Auto web3

web3/auto/__init__.py

@@ -0,0 +1,9 @@
+import importlib
+
+for connector in ('ipc', 'http'):
+    connection = importlib.import_module('web3.auto.' + connector)
+    if connection.w3:
+        w3 = connection.w3
+
+        if w3.isConnected():
+            break

web3/auto/http.py

@@ -0,0 +1,19 @@
+from web3 import (
+    HTTPProvider,
+    Web3
+)
+import os
+
+
+def connect():
+
+    w3 = Web3(HTTPProvider(
+        os.environ.get('WEB3_HTTP_PROVIDER_URI', 'http://localhost:8545')
+    ))
+    if w3.isConnected():
+        return w3
+    else:
+        return False
+
+
+w3 = connect()

web3/auto/ipc.py

@@ -0,0 +1,16 @@
+from web3.providers.ipc import get_default_ipc_path
+from web3 import (
+    IPCProvider,
+    Web3
+)
+
+
+def connect():
+    w3 = Web3(IPCProvider(get_default_ipc_path()))
+    if w3.isConnected():
+        return w3
+
+    return False
+
+
+w3 = connect()

web3/providers/ipc.py

@@ -42,22 +42,65 @@ def get_default_ipc_path(testnet=False):
         testnet = ""
 
     if sys.platform == 'darwin':
-        return os.path.expanduser(os.path.join(
+        ipc_path = os.path.expanduser(os.path.join(
             "~",
             "Library",
             "Ethereum",
             testnet,
-            "geth.ipc",
+            "geth.ipc"
         ))
+        if os.path.exists(ipc_path):
+            return ipc_path
+
+        ipc_path = os.path.expanduser(os.path.join(
+            "~",
+            "Library",
+            "Application Support",
+            "io.parity.ethereum",
+            "jsonrpc.ipc"
+        ))
+        if os.path.exists(ipc_path):
+            return ipc_path
+
     elif sys.platform.startswith('linux'):
-        return os.path.expanduser(os.path.join(
+        ipc_path = os.path.expanduser(os.path.join(
             "~",
             ".ethereum",
             testnet,
-            "geth.ipc",
+            "geth.ipc"
+        ))
+        if os.path.exists(ipc_path):
+            return ipc_path
+
+        ipc_path = os.path.expanduser(os.path.join(
+            "~",
+            ".local",
+            "share",
+            "io.parity.ethereum",
+            "jsonrpc.ipc"
         ))
+        if os.path.exists(ipc_path):
+            return ipc_path
+
     elif sys.platform == 'win32':
-        return "\\\\.\\pipe\\geth.ipc"
+        ipc_path = os.path.join(
+            "\\\\",
+            ".",
+            "pipe",
+            "geth.ipc"
+        )
+        if os.path.exists(ipc_path):
+            return ipc_path
+
+        ipc_path = os.path.join(
+            "\\\\",
+            ".",
+            "pipe",
+            "jsonrpc.ipc"
+        )
+        if os.path.exists(ipc_path):
+            return ipc_path
+
     else:
         raise ValueError(
             "Unsupported platform '{0}'.  Only darwin/linux2/win32 are "