add disable_cachew helper

my/core/cachew.py

@@ -0,0 +1,29 @@
+'''
+# TODO this probably belongs to cachew? or cachew.experimental
+'''
+from contextlib import contextmanager
+
+
+def disable_cachew():
+    '''
+    NOTE: you need to use it before importing any function using @cachew.cachew
+    '''
+    # TODO not sure... maybe it should instead use some hook.. it's a ibt ugly do
+    import cachew
+
+    @cachew.doublewrap
+    def cachew_off(func=None, *args, **kwargs):
+        return func
+    old = cachew.cachew
+    cachew.cachew = cachew_off
+    return old
+
+
+@contextmanager
+def disabled_cachew():
+    import cachew
+    old = disable_cachew()
+    try:
+        yield
+    finally:
+        cachew.cachew = old

my/core/time.py

@@ -11,6 +11,6 @@ tz_lookup = {
 tz_lookup['UTC'] = pytz.utc # ugh. otherwise it'z Zulu...
 
 
-@lru_cache(-1)
+@lru_cache(None)
 def abbr_to_timezone(abbr: str):
     return tz_lookup[abbr]

my/takeout.py

@@ -2,30 +2,25 @@ from pathlib import Path
 from typing import Optional
 
 from .common import get_files
+from .kython.kompress import kopen, kexists
 
 from my.config import google as config
 
-from .kython.kompress import kopen
-
 def get_last_takeout(*, path: Optional[str]=None) -> Path:
     """
     Ok, sometimes google splits takeout into two zip archives
     I guess I could detect it (they've got 001/002 etc suffixes), but fornow that works fine..
     """
+    # TODO FIXME zip is not great..
+    # allow a lambda expression? that way the user could restrict it
     for takeout in reversed(get_files(config.takeout_path, glob='*.zip')):
-        if path is None:
+        if path is None or kexists(takeout, path):
             return takeout
         else:
-            try:
-                kopen(takeout, path)
-                return takeout
-            except:
-                # TODO eh, a bit horrible, but works for now..
-                # TODO move ot kompress? 'kexists'?
             continue
     raise RuntimeError(f'Not found: {path}')
 
-# TODO might be a good idea to merge across multiple taekouts...
+# TODO might be a good idea to merge across multiple takeouts...
 # perhaps even a special takeout module that deals with all of this automatically?
 # e.g. accumulate, filter and maybe report useless takeouts?