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Exercise 05: Files, Creative uses of lists
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Introduction
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Files can be opened using the .open method, and then processed one character at a time as a bytestream using the .read method with an argument of 1:

    f = open("myfile.txt")
    firstletter = f.read(1)
    f.close()

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def count(filename):
    f = open(filename)
    text = f.read()
    text.lower()
    
    
    letters = [0] * 26
    for letter in text:
        index = ord(letter) - ord("a")
        if index >= 0  and index < 26:

chriszf

Exercise 02: Math and functions
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Introduction
--------
We're taught mathematical notation using 'infix' notation, that is, the operator goes between the numbers:

    eg: In '3 + 2', the operator, '+', goes between the operands, 3 and 2.

An alternate notation for math is called 'prefix'. As you might have guessed, in prefix notation, the operator goes in front of the operands:

chriszf

#define XPIN 2
#define YPIN 1
#define ZPIN 0

#define MAX_POINTS 48
#define ACTUAL_POINTS 16

unsigned long readTimer = 0;
unsigned long reportTimer = 0;
unsigned long lastTimer = 0;

chriszf

#!/usr/bin/env python
from math import sqrt

def pearson(pairs):
    # Takes in a list of pairwise ratings and produces a pearson similarity
    series_1 = [float(pair[0]) for pair in pairs]
    series_2 = [float(pair[1]) for pair in pairs]

    sum1 = sum(series_1)
    sum2 = sum(series_2)

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def main():
    f = open("twain.txt")
    text = f.read()
    f.close()

    text = text.lower()

    num_letters = [0] * 26

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import os
import shutil

def make_dir(name):
    raise Exception() 
    if not os.path.exists("target /" + name):
        os.mkdir("target /" + name)

def main():
    file_list = os.listdir("./files")

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def match(m, p):
  """Matches each player with their optimal mentor pair"""
  pairs = []
  total_score = 0
  while m:
    mentor = m.pop()
    player = p.pop()
    score = mentor.score(player)
    total_score += score
    pair = Pair(player, mentor, score)

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class Person(object):
  @classmethod
  def format(cls, filename):
    f = open(filename)
    file_list = f.read().split()
    f.close()
    person_list = []
    for person in file_list:
      person_list.append(cls(person))
    person_list.sort(key = lambda p: p.length)

chriszf

def format(filename, class_type):
  """Creates list of names from file ordered by name length"""
  f = open(filename)
  file_list = f.read().split()
  f.close()
  person_list = []
  for person in file_list:
      person_list.append(class_type)
  person_list.sort(key = lambda p: p.length)