10.11.20 11:07, Manfred Lotz пише:
> Perhaps better. I like to use os.scandir this way
>
> def scantree(path: str) -> Iterator[os.DirEntry[str]]:
> """Recursively yield DirEntry objects (no directories)
> for a given directory.
> """
> for entry in os.scandir(path):
>
10.11.20 22:40, Dennis Lee Bieber пише:
> Testing for extension in a list of exclusions would be much faster than
> scanning the contents of a file, and the few that do get through would have
> to be scanned anyway.
Then the simplest method should work: read the first 512 bytes and check
if
On Wed, Nov 11, 2020 at 10:00 AM Cameron Simpson wrote:
>
> On 11Nov2020 07:30, Chris Angelico wrote:
> >If the script's assuming it'll mostly work on small text files, it
> >might be very annoying to suddenly read in a 4GB blob of video file
> >just to find out that it's not text.
>
> You can ab
On 11Nov2020 07:30, Chris Angelico wrote:
>If the script's assuming it'll mostly work on small text files, it
>might be very annoying to suddenly read in a 4GB blob of video file
>just to find out that it's not text.
You can abort as soon as the decode fails. Which will usually be pretty
early f
On 11Nov2020 07:25, Chris Angelico wrote:
>If the main job of the program, as in this situation, is to read the
>entire file, I would probably have it read in the first 1KB or 16KB or
>thereabouts, see if that has any NUL bytes, and if not, proceed to
>read in the rest of the file. But depending o
On Wed, Nov 11, 2020 at 6:52 AM Barry Scott wrote:
>
>
>
> > On 10 Nov 2020, at 19:30, Eli the Bearded <*@eli.users.panix.com> wrote:
> >
> > In comp.lang.python, Chris Angelico wrote:
> >> Eli the Bearded <*@eli.users.panix.com> wrote:
> >>> Read first N lines of a file. If all parse as valid UT
On Wed, Nov 11, 2020 at 6:36 AM Eli the Bearded <*@eli.users.panix.com> wrote:
>
> In comp.lang.python, Chris Angelico wrote:
> > Eli the Bearded <*@eli.users.panix.com> wrote:
> >> Read first N lines of a file. If all parse as valid UTF-8, consider it
> >> text.
> >> That's probably the rough me
> On 10 Nov 2020, at 19:30, Eli the Bearded <*@eli.users.panix.com> wrote:
>
> In comp.lang.python, Chris Angelico wrote:
>> Eli the Bearded <*@eli.users.panix.com> wrote:
>>> Read first N lines of a file. If all parse as valid UTF-8, consider it text.
>>> That's probably the rough method file
In comp.lang.python, Chris Angelico wrote:
> Eli the Bearded <*@eli.users.panix.com> wrote:
>> Read first N lines of a file. If all parse as valid UTF-8, consider it text.
>> That's probably the rough method file(1) and Perl's -T use. (In
>> particular allow no nulls. Maybe allow ISO-8859-1.)
> IS
On Tue, 10 Nov 2020 10:57:05 +0100
"Loris Bennett" wrote:
> Manfred Lotz writes:
>
> > On Tue, 10 Nov 2020 08:19:55 +0100
> > "Loris Bennett" wrote:
> >
> >> Manfred Lotz writes:
> >>
> >> > I have a situation where in a directory tree I want to change a
> >> > certain string in all file
On Tue, 10 Nov 2020 22:08:54 +1100
Cameron Simpson wrote:
> On 10Nov2020 10:07, Manfred Lotz wrote:
> >On Tue, 10 Nov 2020 18:37:54 +1100
> >Cameron Simpson wrote:
> >> Use os.walk for trees. scandir does a single directory.
> >
> >Perhaps better. I like to use os.scandir this way
> >
> >de
On Wed, Nov 11, 2020 at 5:36 AM Eli the Bearded <*@eli.users.panix.com> wrote:
> Read first N lines of a file. If all parse as valid UTF-8, consider it text.
