.tcx file: ParseError: XML or text declaration not at start of entity

[roboes]

I am having the following problem with .tcx files:

ParseError: XML or text declaration not at start of entity: line 1, column 10

Seems that all my .tcx files have 10 blank spaces before the <?xml argument.

Is there any possible workaround for reading such .tcx files?

Here's an example: test.txt (file extension was changed to .txt due to GitHub limitations and needs to be changed to .tcx).

Thanks!

[roboes]

I have found a workaround to solve this issue: open all .tcx files from a given folder and remove (if any) leading blank spaces from the first row:

## Remove leading first line blank spaces of .tcx activity files
def tcx_lstrip():
    
    ## List of .tcx files to be imported
    activities_files_list = glob.glob(r'activities/*.tcx')
    
    ## Remove leading spaces from first row
    for index in activities_files_list:
    
        with open(file=index, mode='r') as f:
            lines = f.readlines()
            lines[0] = lines[0].lstrip()

        with open(file=index, mode='w') as f:
            f.writelines(lines)

This workaround was implemented in my strava-local-heatmap-tool script.

Still a native solution (without modifying the original .tcx file) would be ideal.