#!/usr/bin/env?python

import?sys?os?string

#?Utility?for?handling?the?intermediate?‘secondary?memory‘
def?touchopen（filename?*args?**kwargs）:
????try:
????????os.remove（filename）
????except?OSError:
????????pass
????open（filename?“a“）.close（）?#?“touch“?file
????return?open（filename?*args?**kwargs）

#?The?constrained?memory?should?have?no?more?than?1024?cells
data?=?[]
#?We‘re?lucky:
#?The?stop?words?are?only?556?characters?and?the?lines?are?all?
#?less?than?80?characters?so?we?can?use?that?knowledge?to?
#?simplify?the?problem:?we?can?have?the?stop?words?loaded?in?
#?memory?while?processing?one?line?of?the?input?at?a?time.
#?If?these?two?assumptions?didn‘t?hold?the?algorithm?would?
#?need?to?be?changed?considerably.

#?Overall?strategy:?（PART?1）?read?the?input?file?count?the?
#?words?increment/store?counts?in?secondary?memory?（a?file）?
#?（PART?2）?find?the?25?most?frequent?words?in?secondary?memory

#?PART?1:?
#?-?read?the?input?file?one?line?at?a?time
#?-?filter?the?characters?normalize?to?lower?case
#?-?identify?words?increment?corresponding?counts?in?file

#?Load?the?list?of?stop?words
f?=?open（‘../stop_words.txt‘）
data?=?[f.read（1024）.split（‘‘）]?#?data[0]?holds?the?stop?words
f.close（）

data.append（[]）????#?data[1]?is?line?（max?80?characters）
data.append（None）??#?data[2]?is?index?of?the?start_char?of?word
data.append（0）?????#?data[3]?is?index?on?characters?i?=?0
data.append（False）?#?data[4]?is?flag?indicating?if?word?was?found
data.append（‘‘）????#?data[5]?is?the?word
data.append（‘‘）????#?data[6]?is?wordNNNN
data.append（0）?????#?data[7]?is?frequency

#?Open?the?secondary?memory
word_freqs?=?touchopen（‘word_freqs‘?‘rb+‘）
#?Open?the?input?file
f?=?open（sys.argv[1]）
#?Loop?over?input?file‘s?lines
while?True:
????data[1]?=?[f.readline（）]?
????if?data[1]?==?[‘‘]:?#?end?of?input?file
????????break
????if?data[1][0][len（data[1][0]）-1]?!=?‘\n‘:?#?If?it?does?not?end?with?\n
????????data[1][0]?=?data[1][0]?+?‘\n‘?#?Add?\n
????data[2]?=?None
????data[3]?=?0?
????#?Loop?over?characters?in?the?line
????for?c?in?data[1][0]:?#?elimination?of?symbol?c?is?exercise
????????if?data[2]?==?None:
????????????if?c.isalnum（）:
????????????????#?We?found?the?start?of?a?word
????????????????data[2]?=?data[3]
????????else:
????????????if?not?c.isalnum（）:
????????????????#?We?found?the?end?of?a?word.?Process?it
????????????????data[4]?=?False?
????????????????data[5]?=?data[1][0][data[2]:data[3]].lower（）
????????????????#?Ignore?words?with?len?????????????????if?len（data[5]）?>=?2?and?data[5]?not?in?data[0]:
????????????????????#?Let‘s?see?if?it?already?exists
????????????????????while?True:
????????????????????????data[6]?=?word_freqs.readline（）.strip（）
????????????????????????if?data[6]?==?‘‘:
????????????????????????????break;
????????????????????????data[7]?=?int（data[6].split（‘‘）[1]）
????????????????????????#?word?no?white?space
????????????????????????data[6]?=?data[6].split（‘‘）[0].strip（）?
????????????????????????if?data[5]?==

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件?????????54??2017-08-22?16:44??《編程風(fēng)格：好代碼的邏輯》隨書代碼\.gitignore

?????文件????????497??2017-08-22?16:44??《編程風(fēng)格：好代碼的邏輯》隨書代碼\01-good-old-times\README.md

?????文件???????4677??2017-08-22?16:44??《編程風(fēng)格：好代碼的邏輯》隨書代碼\01-good-old-times\tf-01.py

