knowsuchagency

class Author:
    first_name: str
    last_name: str
    age: int
    books: T.Optional[T.List['Book']]


class Book:
    title: str
    author: Author

knowsuchagency

# package imports

# why all the try excepts?
# because weird stuff happens
# when this code is executed from a jupyter
# notebook vs as a module vs as __main__

knowsuchagency

knowsuchagency

knowsuchagency

knowsuchagency

import re
import json
import typing as T

from typing import NamedTuple
from textwrap import dedent
from collections import Counter


class Record(NamedTuple):

knowsuchagency

knowsuchagency

knowsuchagency

knowsuchagency

# This code was borrowed from David Beazley http://www.dabeaz.com/generators/follow.py
# Follow a file like tail -f.

import time
def follow(thefile):
    thefile.seek(0,2)
    while True:
        line = thefile.readline()
        if not line:
            time.sleep(0.1)