exit() is so pedestrian

C:\Users\kurose\workspace>python
Python 2.7.5 (default, May 15 2013, 22:43:36) [MSC v.1500 32 bit (Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>>
>>> raise SystemExit("bye")
bye

C:\Users\kurose\workspace>

gEvent friendly REPL

I was surprised how little code this was.  The fileobject module added in gEvent 1.0 and the standard library code module make this trivial.

import sys
import code
from gevent import fileobject

_green_stdin = fileobject.FileObject(sys.stdin)
_green_stdout = fileobject.FileObject(sys.stdout)

def _green_raw_input(prompt):
    _green_stdout.write(prompt)
    return _green_stdin.readline()[:-1]

def run_console(local=None, prompt=">>>"):
    code.interact(prompt, _green_raw_input, local=local or {})

if __name__ == "__main__":
    run_console()

missing the __line__ macro from C?

Frame objects to the rescue!

import sys

def __line__():
    f = sys._getframe().f_back
    return f.f_lineno + f.f_code.co_firstlineno

sigfigs

def _sigfigs(n, sigfigs=3):
    'helper function to round a number to significant figures'
    if n == 0 or math.isnan(n):  # avoid math domain errors
        return n
    return round(float(n), -int(math.floor(math.log10(abs(n))) - sigfigs + 1))

Attribution

>>> class Attribution(object):
...    def __init__(self):
...       self.instance = "instance"
...    type = "type"
...    def __getattr__(self, key):
...       return "__getattr__"
...
>>> a = Attribution()
>>> a.instance
'instance'
>>> a.type
'type'
>>> a.b
'__getattr__'

time THIS

>>> timeit.timeit("s.recv(1, socket.MSG_PEEK", '''
... import socket
... s = socket.create_connection( ("google.com", 80) )
... s.send("blah blah\\n\\r\\n\\r\\n\\r\\n\\r\\n\\rblahblah blah"
... ''')
Traceback (most recent call last):
  File "<stdin>", line 5, in <module>
  File "C:\Python27\lib\timeit.py", line 230, in timeit
    return Timer(stmt, setup, timer).timeit(number)
  File "C:\Python27\lib\timeit.py", line 136, in __init__
    code = compile(src, dummy_src_name, "exec")
  File "<timeit-src>", line 11
    _t1 = _timer()

SyntaxError: invalid syntax