import?sys

filename?=?sys.argv[1]

with?open（filename?‘rb‘）?as?hugefile:
????chunksize?=?1000
????readable?=?‘‘
????#?if?you?want?to?stop?after?certain?number?of?blocks?
????#?put?condition?in?the?while
????while?hugefile:??
????????#?if?you?want?to?start?not?from?1st?byte
????????#?do?a?hugefile.seek（skipbytes）?to?skip?
????????#?skipbytes?of?bytes?from?the?file?start
????????start?=?hugefile.tell（）
????????print?“starting?at:“?start
????????file_block?=?‘‘??#?holds?chunk_size?of?lines
????????for?_?in?range（start?start?+?chunksize）:
????????????line?=?hugefile.next（）
????????????file_block?=?file_block?+?line
????????????print?‘file_block‘?type（file_block）?file_block
????????readable?=?readable?+?file_block
????????#?tell?where?are?we?in?file
????????#?file?IO?is?usually?buffered?so?tell（）?will?not?be?precise?for
????????#?every?read.
????????stop?=?hugefile.tell（）
????????print?‘readable‘?type（readable）?readable
????????print?‘reading?bytes?from?%s?to?%s‘?%?（start?stop）
????????print?‘read?bytes?total:‘?len（readable）
????????
????????raw_input（）

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2017-12-04?14:25??python?數據可視化編程實戰\
?????目錄???????????0??2013-11-20?14:19??python?數據可視化編程實戰\3367OS_Code\
?????目錄???????????0??2013-11-20?14:10??python?數據可視化編程實戰\3367OS_Code\3367OS_02_Code\
?????文件????????1076??2013-02-16?18:20??python?數據可視化編程實戰\3367OS_Code\3367OS_02_Code\ch02-chunk-read.py
?????文件?????????710??2013-03-03?18:40??python?數據可視化編程實戰\3367OS_Code\3367OS_02_Code\ch02-clean-boxplot.py
?????文件?????????398??2013-03-03?19:18??python?數據可視化編程實戰\3367OS_Code\3367OS_02_Code\ch02-clean-log.py
?????文件????????1311??2013-03-03?18:03??python?數據可視化編程實戰\3367OS_Code\3367OS_02_Code\ch02-clean-mad.py
?????文件?????????515??2013-01-27?20:02??python?數據可視化編程實戰\3367OS_Code\3367OS_02_Code\ch02-csvread.py
?????文件?????????287??2013-01-25?01:51??python?數據可視化編程實戰\3367OS_Code\3367OS_02_Code\ch02-csvwrite.py
?????文件?????????136??2013-02-05?04:12??python?數據可視化編程實戰\3367OS_Code\3367OS_02_Code\ch02-data-dirty.tab
?????文件?????????141??2017-11-16?18:13??python?數據可視化編程實戰\3367OS_Code\3367OS_02_Code\ch02-data-write.csv
?????文件?????????141??2013-02-05?03:43??python?數據可視化編程實戰\3367OS_Code\3367OS_02_Code\ch02-data-write.tab
?????文件?????????119??2013-01-27?19:17??python?數據可視化編程實戰\3367OS_Code\3367OS_02_Code\ch02-data.csv
?????文件?????????130??2013-02-05?03:24??python?數據可視化編程實戰\3367OS_Code\3367OS_02_Code\ch02-data.tab
?????文件????????3322??2013-02-24?02:13??python?數據可視化編程實戰\3367OS_Code\3367OS_02_Code\ch02-export.py
?????文件????24356284??2013-03-05?12:30??python?數據可視化編程實戰\3367OS_Code\3367OS_02_Code\ch02-fixed-width-1M.data
?????文件?????????371??2013-02-05?02:28??python?數據可視化編程實戰\3367OS_Code\3367OS_02_Code\ch02-fixedwidth-read.py
?????文件?????????298??2013-02-05?02:12??python?數據可視化編程實戰\3367OS_Code\3367OS_02_Code\ch02-generate_f_data.py
?????文件?????????179??2013-02-26?00:13??python?數據可視化編程實戰\3367OS_Code\3367OS_02_Code\ch02-imgread-matplotlib.py
?????文件?????????129??2013-02-28?23:19??python?數據可視化編程實戰\3367OS_Code\3367OS_02_Code\ch02-imgshow-lena.py
?????文件?????????230??2013-03-01?00:24??python?數據可視化編程實戰\3367OS_Code\3367OS_02_Code\ch02-imgshow-pil.py
?????文件?????????534??2013-03-01?02:17??python?數據可視化編程實戰\3367OS_Code\3367OS_02_Code\ch02-imgshow-zoom.py
?????文件?????????334??2013-02-10?22:14??python?數據可視化編程實戰\3367OS_Code\3367OS_02_Code\ch02-jsonread-github.py
?????文件?????????291??2013-03-04?00:36??python?數據可視化編程實戰\3367OS_Code\3367OS_02_Code\ch02-noise-median-filter.py
?????文件?????????460??2013-03-04?01:01??python?數據可視化編程實戰\3367OS_Code\3367OS_02_Code\ch02-noise-moving-average.py
?????文件????????2441??2013-03-03?23:53??python?數據可視化編程實戰\3367OS_Code\3367OS_02_Code\ch02-noise-scipy-smooth-1d.py
?????文件????????3552??2013-03-03?14:39??python?數據可視化編程實戰\3367OS_Code\3367OS_02_Code\ch02-random-distributions.py
?????文件?????????572??2013-03-03?13:36??python?數據可視化編程實戰\3367OS_Code\3367OS_02_Code\ch02-random-random.py
?????文件?????????377??2013-03-02?19:03??python?數據可視化編程實戰\3367OS_Code\3367OS_02_Code\ch02-random-systemrandom.py
?????文件?????????440??2013-03-03?13:45??python?數據可視化編程實戰\3367OS_Code\3367OS_02_Code\ch02-random-timeseries.py
?????文件?????????562??2013-02-17?21:21??python?數據可視化編程實戰\3367OS_Code\3367OS_02_Code\ch02-sqlite-import.py
............此處省略97個文件信息