sources and symbols listing has a formatting helper.

src/pricehist/cli.py

@@ -41,13 +41,14 @@ def cli(args=None, output_file=sys.stdout):
     logging.debug(f"Finished pricehist run at {datetime.now()}.")
 
 
+def _format_pairs(pairs, gap=4):
+    width = max([len(a) for a, b in pairs])
+    lines = [a.ljust(width + gap) + b for a, b in pairs]
+    return "\n".join(lines)
+
+
 def cmd_sources(args):
-    width = max([len(identifier) for identifier in sources.by_id.keys()])
-    source_lines = [
-        f"{identifier.ljust(width)}  {source.name()}"
-        for identifier, source in sources.by_id.items()
-    ]
-    return "\n".join(source_lines)
+    return _format_pairs([(s.id(), s.name()) for k, s in sorted(sources.by_id.items())])
 
 
 def cmd_source(args):
@@ -75,7 +76,7 @@ def cmd_source(args):
     source = sources.by_id[args.identifier]
 
     if args.symbols:
-        return "\n".join(source.symbols())
+        return _format_pairs(source.symbols())
     else:
         k_width = 11
         total_width = shutil.get_terminal_size().columns

src/pricehist/sources/basesource.py

@@ -36,7 +36,7 @@ class BaseSource(ABC):
         pass
 
     @abstractmethod
-    def symbols(self) -> list[str]:
+    def symbols(self) -> list[(str, str)]:
         pass
 
     @abstractmethod

src/pricehist/sources/coindesk.py

@@ -39,10 +39,10 @@ class CoinDesk(BaseSource):
         response = self.log_curl(requests.get(url))
         data = json.loads(response.content)
         relevant = [i for i in data if i["currency"] not in ["XBT", "BTC"]]
-        symbols = sorted(
-            [f"BTC/{i['currency']}    Bitcoin against {i['country']}" for i in relevant]
-        )
-        return symbols
+        return [
+            (f"BTC/{i['currency']}", f"Bitcoin against {i['country']}")
+            for i in sorted(relevant, key=lambda i: i["currency"])
+        ]
 
     def fetch(self, series):
         data = self._data(series)

src/pricehist/sources/coinmarketcap.py

@@ -43,10 +43,8 @@ class CoinMarketCap(BaseSource):
     def symbols(self):
         data = self._symbol_data()
         ids = [f"id={i['id']}" for i in data]
-        id_width = max([len(id) for id in ids])
         descriptions = [f"{i['symbol'] or i['code']} {i['name']}".strip() for i in data]
-        rows = [i.ljust(id_width + 4) + d for i, d in zip(ids, descriptions)]
-        return rows
+        return list(zip(ids, descriptions))
 
     def fetch(self, series):
         data = self._data(series)

src/pricehist/sources/ecb.py

@@ -38,8 +38,7 @@ class ECB(BaseSource):
         nodes = root.cssselect("[currency]")
         currencies = sorted(set([n.attrib["currency"] for n in nodes]))
         iso = isocurrencies.by_code()
-        pairs = [f"EUR/{c}    Euro against {iso[c].name}" for c in currencies]
-        return pairs
+        return [(f"EUR/{c}", f"Euro against {iso[c].name}") for c in currencies]
 
     def fetch(self, series):
         almost_90_days_ago = str(datetime.now().date() - timedelta(days=85))