nomeyer

from itertools import chain
l = [[0, 1], [2, 3]]
l = list(chain.from_iterable(l))

nomeyer

import matplotlib.pyplot as plt
bars = [3, 6, 2, 4]
plt.figure(figsize=(10, 5))
plt.bar(range(len(bars)), bars, align='center')
plt.show()

nomeyer

import numpy as np
import matplotlib.pyplot as plt
counts = [10, 8, 6, 14]
weights = np.ones_like(counts) / float(len(counts))
plt.figure(figsize=(10, 5))
plt.hist(counts, bins=range(1, max(counts)+2), align='left', weights=weights)
plt.xticks(range(1, max(counts)+1))
plt.show()

nomeyer

from sqlalchemy import create_engine
from sqlalchemy.engine.url import URL
from sqlalchemy.orm import sessionmaker
from sqlalchemy.sql.expression import text as Text


def db_connect(db):
    return create_engine(URL(**db))  # db should be a dict with connection params

nomeyer

from operator import itemgetter
sorted_d = sorted(d.items(), key=itemgetter(1), reverse=True)
# sorted_dict is a list of tuples (key, value)

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L = [1, 2, 3, 1]
[i for i, x in enumerate(L) if x == value]

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from flask import request
# here we want to get the value of user (i.e. ?user=value)
user = request.args.get('user')

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import cProfile
import StringIO
import pstats
import contextlib


@contextlib.contextmanager
def profiled():
    pr = cProfile.Profile()
    pr.enable()

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curl -v --cookie "USER_TOKEN=Yes" http://127.0.0.1:5000/

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from functools import wraps
from flask import request, abort

def validate_post(validator, status_code):
    """Validate the POST request with the given validator function.
    Abort with the given status_code upon validation failure.
    """
    def decorator(func):
        @wraps(func)
        def wrapper(*args, **kwargs):