From 1d33b3dc0c692c4d0802ca0cc2f89d7a6f7feffb Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Thu, 19 Dec 2019 08:12:00 +0530
Subject: [PATCH] Fix prints()

---
 src/calibre/prints.py | 26 ++++++++++++++++++++------
 1 file changed, 20 insertions(+), 6 deletions(-)

diff --git a/src/calibre/prints.py b/src/calibre/prints.py
index dba67df599..7f0870c546 100644
--- a/src/calibre/prints.py
+++ b/src/calibre/prints.py
@@ -18,14 +18,28 @@ def is_binary(stream):
 def prints(*a, **kw):
     ' Print either unicode or bytes to either binary or text mode streams '
     stream = kw.get('file', sys.stdout)
+    sep, end = kw.get('sep'), kw.get('end')
+    if sep is None:
+        sep = ' '
+    if end is None:
+        end = '\n'
     if is_binary(stream):
         encoding = getattr(stream, 'encoding', None) or 'utf-8'
         a = tuple(as_bytes(x, encoding=encoding) for x in a)
-        kw['sep'] = as_bytes(kw.get('sep', b' '))
-        kw['end'] = as_bytes(kw.get('end', b'\n'))
+        sep = as_bytes(sep)
+        end = as_bytes(end)
     else:
         a = tuple(as_unicode(x, errors='replace') for x in a)
-        kw['sep'] = as_unicode(kw.get('sep', ' '))
-        kw['end'] = as_unicode(kw.get('end', '\n'))
-
-    return print(*a, **kw)
+        sep = as_unicode(sep)
+        end = as_unicode(end)
+    for x in a:
+        stream.write(x)
+        if sep:
+            stream.write(sep)
+    if end:
+        stream.write(end)
+    if kw.get('flush'):
+        try:
+            stream.flush()
+        except Exception:
+            pass