pythonchallenge答案

本文解析了一系列Python编程挑战赛题目,涉及字符串操作、正则表达式、网络请求、图像处理等技术,通过具体代码示例展示了如何解决每个挑战。

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测试关

2<<37

第1关

import string

str="g fmnc wms bgblr rpylqjyrc gr zw fylb. rfyrq ufyr amknsrcpq ypc dmp. bmgle gr gl zw fylb gq glcddgagclr ylb rfyr'q ufw rfgq rcvr gq qm jmle. sqgle qrpgle.kyicrpylq() gq pcamkkclbcb. lmu ynnjw ml rfc spj."

transfun=string.maketrans('abcdefghijklmnopqrstuvwxyz','cdefghijklmnopqrstuvwxyzab')
print str.translate(transfun)
print 'map'.translate(transfun)

第2关

import re

f=open('2.tmp','r')
str=f.read()
res=re.findall(r"[a-zA-Z]", str)
print ''.join(res)


import string
print ''.join([i for i in open('2.tmp').read() if i in string.ascii_letters])

第3关

import urllib2,re


f=urllib2.urlopen('http://www.pythonchallenge.com/pc/def/equality.html')
str= f.read()

#res=re.findall(r"(?<=[^A-Z][A-Z]{3})[a-z](?=[A-Z]{3}[^A-Z])", str)
res=re.findall(r"[^A-Z][A-Z]{3}([a-z])[A-Z]{3}[^A-Z]", str)
print ''.join(res).lower()

第4关

import re,urllib

value=33110

pattern=r"(?<=and the next nothing is )\d+"

#findNothing = re.compile(r'(?<=and the next nothing is )\d+').search

while True:
response=urllib.urlopen("http://www.pythonchallenge.com/pc/def/linkedlist.php?nothing=%s"%value)

page=response.read()
matche=re.search(pattern, page)
#matche=findNothing(page)
if not matche:
break;
else:
print page
value=matche.group(0)

print int(value)/2

第5关

import pickle

object = pickle.load(open("banner.p"))

for item in object:
print "".join(map(lambda p: p[0]*p[1], item))

第6关

import zipfile,re

z=zipfile.ZipFile('channel.zip','r')

value=90052

findNothing = re.compile(r'(?<=Next nothing is )\d+').search

comments=[]

while True:
content=z.read('%s.txt'%value)
comments.append(z.getinfo('%s.txt'%value).comment)
match=findNothing(content)
# match=apply(findNothing,(content,))
if match:
value=match.group(0)
else:
break
print content

print z.read('%s.txt'%value)

print ''.join(comments)

第7关

import Image

im = Image.open("oxygen.png")
print im.format, im.mode, im.size

w,h=im.size

print im.getpixel((0,h//2))

print ''.join([chr(im.getpixel((i,h//2))[0]) for i in range(0,w,7)])

print ''.join(map(chr,[105, 110, 116, 101, 103, 114, 105, 116, 121]))

第8关

import bz2

print "username:%s"%bz2.decompress("BZh91AY&SYA\xaf\x82\r\x00\x00\x01\x01\x80\x02\xc0\x02\x00 \x00!\x9ah3M\x07<]\xc9\x14\xe1BA\x06\xbe\x084")
print "password:%s"%bz2.decompress("BZh91AY&SY\x94$|\x0e\x00\x00\x00\x81\x00\x03$ \x00!\x9ah3M\x13<]\xc9\x14\xe1BBP\x91\xf08")

a="BZh91AY&SY\x94$|\x0e\x00\x00\x00\x81\x00\x03$ \x00!\x9ah3M\x13<]\xc9\x14\xe1BBP\x91\xf08"
print a.decode('bz2')

