TypeSpeed

from time import time
from random import SystemRandom
from decimal import Decimal, getcontext

getcontext().prec = 3
minimumWordLength = 5
numberOfWords = 25


class typingspeed:
    def __init__(self, wordfile):
        self.rdev = SystemRandom()
        try:
            possibleWords = set(open(wordfile, "r").read().splitlines())
            possibleWords = filter(lambda _: len(_) >= minimumWordLength, possibleWords)
            possibleWords = [word.strip() for word in possibleWords]
            assert(len(possibleWords) >= numberOfWords)
            # List comprehension form:
            # possibleWords=[word.strip() for word in filter(lambda _: len(_)>=5, set(open(wordfile, "r").readlines()))]
        except IOError:
            print("File '{}' does not exist.".format(wordfile))
            return
        # (word, [0, 0]) = word, [time taken for word, string attempt (for later comparison), errors]
        self.words = dict((word, None) for word in self.rdev.sample(possibleWords, numberOfWords))

    def begin(self):
        while raw_input("Type 'ready' to begin: ").lower() != "ready":
            pass
        for word in self.words:
            print(word)
            t1 = time()
            attempt = raw_input("")
            t2 = time()
            self.words[word] = [t2 - t1, attempt == word]

    def __str__(self):
        if not hasattr(self, "words"):
            return ""
        successfulWords = {
            word: [timetaken, correct]
            for (word, [timetaken, correct]) in self.words.items()
            if correct == True
        }
        if len(successfulWords) < 1:
            return "All words were errors. You are a fucking terrible typer."
        fastestWord = min(
            successfulWords.items(),
            key=lambda word: word[1][0] / len(word[0])
        )
        slowestWord = max(
            successfulWords.items(),
            key=lambda word: word[1][0] / len(word[0])
        )
        return '\n'.join([
            "Fastest Word: {} {}s/letter",
            "Slowest Word: {} {}s/letter"
        ]).format(
            fastestWord[0],
            Decimal(fastestWord[1][0])/len(fastestWord[0]),
            slowestWord[0],
            Decimal(slowestWord[1][0])/len(fastestWord[0])
        )

ts = typingspeed("words.txt")
ts.begin()
print(ts)