mvp

README.md

+# TCX Speed Fixer
+
+Recorded a bike ride with the wrong tire circumference set in your Speed sensor?
+Given the circumference setting used to record the file, as well as the correct
+circumference, this script will correct the TCX file.
+
+
+## Requirements
+
+Python 3
+
+## Usage
+
+`fix_tcx.py <filename> <new_filename> <adjustment_factor>`
+
+To calculate the adjustment factor, just divide:
+
+`tire_circumference / recorded_tire_circumference`
+

fix_tcx.py

+#!/bin/env python3
+
+"""
+TCX Speed Fixer
+
+Usage: fix_tcx.py <filename> <new_filename> <adjustment_factor>
+
+Recorded a bike ride with the wrong tire circumference set in your Speed sensor?
+Given the circumference setting used to record the file, as well as the correct
+circumference, this script will correct the TCX file.
+"""
+
+from decimal import Decimal
+from numbers import Number
+import sys
+from xml.etree import ElementTree
+
+XMLNS = {
+    'tcx': 'http://www.garmin.com/xmlschemas/TrainingCenterDatabase/v2'}
+
+ElementTree.register_namespace('', 'http://www.garmin.com/xmlschemas/TrainingCenterDatabase/v2')
+
+def fix_tcx(filename: str,  new_filename: str, adjustment_factor: Number):
+    def _fix_activity(activity):
+        for lap in activity.findall('tcx:Lap', XMLNS):
+            _fix_lap(lap)
+
+    def _fix_lap(lap):
+        for track in lap.findall('tcx:Track', XMLNS):
+            _fix_track(track)
+
+    def _fix_track(track):
+        for trackpoint in track.findall('tcx:Trackpoint', XMLNS):
+            _fix_trackpoint(trackpoint)
+
+    def _fix_trackpoint(trackpoint):
+        distance = trackpoint.find('tcx:DistanceMeters', XMLNS)
+        distance.text = str(Decimal(distance.text) * adjustment_factor)
+
+    tree = ElementTree.parse(filename)
+    root = tree.getroot()
+    activities = root.find('tcx:Activities', XMLNS)
+    for activity in activities.findall('tcx:Activity', XMLNS):
+        _fix_activity(activity)
+    tree.write(new_filename)
+
+if __name__ == '__main__':
+    try:
+        fix_tcx(sys.argv[1], sys.argv[2], Decimal(sys.argv[3]))
+    except IndexError:
+        print(__doc__)