fix: download latest alias_key.json using request

resolves ModuleNotFoundError: No module named 'pango_designation' #2
thanks for the report and suggested fix @Wytamma

Author: corneliusroemer

src/pango_aliasor/aliasor.py

@@ -4,10 +4,12 @@ def __init__(self, alias_file=None):
         import json
 
         if alias_file is None:
-            import importlib.resources
+            import urllib.request, json
 
-            with importlib.resources.open_text("pango_designation", "alias_key.json") as file:
-                file = json.load(file)
+            with urllib.request.urlopen(
+                "https://raw.githubusercontent.com/cov-lineages/pango-designation/master/pango_designation/alias_key.json"
+            ) as data:
+                file = json.load(data)
 
         else:
             with open(alias_file) as file:
@@ -22,18 +24,18 @@ def __init__(self, alias_file=None):
 
         self.realias_dict = {v: k for k, v in self.alias_dict.items()}
 
-    def compress(self,name):
-        name_split = name.split('.')
+    def compress(self, name):
+        name_split = name.split(".")
         levels = len(name_split) - 1
-        num_indirections = (levels -1) // 3
+        num_indirections = (levels - 1) // 3
         if num_indirections <= 0:
             return name
-        alias = ".".join(name_split[0:(3*num_indirections + 1)])
-        ending = ".".join(name_split[(3*num_indirections + 1):])
-        return self.realias_dict[alias] + '.' + ending
+        alias = ".".join(name_split[0 : (3 * num_indirections + 1)])
+        ending = ".".join(name_split[(3 * num_indirections + 1) :])
+        return self.realias_dict[alias] + "." + ending
 
-    def uncompress(self,name):
-        name_split = name.split('.')
+    def uncompress(self, name):
+        name_split = name.split(".")
         letter = name_split[0]
         try:
             unaliased = self.alias_dict[letter]
@@ -42,7 +44,9 @@ def uncompress(self,name):
         if len(name_split) == 1:
             return name
         if len(name_split) == 2:
-            return unaliased + '.' + name_split[1]
+            return unaliased + "." + name_split[1]
         else:
-            return unaliased + '.' + ".".join(name_split[1:])
+            return unaliased + "." + ".".join(name_split[1:])
+
+
 # %%