第9关

import Image
from functools import partial

first=[146,399,163,403,170,393,169,391,166,386,170,381,170,371,170,355,169,346,167,335,170,329,170,320,170,
310,171,301,173,290,178,289,182,287,188,286,190,286,192,291,194,296,195,305,194,307,191,312,190,316,
190,321,192,331,193,338,196,341,197,346,199,352,198,360,197,366,197,373,196,380,197,383,196,387,192,
389,191,392,190,396,189,400,194,401,201,402,208,403,213,402,216,401,219,397,219,393,216,390,215,385,
215,379,213,373,213,365,212,360,210,353,210,347,212,338,213,329,214,319,215,311,215,306,216,296,218,
290,221,283,225,282,233,284,238,287,243,290,250,291,255,294,261,293,265,291,271,291,273,289,278,287,
279,285,281,280,284,278,284,276,287,277,289,283,291,286,294,291,296,295,299,300,301,304,304,320,305,
327,306,332,307,341,306,349,303,354,301,364,301,371,297,375,292,384,291,386,302,393,324,391,333,387,
328,375,329,367,329,353,330,341,331,328,336,319,338,310,341,304,341,285,341,278,343,269,344,262,346,
259,346,251,349,259,349,264,349,273,349,280,349,288,349,295,349,298,354,293,356,286,354,279,352,268,
352,257,351,249,350,234,351,211,352,197,354,185,353,171,351,154,348,147,342,137,339,132,330,122,327,
120,314,116,304,117,293,118,284,118,281,122,275,128,265,129,257,131,244,133,239,134,228,136,221,137,
214,138,209,135,201,132,192,130,184,131,175,129,170,131,159,134,157,134,160,130,170,125,176,114,176,
102,173,103,172,108,171,111,163,115,156,116,149,117,142,116,136,115,129,115,124,115,120,115,115,117,
113,120,109,122,102,122,100,121,95,121,89,115,87,110,82,109,84,118,89,123,93,129,100,130,108,132,110,
133,110,136,107,138,105,140,95,138,86,141,79,149,77,155,81,162,90,165,97,167,99,171,109,171,107,161,
111,156,113,170,115,185,118,208,117,223,121,239,128,251,133,259,136,266,139,276,143,290,148,310,151,
332,155,348,156,353,153,366,149,379,147,394,146,399]
second=[156,141,165,135,169,131,176,130,187,134,191,140,191,146,186,150,179,155,175,157,168,157,163,157,159,
157,158,164,159,175,159,181,157,191,154,197,153,205,153,210,152,212,147,215,146,218,143,220,132,220,
125,217,119,209,116,196,115,185,114,172,114,167,112,161,109,165,107,170,99,171,97,167,89,164,81,162,
77,155,81,148,87,140,96,138,105,141,110,136,111,126,113,129,118,117,128,114,137,115,146,114,155,115,
158,121,157,128,156,134,157,136,156,136]

im=Image.open("good.jpg", "r")

image=Image.new(im.mode, im.size)

color=(100,255,100)

#points=[(x,y) for x in first for y in second]

points=[(first[x],first[x+1]) for x in range(0,len(first),2)]
points.extend([(second[x],second[x+1]) for x in range(0,len(second),2)])
#points.sort()
#print points
image.putpixel2=partial(image.putpixel,value=color)

for point in points:
image.putpixel2(point)

image.save("good2.jpg")

第10关

import re

result='1'

pattern=re.compile(r'((?P<w>\d)(?P=w)*)')

for i in range(30):
a=map(lambda x:'%s%s'%(len(x[0]),x[1]),pattern.findall(result))
result=''.join(a)

print len(result)

第11关

import Image

im=Image.open("cave.jpg")

width=im.size[0]
height=im.size[1]

even=Image.new(im.mode, (width/2,height/2))
odd=Image.new(im.mode, tuple([x/2 for x in im.size]))

for x in range(width):
for y in range(height):
pixel=im.getpixel((x,y))
if x%2^y%2:
odd.putpixel(((x-1)/2, y/2) if x%2 else (x/2, (y-1)/2) , pixel)
else:
even.putpixel((x/2, y/2), pixel)

even.save('cave_even.jpg')
odd.save('cave_odd.jpg')

第12关

content=open("evil2.gfx").read()
[open("12_%d.jpg" %i, "w").write(content[i::5]) for i in range(5)]

第13关


import xmlrpclib

server=xmlrpclib.Server("http://www.pythonchallenge.com/pc/phonebook.php")
print server.phone("Bert")

第14关

import Image

im=Image.open("wire.png")

print im.size
print im.mode

im14=Image.new(im.mode, (100,100))

directions=[(1,0),(0,1),(-1,0),(0,-1)]

def put(num,f):
min,max=-1,num
x=y=0
direction=0
for i in range(num*num):
if (not min<x+directions[direction][0]<max) or (not min<y+directions[direction][1]<max) or(x==min+1 and y==min+2):
direction+=1
if direction is 4:
direction=0
min+=1
max-=1
apply(f,((x,y),))
x+=directions[direction][0]
y+=directions[direction][1]


res=[]
put(100,res.append)
for i,item in enumerate(res):
im14.putpixel(item,im.getpixel((i,0)))
im14.save('14.jpg')

第15关

import datetime,calendar

for i in range(1006,1997,10):
d=datetime.date(i,1,26)
if d.weekday() == 0 and i%4==0:
print d


第16关

import Image

#im=Image.open("good.jpg")
im=Image.open("mozart.gif")

print im.size

print im.mode

print im.getpixel((630,2))

def straighten(line): # 找到第一个粉红色像素,然后以它为开头,左对齐
i=0
while line[i]!=195:
idx+=1
return line[i:]+line[:i]

for h in range(im.size[1]):
line=[im.getpixel((w,h)) for w in range(im.size[0])]
line=straighten(line)
[im.putpixel((w,h),line[w]) for w in range(im.size[0])]

im.save('16.gif')
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