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...pow(x=5, y=3) Traceback (most recent call last): File "<stdin>", line 1, in <module> TypeError: pow() takes no keyword arguments In addition, there are some functions with particularly interesting semantics: range(), which accepts an optional parameter to the left of its required parameter. [2] dict(), whose mapping/iterator parameter is optional and semantically must be positional-only. Any externally visible name for this parameter would occlude that name going into the **kwar...
...pow() no longer allows a third non-None argument if either of the first two arguments is a float, or if both are of integer types and the second argument is negative (in which latter case the arguments are converted to float, so this is really the same restriction). <p><li>An old tokenizer bug allowed floating point literals with an incomplete exponent, such as 1e and 3.1e-. Such literals now raise SyntaxError. <p><li>Nested scopes are standard in 2.2 (they were enabled ...
...Power operator. Python's use of a**b as pow(a,b) has two perceived disadvantages: Most mathematicians are more familiar with a^b for this purpose. It results in long augmented assignment operator ~**=. However, this issue is distinct from the main issue here. Additional multiplication operators. Several forms of multiplications are used in (multi-)linear algebra. Most can be seen as variations of multiplication in linear algebra sense (such as Kronecker product). But two forms appear to b...
...powerful primitives to construct multi-threaded and multi-process applications but parallelizing simple operations requires a lot of work i.e. explicitly launching processes/threads, constructing a work/results queue, and waiting for completion or some other termination condition (e.g. failure, timeout). It is also difficult to design an application with a global process/thread limit when each component invents its own parallel execution strategy. Specification Naming The proposed package w...
...pow() no longer lets the platform C pow() raise -1.0 to integer powers, because (at least) glibc gets it wrong in some cases. The result should be -1.0 if the power is odd and 1.0 if the power is even, and any float with a sufficiently large exponent is (mathematically) an exact even integer. SF bug 759227: A new-style class that implements __nonzero__() must return a bool or int (but not an int subclass) from that method. This matches the restriction on classic classes. The encoding attribute...