Copying files in python 2.7

Question

Ok well i have another question. I implemented the error checking but for some reason it still isn't working. I still get a python error instead of the error i just wrote in the program.

Traceback (most recent call last):
  File "E:/python/copyfile.py", line 31, in <module>
    copyFile()
  File "E:/python/copyfile.py", line 8, in copyFile
    file1 = open(source,"r")
IOError: [Errno 2] No such file or directory: 'C:/Users/Public/asdf.txt'

So, what does your program do when you pass in an invalid filename? That should give you an idea of what to look for as you attempt to read/write files. Do you know how to implement exception-handling? If not, do a quick Google on 'python exception handling' and see what you can come up with. Good luck :) — bedwyr
– bedwyr, Commented Dec 16, 2013 at 17:16
Traceback (most recent call last): File "<pyshell#7>", line 1, in <module> copyFile() File "E:/python/copyfile.py", line 6, in copyFile file1 = open(source,"r") IOError: [Errno 2] No such file or directory: '/Users/Public/asdf.txt' This is the error I get. — Aegg
– Aegg, Commented Dec 16, 2013 at 17:17
Alright I figured it out... thanks to you guys :) The problem was that I had my try and except statements all in the wrong places. With a quick move the problem was quickly resolved. Thank you guys again. — Aegg
– Aegg, Commented Dec 16, 2013 at 19:27

Corey Goldberg · Accepted Answer · 2013-12-16 17:16:19Z

9

check out the shutil module in standard library:

shutil.copyfile(src, dst)

http://docs.python.org/2/library/shutil.html#shutil.copyfile

answered Dec 16, 2013 at 17:16

Corey Goldberg

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1 Comment

Aegg Over a year ago

I'm not allowed to use any built in functions. anyways, i got it updated... but apparently the check still isn't quite right..

Siva Cn · Accepted Answer · 2013-12-16 17:46:46Z

I would rather ask you to write your own:

import os
import hashlib

def md5ChkSum(_file):  # Calculates MD5 CheckSum
    with open(_file, 'rb') as fp:
        hash_obj = hashlib.md5()

        line = fp.readline()
        while line:
            hash_obj.update(line)
            line = fp.readline()
        return hash_obj.hexdigest()

def copier(_src, _dst):
    if not os.path.exists(_src):
        return False

    _src_fp = open(_src, "r")
    _dst_fp = open(_dst, "w")

    line = _src_fp.readline()
    while line:
        _dst_fp.write(line)
        line = _src_fp.readline()
    _src_fp.close()
    _dst_fp.close()

    if md5ChkSum(_src) == md5ChkSum(_dst):
        return "Copy: SUCCESSFUL"
    return "Copy: FAILED"

res = copier(r"/home/cnsiva/6.jpg", r"/home/cnsiva/6_copied.jpg")
if not res:
    print "FILE Does not Exists !!!"
else: print res

OUTPUT:

Copy: SUCCESSFUL

@khachik, Does it make any trouble, here we are not stick to the stylings. Check for the Functionality !!!
for the functionality there is shutil, no need to reinvent it.
shutil is not built-in and I don't see anything about built-ins in the question as well.

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