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You can use the cmath module in order to solve Quadratic Equation using Python. This is because roots of quadratic equations might be complex in nature. If you have a quadratic equation of the form ax^2 + bx + c = 0, then,Exampleimport cmatha = 12 b = 8 c = 1 # Discriminent d = (b**2) - (4*a*c) root1 = (-b - cmath.sqrt(d)) / (2 * a) root2 = (-b + cmath.sqrt(d)) / (2 * a) print(root1) print(root2)OutputThis will give the output(-0.5+0j) (-0.16666666666666666+0j)
In this article we are going to discuss the set::crbegin() and set::crend() functions in C++ STL, their syntax, working and their return values.What is Set in C++ STL?Sets in C++ STL are the containers which must have unique elements in a general order. Sets must have unique elements because the value of the element identifies the element. Once added a value in set container later can’t be modified, although we can still remove or add the values to the set. Sets are used as binary search trees.What is set::crbegin()?crbegin() function is an inbuilt function in C++ STL, which is defined ... Read More
You can generate these just random 128-bit strings using the random module's getrandbits function that accepts a number of bits as an argument. exampleimport random hash = random.getrandbits(128) print(hex(hash))OutputThis will give the output −0xa3fa6d97f4807e145b37451fc344e58c
In this article we are going to discuss the set::insert() function in C++ STL, their syntax, working and their return values.What is Set in C++ STL?Sets in C++ STL are the containers which must have unique elements in a general order. Sets must have unique elements because the value of the element identifies the element. Once added a value in set container later can’t be modified, although we can still remove or add the values to the set. Sets are used as binary search trees.What is set::insert()?insert() function is an inbuilt function in C++ STL, which is defined in ... Read More
You can use the itertools package's permutations method to find all permutations of a list in Python. You can use it as follows −Exampleimport itertools perms = list(itertools.permutations([1, 2, 3])) print(perms)OutputThis will give the output −[(1, 2, 3), (1, 3, 2), (2, 1, 3), (2, 3, 1), (3, 1, 2), (3, 2, 1)]
It is very easy to do date and time maths in Python using time delta objects. Whenever you want to add or subtract to a date/time, use a DateTime.datetime(), then add or subtract date time.time delta() instances. A time delta object represents a duration, the difference between two dates or times. The time delta constructor has the following function signatureDateTime.timedelta([days[, seconds[, microseconds[, milliseconds[, minutes[, hours[, weeks]]]]]]])¶Note: All arguments are optional and default to 0. Arguments may be ints, longs, or floats, and may be positive or negative. You can read more about it here https://docs.python.org/2/library/datetime.html#timedelta-objectsExampleAn example of using the time ... Read More
The json module in python allows you to dump a dict to json format directly. To use it,Exampleimport json my_dict = { 'foo': 42, 'bar': { 'baz': "Hello", 'poo': 124.2 } } my_json = json.dumps(my_dict) print(my_json)OutputThis will give the output −'{"foo": 42, "bar": {"baz": "Hello", "poo": 124.2}}'You can also pass indent argument to prettyprint the json. exampleimport json my_dict = { 'foo': 42, 'bar': { 'baz': "Hello", 'poo': 124.2 } } my_json = json.dumps(my_dict, indent=2) print(my_json)OutputThis will give the output −{ "foo": 42, "bar": { "baz": "Hello", "poo": 124.2 } }
In this article we are going to discuss the set::get_allocator() function in C++ STL, their syntax, working and their return values.What is Set in C++ STL?Sets in C++ STL are the containers which must have unique elements in a general order. Sets must have unique elements because the value of the element identifies the element. Once added a value in set container later can’t be modified, although we can still remove or add the values to the set. Sets are used as binary search trees.What is set:: get_allocator()?get_allocator() function is an inbuilt function in C++ STL, which is defined in ... Read More
To generate XML from a python dictionary, you need to install the dicttoxml package. You can install it using −$ pip install dicttoxmlOnce installed, you can use the dicttoxml method to create the xml. examplea = { 'foo': 45, 'bar': { 'baz': "Hello" } } xml = dicttoxml.dicttoxml(a) print(xml)OutputThis will give the output −b'45Hello'You can also prettyprint this output using the toprettyxml method. examplefrom xml.dom.minidom import parseString a = { 'foo': 45, 'bar': { 'baz': "Hello" } } xml = dicttoxml.dicttoxml(a) dom = parseString(xml) print(dom.toprettyxml())OutputThis will give the output − 45 Hello
A random 24 bit hash is just random 24 bits. You can generate these just using the random module. exampleimport random hash = random.getrandbits(24) print(hex(hash))OutputThis will give the output0x94fbee