Add latest rates

Author: dannyp11

README.md

@@ -14,6 +14,13 @@ client = exchangerate.ExchangerateClient()
 print(client.symbols())
 ```
 
+- Get latest rates
+```
+import exchangerate
+client = exchangerate.ExchangerateClient()
+print(client.latest())
+```
+
 ## Configuration
 - 
 

src/exchangerate/client.py

@@ -9,20 +9,37 @@ class ExchangerateClient:
     """
     Primary client class
     """
-    def __init__(self, base_currency="USD", region=Region.AMERICA):
+    def __init__(self, base_currency="USD", server_region=Region.AMERICA):
         self.base_currency = base_currency
-        self.region = region
+        self.server_region = server_region
         self.session = requests.Session()
 
     # -------------------------------------------------------------------
     # Public methods
     # -------------------------------------------------------------------
 
     def symbols(self):
+        """
+        Get list of supported symbols
+        """
         url = self._build_url(path="symbols")
         resp_json = self._validate_and_get_json(url)
         return resp_json.get("rates")
 
+    def latest(self, symbols=None, amount=1):
+        """
+        Get latest rate
+
+        @param symbols:     list of currencies
+        @param amount:      the currency amount
+        """
+        params = {"amount": amount}
+        if symbols: params["symbols"] = ",".join(symbols)
+
+        url = self._build_url(path="latest", params=params)
+        resp_json = self._validate_and_get_json(url)
+        return resp_json.get("rates")
+
     # -------------------------------------------------------------------
     def _validate_and_get_json(self, url):
             resp = self.session.get(url)
@@ -47,7 +64,7 @@ def _build_url(self, path="", params=None):
         return urlunparse(
             Components(
                 scheme='https',
-                netloc=self.region.value,
+                netloc=self.server_region.value,
                 query=urlencode(params),
                 path=path,
                 url="/",

tests/test_client.py

@@ -1,9 +1,20 @@
+import pytest
 from exchangerate.client import ExchangerateClient
 
+def assert_currency_exist(result):
+    for currency in ["USD", "CAD", "AUD"]:
+        assert currency in result
+
 def test_get_symbols():
     client = ExchangerateClient()
     all_symbols = client.symbols()
+    assert_currency_exist(all_symbols)
+
+def test_get_latest_rate():
+    client = ExchangerateClient()
+    assert_currency_exist(client.latest())
+    assert_currency_exist(client.latest(amount=5))
 
-    assert "USD" in all_symbols
-    assert "CAD" in all_symbols
-    assert "AUD" in all_symbols
+    selected_rates = client.latest(symbols=["JPY", "CHF"], amount=5)
+    assert "JPY" in selected_rates
+    assert "CHF" in selected_rates