Out of the Box

이 문서는 읽기 전용입니다. 원본을 볼 수는 있지만 바꿀 수는 없습니다. 문제가 있다고 생각하면 관리자에게 문의하세요.

====== 압축 ======

===== Text 압축 =====

python을 이용한 텍스트 압축

<code python>
#-*-coding: utf-8-*-

data = r"""
Wikipedia (Listeni/ˌwɪkɨˈpiːdiə/ or Listeni/ˌwɪkiˈpiːdiə/
WIK-i-PEE-dee-ə) is a free-access, free content Internet 
encyclopedia, supported and hosted by the non-profit 
Wikimedia Foundation. Anyone who can access the site[6] 
can edit almost any of its articles.[not in citation given]
Wikipedia is the seventh-most popular website[5] and 
constitutes the Internet's largest and most popular general
reference work.[7][8][9]
"""

#print data.decode('utf-8')
print "LEN: %d" % len(data)

raw_input()
cdata = data.encode('zlib').encode('base64')
print cdata
print "LEN: %d" % len(cdata)

raw_input()
rdata = cdata.decode('base64').decode('zlib')
#print rdata.decode('utf-8')
print "LEN: %d" % len(rdata)
</code>

위 예에서 435자를 394자로 압축 함, 압축된 코드는 아래와 같이 ascii 문자 만으로 구성되어 있음
<code>
eJxVUDtOw0AQ7XOK1wFSnFT8SoogRVDQpbBcbNbjeGRn1todE/kGFBS0uQHiJlYuxWYDglQ7n32/
may44Y5KNrh85qAkPD+878avZvw8vHV8+Ch53M/hPM7X/H+7Wj5lnL0sFllJlI37K3CAQeVjZ6yl
EKapgXUSORTL+HghBYkdbOuSgylC33XOK5UwUqJ24ViuB2hNECdZ513FiqPnbfL86HopjbKTGR5k
cELY1Q7WCE66CRpYKb8p0jjCFKbdRu4oMsBVYI1mvbJtKcxycQoWWNbEiw2/khT4uxP/kFKca50l
ps51fWs8drROYtdFShDjBmXtlU6Y39gXAfH3hpKHEmcUGxLypoWninw8T0zkfDPLb4v8rsjvi8k3
ii2k7g==
</code>

===== 압축 모듈 =====

  * https://github.com/facebook/zstd
  * http://google.github.io/snappy/