?????文件???????6144??2017-08-22?16:44??《編程風(fēng)格：好代碼的邏輯》隨書代碼\02-go-forth\forth.py

?????文件????????740??2017-08-22?16:44??《編程風(fēng)格：好代碼的邏輯》隨書代碼\02-go-forth\README.md

?????文件???????3466??2017-08-22?16:44??《編程風(fēng)格：好代碼的邏輯》隨書代碼\02-go-forth\tf-02.py

?????文件????????157??2017-08-22?16:44??《編程風(fēng)格：好代碼的邏輯》隨書代碼\03-monolith\README.md

?????文件???????1817??2017-08-22?16:44??《編程風(fēng)格：好代碼的邏輯》隨書代碼\03-monolith\tf-03.py

?????文件????????237??2017-08-22?16:44??《編程風(fēng)格：好代碼的邏輯》隨書代碼\04-cookbook\README.md

?????文件???????1846??2017-08-22?16:44??《編程風(fēng)格：好代碼的邏輯》隨書代碼\04-cookbook\tf-04.py

?????文件????????103??2017-08-22?16:44??《編程風(fēng)格：好代碼的邏輯》隨書代碼\05-pipeline\Makefile

?????文件????????307??2017-08-22?16:44??《編程風(fēng)格：好代碼的邏輯》隨書代碼\05-pipeline\README.md

?????文件???????1217??2017-08-22?16:44??《編程風(fēng)格：好代碼的邏輯》隨書代碼\05-pipeline\tf-05.clj

?????文件???????3561??2017-08-22?16:44??《編程風(fēng)格：好代碼的邏輯》隨書代碼\05-pipeline\tf-05.cpp

?????文件???????1978??2017-08-22?16:44??《編程風(fēng)格：好代碼的邏輯》隨書代碼\05-pipeline\tf-05.py

?????文件????????248??2017-08-22?16:44??《編程風(fēng)格：好代碼的邏輯》隨書代碼\05-pipeline\tf-09.sh

?????文件????????131??2017-08-22?16:44??《編程風(fēng)格：好代碼的邏輯》隨書代碼\06-code-golf\README.md

?????文件????????431??2017-08-22?16:44??《編程風(fēng)格：好代碼的邏輯》隨書代碼\06-code-golf\tf-06-1.py

?????文件????????663??2017-08-22?16:44??《編程風(fēng)格：好代碼的邏輯》隨書代碼\06-code-golf\tf-06-bm.py

?????文件????????371??2017-08-22?16:44??《編程風(fēng)格：好代碼的邏輯》隨書代碼\06-code-golf\tf-06-pn.py

?????文件????????418??2017-08-22?16:44??《編程風(fēng)格：好代碼的邏輯》隨書代碼\06-code-golf\tf-06.clj

?????文件????????249??2017-08-22?16:44??《編程風(fēng)格：好代碼的邏輯》隨書代碼\06-code-golf\tf-06.py

?????文件????????249??2017-08-22?16:44??《編程風(fēng)格：好代碼的邏輯》隨書代碼\06-code-golf\tf-06.rb

?????文件????????872??2017-08-22?16:44??《編程風(fēng)格：好代碼的邏輯》隨書代碼\06-code-golf\tf-06.scala

?????文件????????250??2017-08-22?16:44??《編程風(fēng)格：好代碼的邏輯》隨書代碼\07-infinite-mirror\README.md

?????文件???????1380??2017-08-22?16:44??《編程風(fēng)格：好代碼的邏輯》隨書代碼\07-infinite-mirror\tf-07.py

?????文件????????614??2017-08-22?16:44??《編程風(fēng)格：好代碼的邏輯》隨書代碼\08-kick-forward\README.md

?????文件???????1199??2017-08-22?16:44??《編程風(fēng)格：好代碼的邏輯》隨書代碼\08-kick-forward\tf-08.py

?????文件????????725??2017-08-22?16:44??《編程風(fēng)格：好代碼的邏輯》隨書代碼\09-the-one\README.md

?????文件???????1008??2017-08-22?16:44??《編程風(fēng)格：好代碼的邏輯》隨書代碼\09-the-one\tf-04-fold.scala

............此處省略117個文件信息