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Python: the built-in int (3.x) / long (2.x) integer type is of arbitrary precision. The Decimal class in the standard library module decimal has user definable precision and limited mathematical operations (exponentiation, square root, etc. but no trigonometric functions). The Fraction class in the module fractions implements rational numbers ...
Here, the list [0..] represents , x^2>3 represents the predicate, and 2*x represents the output expression.. List comprehensions give results in a defined order (unlike the members of sets); and list comprehensions may generate the members of a list in order, rather than produce the entirety of the list thus allowing, for example, the previous Haskell definition of the members of an infinite list.
The dictionary problem is the classic problem of designing efficient data structures that implement associative arrays. [2] The two major solutions to the dictionary problem are hash tables and search trees.
Python sets are very much like mathematical sets, and support operations like set intersection and union. Python also features a frozenset class for immutable sets, see Collection types. Dictionaries (class dict) are mutable mappings tying keys and corresponding values. Python has special syntax to create dictionaries ({key: value})
The people in Donald Trump’s orbit are floating some dramatic ideas that would remake the way US banks are regulated, from deleting the CFPB to abolishing the FDIC.. There are lots of questions ...
Pandas' syntax for mapping index values to relevant data is the same syntax Python uses to map dictionary keys to values. For example, if s is a Series, s['a'] will return the data point at index a. Unlike dictionary keys, index values are not guaranteed to be unique.
From January 2008 to May 2009, if you bought shares in companies when John L. Clendenin joined the board, and sold them when he left, you would have a -3.9 percent return on your investment, compared to a -38.2 percent return from the S&P 500.
From January 2008 to December 2008, if you bought shares in companies when Eric Shinseki joined the board, and sold them when he left, you would have a -46.6 percent return on your investment, compared to a -38.5 percent return from the S&P 500.