Improve program documentation

diff --git a/youtube-dl b/youtube-dl
index 1e6b876e162302342337aa3c758a12111654d9db..46d45d37d95630d5fd742ee16d182530a3dcb34f 100755 (executable)
--- a/youtube-dl
+++ b/youtube-dl
@@ -67,6 +67,7 @@ class FileDownloader(object):
        _ies = []
 
        def __init__(self, params):
+               """Create a FileDownloader object with the given options."""
                self._ies = []
                self.set_params(params)
        
@@ -305,7 +306,7 @@ class InfoExtractor(object):
                return True
 
        def initialize(self):
-               """Initializes an instance (login, etc)."""
+               """Initializes an instance (authentication, etc)."""
                if not self._ready:
                        self._real_initialize()
                        self._ready = True
@@ -320,10 +321,12 @@ class InfoExtractor(object):
                self._downloader = downloader
        
        def to_stdout(self, message):
+               """Print message to stdout if downloader is not in quiet mode."""
                if self._downloader is None or not self._downloader.get_params().get('quiet', False):
                        print message
        
        def to_stderr(self, message):
+               """Print message to stderr."""
                sys.stderr.write('%s\n' % message)
 
        def _real_initialize(self):