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splitfile.py
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splitfile.py
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# -*- coding: utf-8 -*-
"""
Created on Fri Nov 9 13:48:53 2018
@author: TonyY
"""
import os
TEMP_PATH = 'temp/'
DOWNLOAD_PATH = 'download/'
class BreakLoop(Exception):
pass
def splitFile(filepath, fileno=3):
if not os.path.exists(TEMP_PATH):
os.makedirs(TEMP_PATH)
filename = os.path.basename(filepath)
tempfilepath = TEMP_PATH + filename
with open(filepath, 'rb') as rawfile:
try:
files = [open(tempfilepath +'.00%d' % i, 'wb') for i in range(fileno)]
for i, line in enumerate(rawfile):
files[i % fileno].write(line)
return [file.name for file in files]
except IOError:
print("Unable to create file on disk.")
finally:
for f in files:
f.close()
def joinFiles(tempfilepaths):
if not os.path.exists(DOWNLOAD_PATH):
os.makedirs(DOWNLOAD_PATH)
tempfilepaths.sort()
filename = os.path.basename(tempfilepaths[0])[0:-4]
with open(DOWNLOAD_PATH + filename, 'wb') as rawfile:
try:
files = [open(tempfilepath, 'rb') for tempfilepath in tempfilepaths]
try:
while True:
for file in files:
line = file.readline()
if not line:
raise BreakLoop()
rawfile.write(line)
except BreakLoop:
pass
except IOError:
print("Unable to create file on disk.")
finally:
for file in files:
file.close()