On 2023-02-19 19:31, Chris Angelico wrote:
On Mon, 20 Feb 2023 at 06:24, Thomas Passin <li...@tompassin.net> wrote:
On 2/19/2023 1:53 PM, Chris Angelico wrote:
> On Mon, 20 Feb 2023 at 03:41, Azizbek Khamdamov
> <azizbek.khamda...@gmail.com> wrote:
>>
>> Example 1 (works as expected)
>>
>> file = open("D:\Programming\Python\working_with_files\cities.txt",
>> 'r+') ## contains list cities
>
> Side note: You happened to get lucky with P, w, and c, but for the
> future, I recommend using forward slashes for your paths:
>
> open("D:/Programming/Python/working_with_files/cities.txt", "r+")
>
> Otherwise, you may run into annoying and hard-to-solve problems. Or
> alternatively, you'll upgrade to a newer Python and start getting
> warnings, which would at least tell you that there's a problem.
Or use r'...' strings. If you are copying a path to clipboard from
Windows Explorer - a fairly common operation - it's much easier to
prepend the "r" than to change all the backslashes to forward slashes.
Yep, either way. I personally prefer using forward slashes since
there's no way to end an r-string with a single backslash, which is
often useful when building a path:
# won't work
path = r"c:\path\to\some\"
open(path + "file")
# will work
path = "c:/path/to/some/"
open(path + "file")
When I build a path, I use os.path.join, so it's only a problem if one
of the strings refers to the root of a drive, e.g. "C:\\".
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