frozenset

I have a list of tuples, each tuple of which contains one string and two integers. The list looks like this: x = [('a',1,2), ('b',3,4), ('x',5,6), ('a',2,1)] The list contains thousands of such tuples. Now if I want to get unique combinations, I can do the frozenset on my list as follows: y = set(map(frozenset, x)) This gives me the following result: {frozenset({'a', 2, 1}), frozenset({'x', 5, 6}), frozenset({3, 'b', 4})} I know that set is an unordered data structure and this is normal case but I want to preserve the order of the elements here so that I can thereafter insert the elements in a

consider the following script: # multipleSmallFrozensets is a list of 7 frozensets of differenet number of string objects multipleSmallFrozensets = [ frozenset({'YHR007C', 'YHR042W'}), frozenset({'YPL274W'}), frozenset({'YCL064C'}), frozenset({'YBR166C'}), frozenset({'YEL041W', 'YJR049C'}), frozenset({'YGL142C'}), frozenset({'YJL134W', 'YKR053C'})] # singleFrozenset is a frozenset of 3410 string objects singleFrozenset = frozenset({'YIL140W','YLR268W','YLR357W','YJL155C','YHR067W', 'YAL008W','YBR255W','YFR027W','YGR148C','YJR122W','YJL204C','YJL093C','YLR244C', 'YNL003C','YBR111W-A', ...}) #

I have this error on each my command with Python: ➜ /tmp sudo easy_install pip Traceback (most recent call last): File "/usr/bin/easy_install-2.7", line 11, in load_entry_point('setuptools==1.1.6', 'console_scripts', 'easy_install')() File "/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/pkg_resources.py", line 357, in load_entry_point return get_distribution(dist).load_entry_point(group, name) File "/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/pkg_resources.py", line 2394, in load_entry_point return ep.load() File "/System/Library

I was tinkering around with Python's set and frozenset collection types. Initially, I assumed that frozenset would provide a better lookup performance than set , as its immutable and thus could exploit the structure of the stored items. However, this does not seem to be the case, regarding the following experiment: import random import time import sys def main(n): numbers = [] for _ in xrange(n): numbers.append(random.randint(0, sys.maxint)) set_ = set(numbers) frozenset_ = frozenset(set_) start = time.time() for number in numbers: number in set_ set_duration = time.time() - start start = time

When I attempt to import hashlib in any context, it throws this error: File "<stdin>", line 1, in <module> File "build/bdist.macosx-10.11-intel/egg/hashlib.py", line 115, in <module> """ TypeError: 'frozenset' object is not callable Any idea how I can resolve this? I'm generating this error simply by opening up Terminal, running python and then typing import hashlib . I had the same problem yesterday, Hashlib wasn't installed and trying to install it using pip would give that error. I fixed it by installing it using easy_install instead. Also I had to install Scipy and Microsoft Visual C++