> That's probably the rough method file(1) and Perl's -T use. (In
> particular allow no nulls. Maybe allow ISO-8859-1.)
>
ISO-8859-1 is basi
In comp.lang.python, Loris Bennett wrote:
> Manfred Lotz writes:
> > My idea was to do
> >
> > - os.scandir and for each file
> >- check if a file is a text file
^^
> >- if it is not a text file skip that file
> >- change the string as often as it
On 2020-11-10, Manfred Lotz wrote:
> What is the best way to check if a file is a text file?
Step 1: define "text file"
--
Grant
--
https://mail.python.org/mailman/listinfo/python-list
On 10Nov2020 10:07, Manfred Lotz wrote:
>On Tue, 10 Nov 2020 18:37:54 +1100
>Cameron Simpson wrote:
>> Use os.walk for trees. scandir does a single directory.
>
>Perhaps better. I like to use os.scandir this way
>
>def scantree(path: str) -> Iterator[os.DirEntry[str]]:
>"""Recursively yield D
On Tue, Nov 10, 2020 at 9:06 PM Manfred Lotz wrote:
> The reason I want to check if a file is a text file is that I don't
> want to try replacing patterns in binary files (executable binaries,
> archives, audio files aso).
>
I'd recommend two checks, then:
1) Can the file be decoded as UTF-8?
2)
On Tue, 10 Nov 2020 18:52:26 +1100
Mike Dewhirst wrote:
> On 10/11/2020 5:24 pm, Manfred Lotz wrote:
> > I have a situation where in a directory tree I want to change a
> > certain string in all files where that string occurs.
> >
> > My idea was to do
> >
> > - os.scandir and for each file
> >
On Tue, 10 Nov 2020 18:37:54 +1100
Cameron Simpson wrote:
> On 10Nov2020 07:24, Manfred Lotz wrote:
> >I have a situation where in a directory tree I want to change a
> >certain string in all files where that string occurs.
> >
> >My idea was to do
> >
> >- os.scandir and for each file
>
> Us
Manfred Lotz writes:
> On Tue, 10 Nov 2020 08:19:55 +0100
> "Loris Bennett" wrote:
>
>> Manfred Lotz writes:
>>
>> > I have a situation where in a directory tree I want to change a
>> > certain string in all files where that string occurs.
>> >
>> > My idea was to do
>> >
>> > - os.scandir and
On Tue, 10 Nov 2020 08:19:55 +0100
"Loris Bennett" wrote:
> Manfred Lotz writes:
>
> > I have a situation where in a directory tree I want to change a
> > certain string in all files where that string occurs.
> >
> > My idea was to do
> >
> > - os.scandir and for each file
> >- check if a f
Loris Bennett wrote:
> Having said that, I would be interested to know what the most compact
> way of doing the same thing in Python might be.
>
Here's my Python replace script:-
#!/usr/bin/python3
#
#
# String replacement utility
#
import os
import re
import sys
import shutil
def replaceStrin
On 10/11/2020 5:24 pm, Manfred Lotz wrote:
I have a situation where in a directory tree I want to change a certain
string in all files where that string occurs.
My idea was to do
- os.scandir and for each file
- check if a file is a text file
- if it is not a text file skip that file
On 10Nov2020 07:24, Manfred Lotz wrote:
>I have a situation where in a directory tree I want to change a certain
>string in all files where that string occurs.
>
>My idea was to do
>
>- os.scandir and for each file
Use os.walk for trees. scandir does a single directory.
> - check if a file is
Manfred Lotz writes:
> I have a situation where in a directory tree I want to change a certain
> string in all files where that string occurs.
>
> My idea was to do
>
> - os.scandir and for each file
>- check if a file is a text file
>- if it is not a text file skip that file
>- chang
I have a situation where in a directory tree I want to change a certain
string in all files where that string occurs.
My idea was to do
- os.scandir and for each file
- check if a file is a text file
- if it is not a text file skip that file
- change the string as often as it occurs in t
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