python is infuriating

$ mkdir /tmp/empty
$ cd /tmp/empty
$ ls -la
total 8
drwxrwxr-x  2 john john 4096 jun  9 13:31 .
drwxrwxrwt 11 root root 4096 jun  9 13:31 ..
$ echo 'print "trololo"' > dumb.py
$ python
Python 2.7.5+ (default, Feb 27 2014, 19:37:08) 
[GCC 4.8.1] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import dumb
trololo
>>> 
$ ls -la
total 16
drwxrwxr-x  2 john john 4096 jun  9 13:31 .
drwxrwxrwt 11 root root 4096 jun  9 13:31 ..
-rw-rw-r--  1 john john   16 jun  9 13:31 dumb.py
-rw-rw-r--  1 john john  111 jun  9 13:31 dumb.pyc
$ rm dumb.py
$ ls -la
total 12
drwxrwxr-x  2 john john 4096 jun  9 13:32 .
drwxrwxrwt 11 root root 4096 jun  9 13:32 ..
-rw-rw-r--  1 john john  111 jun  9 13:31 dumb.pyc
$ python
Python 2.7.5+ (default, Feb 27 2014, 19:37:08) 
[GCC 4.8.1] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import dumb
trololo
>>> 
$