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from inspect import signature


class dynamicdict(dict):
    def __init__(self, default_factory, **kwargs):
        super().__init__(**kwargs)
        self._default_factory = default_factory

    def __missing__(self, key):
        self[key] = self._default_factory(key)

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#utf-8

######################
# Line Transformers: #
######################

# ------------------------------------------
# --- `λxy.` shortcut for `lambda x, y:` ---
# ------------------------------------------

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import numpy as np
from PIL import Image

from kivy.app import App
from kivy.animation import Animation
from kivy.clock import Clock
from kivy.uix.widget import Widget
from kivy.graphics import Color, Rectangle

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from itertools import islice


class block:
    __slots__ = 'prev', 'next', 'val'

    def __init__(self, val, prev=None, next=None):
        self.prev = self if prev is None else prev
        self.next = self if next is None else next
        self.val = val

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from importlib import import_module
from inspect import signature

modules = 'igraph', 'networkx', 'graph_tool'


class interface:
    """A decorator for Graph methods which will set the correct interface method on the first call to that method.
    """
    def __init__(self, func):

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"""
A small test of our setch.
"""
use "collections"

actor Main
    new create(env: Env) =>
        let s: Setch[USize] = Setch[USize]

        for j in Range(0, 10) do

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from collections import deque

class Calculator:
    ops = {
        "+":lambda x, y:x + y,
        "*":lambda x, y:x * y,
    }

    precedence = (
        ("+", "*"),

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import curses
from itertools import product
from time import time, sleep

import cv2
import numpy as np


path = "never_gonna.mp4"

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from ast import iter_child_nodes, parse, Load, Store, Delete
from igraph import Graph


class EnumDict(dict):
    def __init__(self):
        self.types = [ ]

    def __missing__(self, key):
        self[key] = len(self.types)

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def _make_row(separators, entries):
    """A string representation of a single row in a table.
    """
    left, middle, right = separators
    return f'{left}{middle.join(entries)}{right}'

CENTERED = ' {:^{width}} '
LEFT_ALIGNED = ' {:<{width}} '

def make_table(rows, labels=None, centered=False):