location: add all.py, using takeout/gpslogger/ip (#237)

* location: add all.py, using takeout/gpslogger/ip, update docs

my/location/all.py

@@ -0,0 +1,48 @@
+"""
+Merges location data from multiple sources
+"""
+
+from typing import Iterator
+
+from my.core import Stats, LazyLogger
+from my.core.source import import_source
+
+from my.location.via_ip import locations
+
+from .common import Location
+
+
+logger = LazyLogger(__name__, level="warning")
+
+
+def locations() -> Iterator[Location]:
+    # can add/comment out sources here to disable them, or use core.disabled_modules
+    yield from _takeout_locations()
+    yield from _gpslogger_locations()
+    yield from _ip_locations()
+
+
+@import_source(module_name="my.location.google_takeout")
+def _takeout_locations() -> Iterator[Location]:
+    from . import google_takeout
+    yield from google_takeout.locations()
+
+
+@import_source(module_name="my.location.gpslogger")
+def _gpslogger_locations() -> Iterator[Location]:
+    from . import gpslogger
+    yield from gpslogger.locations()
+
+
+@import_source(module_name="my.location.via_ip")
+def _ip_locations() -> Iterator[Location]:
+    from . import via_ip
+    yield from via_ip.locations()
+
+
+def stats() -> Stats:
+    from my.core import stat
+
+    return {
+        **stat(locations),
+    }