zpconn

def build(pairs, root=None):
    tree = {}
    for (child, parent) in pairs:
        if parent == root:
            tree[child] = build(filter(lambda x: x != (child, parent), pairs), child)
    return tree

print build([("H", "G"), ("F", "G"), ("G", "D"), ("E", "D"), ("A", "E"), ("B", "C"), ("C", "E"), ("D", None)])

zpconn

def postfix(tokens):
    output_stack = []
    op_stack = []
    for token in tokens:
        if is_number(token):
            output_stack.append(token)
        elif token in ['+', '-', '*', '/']:
            while len(op_stack) > 0:
                if (token in ['+', '-'] and op_stack[-1] in ['*', '/']) or (token in ['*', '/'] and op_stack[-1] in ['*', '/']):
                    output_stack.append(op_stack.pop())

zpconn

from mpl_toolkits.basemap import Basemap
from shapely.geometry import Point, MultiPoint
import pandas as pd
import matplotlib.pyplot as plt

x = []
y = []
with open('data.tsv', 'r') as fp:
	for line in fp:
		s = line.split('\t')

zpconn

from collections import defaultdict
import random

class Markov:
  memory = defaultdict(list)
  separator = ' '

  def get_initial(self):
    return (' ', ' ')

zpconn

# A simple discrete-time PID controller. If plot is true, this will use matplotlib to show a graph.
# Otherwise, it will simply print out the successive values of the controller.

plot = True

if __name__ == '__main__':
	if plot:
		import matplotlib.pyplot as plt

	v = [0] * 100

zpconn

def pairify(it):
  	it0, it1 = itertools.tee(it, 2)
	first = next(it0)
	return zip(itertools.chain([first, first], it0), it1)

def cluster(sequence, maxgap):
	batch = []
	for prev, val in pairify(sequence):
		if abs(val - prev) >= maxgap:
			yield batch

zpconn

module Main (main) where

match :: String -> String -> Bool
match ('^':rest) text     = matchLocal rest text
match rex        (c:rest) = matchLocal rex (c:rest) || match rex rest
match _          _        = False

matchLocal :: String -> String -> Bool
matchLocal []            _         = True
matchLocal "$"           []        = True