Patch #553277: Accept callbacks that are callable, not callbacks that are true.
diff --git a/Lib/ftplib.py b/Lib/ftplib.py
index aaf12fe..ebc88df 100644
--- a/Lib/ftplib.py
+++ b/Lib/ftplib.py
@@ -392,7 +392,7 @@
The callback function (2nd argument) is called for each line,
with trailing CRLF stripped. This creates a new port for you.
print_line() is the default callback.'''
- if not callback: callback = print_line
+ if not callable(callback): callback = print_line
resp = self.sendcmd('TYPE A')
conn = self.transfercmd(cmd)
fp = conn.makefile('rb')
diff --git a/Misc/ACKS b/Misc/ACKS
index b413540..1897e30 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -226,6 +226,7 @@
Ben Jackson
Paul Jackson
David Jacobs
+Geert Jansen
Jack Jansen
Bill Janssen
Drew Jenkins