On 21/04/2012 02:03, Foster Rilindo wrote:
I can't seem to concatenate.
I got binary files here:
yvaine:disk rilindo$ ls -lah
total 61440
drwxr-xr-x 4 rilindo staff 136B Apr 20 19:47 .
drwxr-xr-x 10 rilindo staff 340B Apr 20 19:45 ..
-rw-r--r-- 1 rilindo staff 20M Apr 20 20:00 disk1
-rw-r--r-- 1 rilindo staff 10M Apr 20 19:47 disk2
Based on the following code, I should be able to cat disk2 over to disk 1,
resulting in a 30 Meg file:
import shutil
import os
disk1="/Users/rilindo/tmp/disk/disk1"
disk2="/Users/rilindo/tmp/disk/disk2"
destination = open(disk1,'wb')
shutil.copyfileobj(open(disk2,'rb'),destination)
destination.close()
However, the result is that the destination gets overwritten:
yvaine:disk rilindo$ ls -lah
total 40960
drwxr-xr-x 4 rilindo staff 136B Apr 20 19:47 .
drwxr-xr-x 10 rilindo staff 340B Apr 20 19:45 ..
-rw-r--r-- 1 rilindo staff 10M Apr 20 20:02 disk1
-rw-r--r-- 1 rilindo staff 10M Apr 20 19:47 disk2
Is this right way to concatenate a file or is there a better way?
It's "rb" to read binary, "wb" to write binary, truncating the existing
file, and "ab" to append binary.
You want to append binary.
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