Simplify old UUID code.

src/qkit/storage/hdf_DateTimeGenerator.py

@@ -10,8 +10,7 @@
 import os
 import time
 import qkit
-
-alphabet = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+import numpy as np
 
 
 class DateTimeGenerator(object):
@@ -72,41 +71,9 @@ def new_filename_v2(self, name):
         )
 
 
-def encode_uuid(value):
-    """Encodes the integer unix timestamp into a 6 digit UUID using the alphabet.
-
-    Args:
-        Integer-cast unix timestamp.
-    Return:
-        6 digit UUID string.
-    """
-    # if not value: value = self._unix_timestamp
-    output = ''
-    la = len(alphabet)
-    while value:
-        output += alphabet[value % la]
-        value = int(value / la)
-    return output[::-1]
+def encode_uuid(value: int) -> str:
+    return np.base_repr(value, base=36)
 
 
-def decode_uuid(string):
-    """Decodes the 6 digit UUID back into integer unix timestamp.
-
-    Args:
-        6 digit UUID string.        
-    Return:
-        Integer-cast unix timestamp.
-    """
-    # if not string: string = self._uuid
-    output = 0
-    multiplier = 1
-    string = string[::-1].upper()
-    la = len(alphabet)
-    while string != '':
-        f = alphabet.find(string[0])
-        if f == -1:
-            raise ValueError("Can not decode this: {}<--".format(string[::-1]))
-        output += f * multiplier
-        multiplier *= la
-        string = string[1:]
-    return output
+def decode_uuid(string: str) -> int:
+    return int(string, 36)