Comments on: I want your awesome python snippets.

By: Jon

Jon — Wed, 06 Jan 2010 08:57:07 +0000

This will be ridiculous to most people, but I've been programming professionally in Python for a year and a half and only figured this out today...

instead of (when overriding a method to add kwargs...)

def foo(self, **kwargs):
if "foobar" in kwargs:
self.foobar = kwargs["foobar"]
del(kwargs["foobar"])
else:
self.foobar = None
super(Foo, self).foo(**kwargs)

do

def foo(self, **kwargs):
self.foobar = kwargs.pop("foobar", None)
super(Foo, self).foo(**kwargs)

By: Jon

Jon — Wed, 06 Jan 2010 02:57:07 +0000

By: Joso S. O. Bueno

Joso S. O. Bueno — Mon, 04 Jan 2010 12:08:07 +0000

# a bit washed out, but should fulfill the "acessible" part while retaining some wonder
# with the zip and enumerate calls.

# (I have some oneliner obfuscated versions of this, but I don't think those are the goal :-) )

def romans_to_numerals(roman_str):
__ roman_digits = "IVXLCDM"
__ numeric_values = (1, 5, 10, 50, 100, 500, 1000)
__ values = dict(zip(roman_digits, numeric_values))
__ final_value = 0
__ for i, digit in enumerate(roman_str):
____ final_value += values[digit]
____ if i > 0 and roman_digits.index(roman_str[i - 1]) < roman_digits.index(digit):
______ final_value -= 2 * values[roman_str[i - 1]]
__ return final_value

By: Siddharth Mitra

Siddharth Mitra — Sun, 03 Jan 2010 21:48:59 +0000

Neat python tricks - http://bit.ly/79CND9 on reddit and on Stackoverflow - http://bit.ly/6qmAum

By: Roger Pate

Roger Pate — Sat, 02 Jan 2010 22:32:04 +0000

While there’s some controversy around Community Wiki questions on Stack Overflow (I notice you have an account), this seems to be exactly appropriate. One suggestion: state a time limit in the question after which you’ll close it, otherwise it will accumulate duplicates and other cruft.

By: Roger Pate

Roger Pate — Sat, 02 Jan 2010 06:20:31 +0000

__all__ = []
def export(obj):
__all__.append(obj.__name__)
return obj

@export
class Example: pass

@export
def example(): pass

By: pkarl

pkarl — Wed, 30 Dec 2009 22:58:47 +0000

http://snipt.net/pkarl/return-a-string-starting…

By: chin

chin — Mon, 28 Dec 2009 10:25:41 +0000

Recursive generation of binary digits

def iinc(n):
if n <= 0: return [0]
res = iinc(n-1)
stack = res[:]
while stack:
k = stack.pop()
if k: res[len(stack)] = 0
else: res[len(stack)] = 1; return res
return [1] + res

By: Kenneth Reitz

Kenneth Reitz — Mon, 21 Dec 2009 18:40:51 +0000

http://github.com/kennethreitz/kenlib

By: Mario

Mario — Sun, 20 Dec 2009 07:31:57 +0000

Take a look at my blog (pysnippet.com). I have some posts about file-like objects, unit-testing, and language features such as the with-statement and for/while/try-else.