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June 4, 2019 04:38
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#!/usr/bin/python -tt | |
# Copyright 2010 Google Inc. | |
# Licensed under the Apache License, Version 2.0 | |
# http://www.apache.org/licenses/LICENSE-2.0 | |
# Google's Python Class | |
# http://code.google.com/edu/languages/google-python-class/ | |
"""Mimic pyquick exercise -- optional extra exercise. | |
Google's Python Class | |
Read in the file specified on the command line. | |
Do a simple split() on whitespace to obtain all the words in the file. | |
Rather than read the file line by line, it's easier to read | |
it into one giant string and split it once. | |
Build a "mimic" dict that maps each word that appears in the file | |
to a list of all the words that immediately follow that word in the file. | |
The list of words can be be in any order and should include | |
duplicates. So for example the key "and" might have the list | |
["then", "best", "then", "after", ...] listing | |
all the words which came after "and" in the text. | |
We'll say that the empty string is what comes before | |
the first word in the file. | |
With the mimic dict, it's fairly easy to emit random | |
text that mimics the original. Print a word, then look | |
up what words might come next and pick one at random as | |
the next work. | |
Use the empty string as the first word to prime things. | |
If we ever get stuck with a word that is not in the dict, | |
go back to the empty string to keep things moving. | |
Note: the standard python module 'random' includes a | |
random.choice(list) method which picks a random element | |
from a non-empty list. | |
For fun, feed your program to itself as input. | |
Could work on getting it to put in linebreaks around 70 | |
columns, so the output looks better. | |
""" | |
import argparse | |
import random | |
from collections import defaultdict | |
def read_words(file): | |
return file.read().split() | |
def glossary(words): | |
"""Returns mimic dict mapping each word to list of words which follow it.""" | |
first, last, empty = words[0], words[-1], '' | |
d = defaultdict(list, { | |
empty: [first], | |
last: [empty], | |
}) | |
for w, n in zip(words[:-1], words[1:]): | |
d[w].append(n) | |
return d | |
def mimic(d, first=''): | |
"""Given mimic dict and start word, prints 200 random words.""" | |
l = [] | |
w = first | |
for _ in range(200): | |
w = random.choice(d[w]) | |
l.append(w) | |
return ' '.join(l) | |
# Provided main(), calls mimic_dict() and mimic() | |
def main(): | |
parser = argparse.ArgumentParser(description='Gerador de lero-lero.') | |
parser.add_argument('file', type=argparse.FileType()) | |
args = parser.parse_args() | |
print(mimic(glossary(read_words(args.file)))) | |
if __name__ == '__main__': | |
main() |
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Top. Funcionou perfeito no Windows também!!