Strange Characters in JSON returned string

[fioranosnake]

Hi,

I'm getting some strange characters at the beginning of an string that I am setting up for a request payload.

In this example I am trying to read a text file containing one data item and then enumerate it.

with open('list.txt', 'r') as f:
             d = {k: v.strip() for (k, v) in enumerate(f, start=1)}
             data = json.dumps(d)
    
             with open('out.txt', 'w') as f_out:  
             f_out.write(data)

the resulting out.txt contains

{"1": "\u00ef\u00bb\u00bf10841911101489"}

the return should read :

{"1": "10841911101489"}

Can anyone help please?

Many thanks,

Fiorano