Add string representations for env and keypair

kin/blockchain/environment.py

@@ -29,3 +29,9 @@ def __init__(self, name, horizon_endpoint_uri, network_passphrase, friendbot_url
 
         # Calculate the hash of the passphrase, can be used to calculate tx hash.
         self.passphrase_hash = sha256(network_passphrase.encode()).digest()
+
+    def __str__(self):
+        string_representation = '<Kin Environment>: Name: {}, ' \
+                                'Horizon: {}, ' \
+                                'Passphrase: {}'.format(self.name, self.horizon_uri, NETWORKS[self.name.upper()])
+        return string_representation

kin/blockchain/keypair.py

@@ -68,3 +68,7 @@ def generate_hd_seed(base_seed, salt):
         # Create a new raw seed from this hash
         raw_seed = sha256((base_seed + salt).encode()).digest()
         return BaseKeypair.from_raw_seed(raw_seed).seed().decode()
+
+    def __str__(self):
+        string_representation = '<Kin Keypair>: Address: {}, Seed: {}'.format(self.public_address, self.secret_seed)
+        return string_representation

kin/version.py

@@ -1 +1 @@
-__version__ = "2.3.0"
+__version__ = "2.3.1"