¡@
python Programming Glossary: truthhttp://stackoverflow.com/questions/10062954/valueerror-the-truth-value-of-an-array-with-more-than-one-element-is-ambiguous The truth value of an array with more than one element is ambiguous. Use.. I got the rather cryptic error message ValueError The truth value of an array with more than one element is ambiguous. Use..
Why does “[] == False” evaluate to False when “if not []” succeeds? http://stackoverflow.com/questions/10440792/why-does-false-evaluate-to-false-when-if-not-succeeds says no etc. So this leads me to identify with False truth values however if I try to compare and False directly I obtain..
Boolean value of objects in Python http://stackoverflow.com/questions/1087135/boolean-value-of-objects-in-python have a class foo with attribute bar . How can I define its truth value so that say it will be evaluated to True if bar 2 0 and..
Evaluation of boolean expressions in Python http://stackoverflow.com/questions/1452489/evaluation-of-boolean-expressions-in-python of boolean expressions in Python What truth value do objects evaluate to in Python Related Questions Boolean.. share improve this question Any object can be tested for truth value for use in an if or while condition or as operand of the.. one of their operands. http www.python.org doc 2.5.2 lib truth.html And as mentioned you can override with custom objects by..
How can I handle exceptions in a list comprehension in Python? http://stackoverflow.com/questions/1528237/how-can-i-handle-exceptions-in-a-list-comprehension-in-python list comprehension are all expressing part of all of this truth 1 literally i.e. lexically IN the comprehension itself you can't..
What does `<>` mean in Python? http://stackoverflow.com/questions/16749121/what-does-mean-in-python
http://stackoverflow.com/questions/1746613/bitwise-operation-and-usage is 0 otherwise it's 0. These can often be best shown as truth tables. Input possibilities are on the top and left the resultant..
Why does `a == b or c or d` always evaluate to True? [duplicate] http://stackoverflow.com/questions/20002503/why-does-a-b-or-c-or-d-always-evaluate-to-true The or operator chooses the first argument with a positive truth value if Jon And since Jon has a positive truth value the if.. a positive truth value if Jon And since Jon has a positive truth value the if block executes. That is what causes Access granted..
Is False == 0 and True == 1 in Python an implementation detail or is it guaranteed by the language? http://stackoverflow.com/questions/2764017/is-false-0-and-true-1-in-python-an-implementation-detail-or-is-it-guarante and in the boolean subsection Booleans These represent the truth values False and True ... Boolean values behave like the values..
Reason for “all” and “any” result on empty lists http://stackoverflow.com/questions/3275058/reason-for-all-and-any-result-on-empty-lists more difficult. See the Wikipedia article on vacuous truth . Another analogy If there are no people in a room then everyone..
Prepend a line to an existing file in Python http://stackoverflow.com/questions/4454298/prepend-a-line-to-an-existing-file-in-python common operations but the goal is not to hide fundamental truths. The fundamental truth you are encountering here is that you.. goal is not to hide fundamental truths. The fundamental truth you are encountering here is that you generally can't prepend..
http://stackoverflow.com/questions/5488307/numpy-array-in-python-list 1 in np.array 1 1 np.array 2 2 is an error ValueError The truth value of an array with more than one element is ambiguous. Use..
Explaining the python 'self' variable to a beginner http://stackoverflow.com/questions/6990099/explaining-the-python-self-variable-to-a-beginner for you first. classes are objects is very far from the truth. Lets look at this block of code class Bank # let's create a..
Why is bool a subclass of int? http://stackoverflow.com/questions/8169001/why-is-bool-a-subclass-of-int bool type 0 and 1 were the official representation for truth value similar to C89. To avoid unnecessarily breaking non ideal.. needed to work just like 0 and 1. This goes beyond merely truth value but all integral operations. No one would recommend using.. would most people recommend testing equality to determine truth value no one wanted to find out the hard way just how much existing..
|