File write, weird behaviour

[Thomas Passin]

On 2/19/2023 1:53 PM, Chris Angelico wrote:
> On Mon, 20 Feb 2023 at 03:41, Azizbek Khamdamov
> <azizbek.khamdamov at 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.