python Programming Glossary: predicate

Why is there no first(iterable) built-in function in Python?

http://stackoverflow.com/questions/1077307/why-is-there-no-firstiterable-built-in-function-in-python

i.e. def identity item return item def first iterable predicate identity for item in iterable if predicate item return item.. first iterable predicate identity for item in iterable if predicate item return item raise ValueError 'No satisfactory value found'..

Python: Get list of all classes within current module

http://stackoverflow.com/questions/1796180/python-get-list-of-all-classes-within-current-module

Elegant way to remove items from sequence in Python?

http://stackoverflow.com/questions/18418/elegant-way-to-remove-items-from-sequence-in-python

5 Smith Note that both cases keep the values for which the predicate function evaluates to True so you have to reverse the logic..

How do you get list of methods in a python class?

http://stackoverflow.com/questions/1911281/how-do-you-get-list-of-methods-in-a-python-class

import inspect inspect.getmembers OptionParser predicate inspect.ismethod '__init__' unbound method OptionParser.__init__..

Python: sort function breaks in the presence of nan

http://stackoverflow.com/questions/4240050/python-sort-function-breaks-in-the-presence-of-nan

being used define a custom comparison function a.k.a. predicate that does define an ordering for NaN such as less than any number.. behavior in context. Otherwise you could use a suitable predicate function via cmp in older python versions or via this and functools.cmp_to_key..

python equivalent of filter() getting two output lists (i.e. partition of a list)

http://stackoverflow.com/questions/4578590/python-equivalent-of-filter-getting-two-output-lists-i-e-partition-of-a-list

import filterfalse tee def partition pred iterable 'Use a predicate to partition entries into false entries and true entries' #..

Multiple domains and subdomains on a single Pyramid instance

http://stackoverflow.com/questions/7607807/multiple-domains-and-subdomains-on-a-single-pyramid-instance

URL dispatch you might want to design some custom route predicates that check the request.host value for whatever you'd like... value for whatever you'd like. Returning False from that predicate will prevent that route from ever matching a request to that.. 'sub' config.add_route 'sub_only' ' ' custom_predicates req_sub pregenerator pregen config.add_route 'foo' ' foo'..

Python: find first element in a sequence that matches a predicate

http://stackoverflow.com/questions/8534256/python-find-first-element-in-a-sequence-that-matches-a-predicate

find first element in a sequence that matches a predicate Stupid question ahead I want an idiomatic way to find the first.. way to find the first element in a list that matches a predicate. The current code is quite ugly x for x in seq if predicate.. The current code is quite ugly x for x in seq if predicate x 0 I've thought about changing it to from itertools import..

sandboxing/running python code line by line

http://stackoverflow.com/questions/9670931/sandboxing-running-python-code-line-by-line

associated context data locals globals so I can verify predicates for instance. I'd like to do something like Bret Victor's binarySearch.. interactive environment aiming for crude model checking or predicate assertion for instance. python dynamic programming languages..