Python-practice2011/practice3/SeminRS/code.html at master · uralbash/Python-practice2011 · GitHub

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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
	<head>
	<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
	<link rel="stylesheet" type="text/css" href="style.css">
	<title>
		ПРАКТИКА 3
	</title>
	</head>
	<body style="background-image: url('images/backgroundBody.jpg');">
		<div id = "header">
			<H1>Описание второй практики</H1>
			<hr>
		</div>
		<div id = "body">
			<H1>Код Программы</H1>
			<a href = "index.html">вернуться к главной</a>
					<hr>
					<pre>
						#!/usr/bin/env python
						#-*- coding: utf-8 -*-
						alphabet = u'абвгдежзийклмнопрстуфхцчшщъыьэюя'
						key = [0,0,0,0,0,0,0,0,0,0]

						def findKey(codingString, decodingString):

							codingString = codingString.lower()
							decodingString = decodingString.lower()
							seek = 0;
							count = 0
							while count < 10 and seek < len(decodingString):

								if (alphabet.find(decodingString[seek]) != -1):
									decodingSym = alphabet.index(decodingString[seek])

								elif (decodingString[seek] == codingString[seek]):
									seek += 1
									continue

								else:
									print "ERROR: incorrect decoding string"
									exit(0)

								if (alphabet.find(codingString[seek]) != -1):
									codingSym = alphabet.index(codingString[seek])
									key[count] = codingSym - decodingSym

									if key[count] < 0:
										key[count] = (len(alphabet) - 1) + key[count]

									count += 1
									seek += 1

								else:
									print "ERROR: incorrect decoding string"
									exit(0)

							if count < 10:
								print "ERROR: insufficient data"
								exit(1)


						def decoding(key, lines):

							newStr = ""
							count = 0
							keyCount = 0
							fileStr = ""
							while count < len(lines):
								newStr = ""
								for sym in lines[count].decode('utf-8'):
									if keyCount == 10:
										keyCount = 0

									if (alphabet.find(sym.lower()) != -1):
										newSym = alphabet.index(sym.lower()) - key[keyCount]
										if (newSym < 0):
											newSym += (len(alphabet) - 1)

										newSym = alphabet[newSym]

										if (sym.isupper()):
											newSym = newSym.upper()

										newStr += newSym
										keyCount += 1

									else:
										newStr += sym

								fileStr += newStr
								count += 1
							return fileStr


						def main(args):

							pathFile = args[1].decode('utf-8')
							decodingString = args[2].decode('utf-8')
							lines = open(pathFile,"r").readlines()
							findKey(lines[0].decode('utf-8'), decodingString)
							fileStr = decoding(key, lines)
							print "key: ",key
							f = open( pathFile, 'w')
							f.write(fileStr.encode('utf-8'))
							f.close()
							print "DONE"

						if __name__ == '__main__':
						    import sys
						    main(sys.argv[:])
					</pre>
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