', [[{'TEXT': {'REGEX': '^INC-[0-9]{6}$'}}]])

Natural language processing with spaCy pipelines and custom rules

spacy nlp entity-extraction
by Dr. Elena Vasquez 1 tab
python 
import pandas as pd

orders = pd.read_parquet('orders.parquet')
orders['ordered_at'] = pd.to_datetime(orders['ordered_at'])

reference_date = orders['ordered_at'].max() + pd.Timedelta(days=1)

Feature engineering for recency, frequency, and monetary behavior

feature-engineering pandas rfm
by Dr. Elena Vasquez 1 tab
python 
from django.db import models
from django.utils import timezone


class SoftDeleteManager(models.Manager):
    def get_queryset(self):

Django model soft delete pattern

django python models
by Priya Sharma 1 tab
python 
from celery import Celery
from celery.schedules import crontab

app = Celery('myproject')
app.config_from_object('django.conf:settings', namespace='CELERY')

Django background tasks with Celery beat for scheduling

django python celery
by Priya Sharma 2 tabs
python 
from django.db import models
from django.contrib.postgres.indexes import GinIndex


class Post(models.Model):
    title = models.CharField(max_length=200, db_index=True)

Django database index strategies

django python database
by Priya Sharma 1 tab
python 
from datetime import datetime, timedelta, timezone

from fastapi.security import OAuth2PasswordBearer
from jose import jwt
from passlib.context import CryptContext

Reusable OAuth2 Password Bearer JWT Authentication Dependency in FastAPI

fastapi oauth2 jwt
by codesnips 4 tabs
python 
from django.core.cache import cache


class RateLimiter:
    def __init__(self, scope, limit, window_seconds):
        self.scope = scope

Rate-Limiting Django Password Reset Requests in a Form's clean() Method

django rate-limiting caching
by codesnips 3 tabs
python 
LOGGING = {
    'version': 1,
    'disable_existing_loggers': False,
    'formatters': {
        'verbose': {
            'format': '{levelname} {asctime} {module} {message}',

Django logging configuration for production

django python logging
by Priya Sharma 1 tab
python 
import uuid
import logging


class RequestIDMiddleware:
    def __init__(self, get_response):

Django middleware for request ID tracking

django python middleware
by Priya Sharma 1 tab
python 
from alembic import op
import sqlalchemy as sa

revision = "20240612_add_status"
down_revision = "20240515_create_orders"
branch_labels = None

Zero-Downtime NOT NULL Column Backfill with Alembic and SQLAlchemy

alembic sqlalchemy migrations
by codesnips 2 tabs
python 
import pandas as pd

customers = pd.read_parquet('customers.parquet')
orders = pd.read_parquet('orders.parquet')

assert customers['customer_id'].is_unique, 'customer table must be unique by customer_id'

Merging datasets safely with join keys and validation

pandas joins data-engineering
by Dr. Elena Vasquez 1 tab
python 
import pandas as pd
from statsmodels.tsa.statespace.sarimax import SARIMAX

df = pd.read_csv('daily_revenue.csv', parse_dates=['date']).set_index('date')

model = SARIMAX(

Time series forecasting with statsmodels SARIMAX baselines

time-series forecasting statsmodels
by Dr. Elena Vasquez 1 tab