# python # # Challenge # Level 2

recognize the characters. maybe they are in the book,
but MAYBE they are in the page source.

...<!--
find rare characters in the mess below:
--><!--
%%$@_$^__#)^)&!_+]!*@&^}@[@%]()%+$&[(_@%+%$*^@$^!+]!&_#)_*}{}}!}_]$[%}@[{_@#_^{*
@##&{#&{&)*%(]{{([*}@[@&]+!!*{)!}{%+{))])[!^})+)$]#{*+^((@^@}$[**$&^{$!@#$%)!@(&
+^!{%_$&@^!}$_${)$_#)!({@!)(^}!*^&!$%_&&}&_#&@{)]{+)%*{&*%*&@%$+]!*__(#!*){%&@++
!_)^$&&%#+)}!@!)&^...
-->

# coding=utf-8
# ocr

string = "%%$@_$^__#)^)&!_+]!*@&..." # 太长了，文章贴不下，略去

string_dict = {}
for x in string:
    if x not in string_dict:
       string_dict[x] = 0

while string:
   x = string[0]
   origin_len = len(string)
   string = string.replace(x, '')
   string_dict[x] = origin_len - len(string)
    
print(string_dict)

{'!': 6079, '#': 6115, '%': 6104, '$': 6046, '&': 6043, ')': 6186, '(': 6154, '+': 6066, '*': 6034, '@': 6157, '[': 6108, ']': 6152, '_': 6112, '^': 6030, 'a': 1, 'e': 1, 'i': 1, 'l': 1, 'q': 1, 'u': 1, 't': 1, 'y': 1, '{': 6046, '}': 6105}

# string 太长了，略去

for x in string:
    if not x.isalpha():
       string = string.replace(x, '')
print(string)

equality

print "".join([char for char in text if char.isalpha()])

import string
filter(lambda x: x in string.letters, text)