Wtf, python evaluates default arguments at the moment of their definition O_o

src/commands/record.py

@@ -8,16 +8,15 @@ from confirmator import Confirmator
 class RecordCommand(object):
 
     def __init__(self, api_url, user_token, cmd, title, skip_confirmation,
-                 recorder=Recorder(), uploader=Uploader(),
-                 confirmator=Confirmator()):
+                 recorder=None, uploader=None, confirmator=None):
         self.api_url = api_url
         self.user_token = user_token
         self.cmd = cmd
         self.title = title
         self.skip_confirmation = skip_confirmation
-        self.recorder = recorder
-        self.uploader = uploader
-        self.confirmator = confirmator
+        self.recorder = recorder if recorder is not None else Recorder()
+        self.uploader = uploader if uploader is not None else Uploader()
+        self.confirmator = confirmator if confirmator is not None else Confirmator()
 
     def execute(self):
         asciicast = self._record_asciicast()

src/config.py

@@ -8,9 +8,9 @@ DEFAULT_API_URL = 'http://asciinema.org'
 
 class Config:
 
-    def __init__(self, path=DEFAULT_CONFIG_FILE_PATH, overrides=os.environ):
+    def __init__(self, path=DEFAULT_CONFIG_FILE_PATH, overrides=None):
         self.path = os.path.expanduser(path)
-        self.overrides = overrides
+        self.overrides = overrides if overrides is not None else os.environ
 
         self._parse_config_file()
 

src/pty_recorder.py

@@ -14,8 +14,9 @@ from stdout import Stdout
 
 class PtyRecorder(object):
 
-    def record_command(self, command, output=Stdout()):
+    def record_command(self, command, output=None):
         command = shlex.split(command)
+        output = output if output is not None else Stdout()
         master_fd = None
 
         def _set_pty_size():

src/recorder.py

@@ -7,9 +7,9 @@ from pty_recorder import PtyRecorder
 
 class Recorder(object):
 
-    def __init__(self, pty_recorder=PtyRecorder(), env=os.environ):
-        self.pty_recorder = pty_recorder
-        self.env = env
+    def __init__(self, pty_recorder=None, env=None):
+        self.pty_recorder = pty_recorder if pty_recorder is not None else PtyRecorder()
+        self.env = env if env is not None else os.environ
 
     def record(self, cmd, title):
         duration, stdout = timer.timeit(self.pty_recorder.record_command,

src/stdout.py

@@ -17,9 +17,9 @@ class StdoutTiming(object):
 
 class Stdout(object):
 
-    def __init__(self, timing=StdoutTiming()):
+    def __init__(self, timing=None):
         self._data = StringIO.StringIO()
-        self._timing = timing
+        self._timing = timing if timing is not None else StdoutTiming()
 
         self._start_timing()
 

src/uploader.py

@@ -13,8 +13,8 @@ class File(object):
 
 class Uploader(object):
 
-    def __init__(self, http_adapter=UrllibHttpAdapter()):
-        self.http_adapter = http_adapter
+    def __init__(self, http_adapter=None):
+        self.http_adapter = http_adapter if http_adapter is not None else UrllibHttpAdapter()
 
     def upload(self, api_url, user_token, asciicast):
         url = '%s/api/asciicasts' % api_url