Drugie zadanie
adres: http://www.pythonchallenge.com/pc/def/ocr.html
tytuł strony: ocr
podpowiedź:
recognize the characters. maybe they are in the book,
but MAYBE they are in the page source.
rozwiązanie:
zaglądam do kodu strony i znajduję tam mnóstwo dziwnych znaków i polecenie:
<!-- find rare characters in the mess below: -->
<!-- %%$@_$^__#)^)&!_+]!*@&^}@[@%]()%+$&[(_@%+%$*^@$^!+]!&_#)_*} }}!}_]$[%}@[{_@#_^{*@##&{#&{&)*%(]{{([*}@[@&]+!!*{)!}{%+{))])[!^} )+)$]#{*+^((@^@}$[**$&^{$!@#$%)!@(&+^!{%_$&@^!}$_${)$_#)!({@!)(^} !*^&!$%_&&}&_#&@{)]{+)%*{&*%*&@%$+]!*__(#!*){%&@++!_) (...) #@}&$[[%]_&$+)$!%{(}$^$}* -->
co to znaczy rzadkie? do sprawdzenia jakie mam znaki w tym bałaganie stworzyłam histogram:
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| f = open('2.txt', 'r') | |
| histogram = {} | |
| file = f.read() | |
| for char in file: | |
| if char != '\n': | |
| if char in histogram.keys(): | |
| histogram[char] += 1 | |
| else: | |
| histogram[char] = 1 | |
| print histogram |
odpalam:
w wyniku widać, że rzadkie znaki to zwykłe litery alfabetu ukryte pomiędzy różnymi innymi znakami. Skoro już wiadomo czego szukać rozwiązanie zajmie jedną linijkę 😉
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| import re | |
| print "".join(re.findall(r"[a-z]", file)) |
adres kolejnej zagadki: http://www.pythonchallenge.com/pc/def/equality.html