Add debug attribute and conditionals at init from Browser

Author: neyberson

devtools/browser.py

@@ -7,21 +7,30 @@
 
 
 class Browser:
-    def __init__(self, path=None):
+    def __init__(self, debug=None, path=None):
         self.pipes = Pipe()
 
+        if not debug: # false o None
+            stderr=subprocess.DEVNULL
+        elif debug is True:
+            stderr=None
+        else:
+            stderr=debug
+            
         if not path:
             if platform.system() == "Windows":
                 path = r"C:\Program Files\Google\Chrome\Application\chrome.exe"
             elif platform.system() == "Linux":
                 path = "/usr/bin/google-chrome-stable"
             else:
                 raise ValueError("You must set path to a chrome-like browser")
+            
         new_env = os.environ.copy()
         new_env["CHROMIUM_PATH"] = path
         win_only = {}
         if platform.system() == "Windows":
             win_only = {"creationflags": subprocess.CREATE_NEW_PROCESS_GROUP}
+            
         proc = subprocess.Popen(
             [
                 sys.executable,
@@ -32,7 +41,7 @@ def __init__(self, path=None):
             close_fds=True,
             stdin=self.pipe.read_to_chromium,
             stdout=self.pipe.write_from_chromium,
-            stderr=None,
+            stderr=stderr,
             env=new_env,
             **win_only,
         )