On Saturday, May 16, 2015 at 8:30:02 PM UTC+5:30, Grant Edwards wrote: > On 2015-05-16, bruceg113355 wrote: > > > I have a string that contains 10 million characters. > > > > The string is formatted as: > > > > "0000001 : some hexadecimal text ... \n > > 0000002 : some hexadecimal text ... \n > > 0000003 : some hexadecimal text ... \n > > ... > > 0100000 : some hexadecimal text ... \n > > 0100001 : some hexadecimal text ... \n" > > > > and I need the string to look like: > > > > "some hexadecimal text ... \n > > some hexadecimal text ... \n > > some hexadecimal text ... \n > > ... > > some hexadecimal text ... \n > > some hexadecimal text ... \n" > > > > I can split the string at the ":" then iterate through the list > > removing the first 8 characters then convert back to a string. This > > method works, but it takes too long to execute. > > > > Any tricks to remove the first n characters of each line in a string faster? > > Well, if the strings are all in a file, I'd probably just use sed: > > $ sed 's/^........//g' file1.txt >file2.txt > > or > > $ sed 's/^.*://g' file1.txt >file2.txt
And if they are not in a file you could start by putting them (it) there :-) Seriously... How does your 'string' come into existence? How/when do you get hold of it? -- https://mail.python.org/mailman/listinfo/python-list
