[SOLVED] Why does regex fail cleaning line?

[Gribouillis]

This works as long as there is no > in the part that you want to remove

import re

src = """\
<?xml version="1.0" encoding="UTF-8"?>
<gpx 
 xmlns="http://www.topografix.com/GPX/1/1" 
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
 xsi:schemaLocation="http://www.topografix.com/GPX/1/1 http://www.topografix.com/GPX/1/1/gpx.xsd" 
 version="1.1">
 <trk>
  <trkseg>
   <trkpt lat="45.649872" lon="0.156119"><ele>101.25</ele></trkpt>
      <trkpt lat="43.929379" lon="2.147619"><ele>178</ele></trkpt>
   <trkpt lat="43.929388" lon="2.147699"><ele>177.75</ele></trkpt>
  </trkseg>
 </trk>
</gpx>
"""

res = re.sub(r'<gpx\b[^>]*>', '<gpx>', src)
print(res)

Output:
<?xml version="1.0" encoding="UTF-8"?>
<gpx>
 <trk>
  <trkseg>
   <trkpt lat="45.649872" lon="0.156119"><ele>101.25</ele></trkpt>
      <trkpt lat="43.929379" lon="2.147619"><ele>178</ele></trkpt>
   <trkpt lat="43.929388" lon="2.147699"><ele>177.75</ele></trkpt>
  </trkseg>
 </trk>
</gpx>