Do no use bytes.hex parameter, get back Python 3.7 support

The bytes.hex parameters are only available from Python 3.8. As this is
only used for debug messages, stop using it, which allows support for
Python 3.7.

Author: schodet

nxt/backend/bluetooth.py

@@ -66,7 +66,7 @@ def send(self, data):
         :param bytes data: Data to send.
         """
         data = struct.pack("<H", len(data)) + data
-        logger.debug("send: %s", data.hex(":"))
+        logger.debug("send: %s", data.hex())
         self._sock.send(data)
 
     def recv(self):
@@ -76,10 +76,10 @@ def recv(self):
         :rtype: bytes
         """
         data = self._sock.recv(2)
-        logger.debug("recv: %s", data.hex(":"))
+        logger.debug("recv: %s", data.hex())
         (plen,) = struct.unpack("<H", data)
         data = self._sock.recv(plen)
-        logger.debug("recv: %s", data.hex(":"))
+        logger.debug("recv: %s", data.hex())
         return data
 
 

nxt/backend/devfile.py

@@ -62,7 +62,7 @@ def send(self, data):
         :param bytes data: Data to send.
         """
         data = struct.pack("<H", len(data)) + data
-        logger.debug("send: %s", data.hex(":"))
+        logger.debug("send: %s", data.hex())
         self._device.write(data)
 
     def recv(self):
@@ -72,10 +72,10 @@ def recv(self):
         :rtype: bytes
         """
         data = self._device.read(2)
-        logger.debug("recv: %s", data.hex(":"))
+        logger.debug("recv: %s", data.hex())
         (plen,) = struct.unpack("<H", data)
         data = self._device.read(plen)
-        logger.debug("recv: %s", data.hex(":"))
+        logger.debug("recv: %s", data.hex())
         return data
 
 

nxt/backend/socket.py

@@ -64,7 +64,7 @@ def send(self, data):
 
         :param bytes data: Data to send.
         """
-        logger.debug("send: %s", data.hex(":"))
+        logger.debug("send: %s", data.hex())
         self._sock.send(data)
 
     def recv(self):
@@ -74,7 +74,7 @@ def recv(self):
         :rtype: bytes
         """
         data = self._sock.recv(1024)
-        logger.debug("recv: %s", data.hex(":"))
+        logger.debug("recv: %s", data.hex())
         return data
 
 

nxt/backend/usb.py

@@ -71,7 +71,7 @@ def send(self, data):
 
         :param bytes data: Data to send.
         """
-        logger.debug("send: %s", data.hex(":"))
+        logger.debug("send: %s", data.hex())
         self._epout.write(data)
 
     def recv(self):
@@ -81,7 +81,7 @@ def recv(self):
         :rtype: bytes
         """
         data = self._epin.read(64).tobytes()
-        logger.debug("recv: %s", data.hex(":"))
+        logger.debug("recv: %s", data.hex())
         return data
 
 

setup.cfg

@@ -10,6 +10,7 @@ url = https://github.com/schodet/nxt-python/
 classifiers =
 	Programming Language :: Python :: 3
 	Programming Language :: Python :: 3 :: Only
+	Programming Language :: Python :: 3.7
 	Programming Language :: Python :: 3.8
 	Programming Language :: Python :: 3.9
 	Programming Language :: Python :: 3.10
@@ -28,7 +29,7 @@ scripts =
 	scripts/nxt_push
 	scripts/nxt_server
 	scripts/nxt_test
-python_requires = >=3.8
+python_requires = >=3.7
 install_requires =
 	pyusb >= 1.2.1