From 29bbe507b073676e4e8f638c7a767f90a5fdd42c Mon Sep 17 00:00:00 2001
From: mooomooo <mooomooo>
Date: Sat, 12 Sep 2020 23:01:57 -0700
Subject: [PATCH 1/2] fixed DeprecationWarning: invalid escape sequence

---
 silhouette/Graphtec.py | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/silhouette/Graphtec.py b/silhouette/Graphtec.py
index febbd167..f37d3f96 100644
--- a/silhouette/Graphtec.py
+++ b/silhouette/Graphtec.py
@@ -395,7 +395,7 @@ def __init__(self, log=sys.stderr):
       print("Searching for bt devices on OSX", file=log)
       # on osx a rfcomm port is created and linked automatically when the cameo is connected
       # TODO add support for other machines. I would expect files like CAMEO3-... and PORTRAIT2-...
-      pat = re.compile("tty\.(PORTRAIT2|CAMEO3|CAMEO4)-.*")
+      pat = re.compile("tty.(PORTRAIT2|CAMEO3|CAMEO4)-.*")
       # get first matching port
       rfcomms = [f for f in os.listdir("/dev/") if pat.match(f)]
       rfcomm = rfcomms[0] if rfcomms else None
@@ -414,7 +414,7 @@ def __init__(self, log=sys.stderr):
     else:   # linux
       print("Searching for bt devices on Linux", file=log)
 
-      pat = re.compile("tty\.(PORTRAIT2|CAMEO3|CAMEO4)-?.*")
+      pat = re.compile("tty.(PORTRAIT2|CAMEO3|CAMEO4)-?.*")
       # get first matching port
       rfcomms = [f for f in os.listdir("/dev/") if pat.match(f)]
       rfcomm = rfcomms[0] if rfcomms else None
@@ -1125,7 +1125,7 @@ def draw_mm_cmd(self, mmy, mmx):
     return "D%d,%d" % (_mm_2_SU(mmy), _mm_2_SU(mmx))
 
   def upper_left_mm_cmd(self, mmy, mmx):
-    """ \y,x """
+    r""" \y,x """
     return "\\%d,%d" % (_mm_2_SU(mmy), _mm_2_SU(mmx))
 
   def lower_right_mm_cmd(self, mmy, mmx):

From b842ced3fd3fd1c32d94de9ebb013ce45a8e78a3 Mon Sep 17 00:00:00 2001
From: mooomooo <mooomooo>
Date: Sun, 13 Sep 2020 11:13:17 -0700
Subject: [PATCH 2/2] Sometimes cmd_list is an empty list?

---
 silhouette/Graphtec.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/silhouette/Graphtec.py b/silhouette/Graphtec.py
index f37d3f96..c0405b3a 100644
--- a/silhouette/Graphtec.py
+++ b/silhouette/Graphtec.py
@@ -1398,7 +1398,8 @@ def plot(self, mediawidth=210.0, mediaheight=297.0, margintop=None,
         self.draw_mm_cmd(bbox['ury'], bbox['llx'])]
 
     # potentially long command string needs extra care
-    self.safe_send_command(cmd_list)
+    if cmd_list:
+        self.safe_send_command(cmd_list)
 
     self.wait_for_ready()