Article Categories
- All Categories
-
Data Structure
-
Networking
-
RDBMS
-
Operating System
-
Java
-
MS Excel
-
iOS
-
HTML
-
CSS
-
Android
-
Python
-
C Programming
-
C++
-
C#
-
MongoDB
-
MySQL
-
Javascript
-
PHP
Python Articles
Page 806 of 852
How to generate a 24bit hash using Python?
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
Read MoreHow to generate prime twins using Python?
Twin primes are pairs of primes which differ by two. The first twin primes are {3,5}, {5,7}, {11,13} and {17,19}. You can generate prime twins in python by running a for loop and checking for primality of the numbers as you do so. exampledef is_prime(n): for i in range(2, n): if n % i == 0: return False return True def generate_twins(start, end): for i in range(start, end): j = i + 2 if(is_prime(i) and is_prime(j)): print("{:d} and {:d}".format(i, j)) generate_twins(2, 100)OutputThis will give the output −3 and 5 5 and 7 11 and 13 17 and 19 29 and 31 41 and 43 59 and 61 71 and 73
Read MoreWhat are the best practices for using loops in Python?
This is a language agnostic question. Loops are there in almost every language and the same principles apply everywhere. You need to realize that compilers do most heavy lifting when it comes to loop optimization, but you as a programmer also need to keep your loops optimized.It is important to realize that everything you put in a loop gets executed for every loop iteration. The key to optimizing loops is to minimize what they do. Even operations that appear to be very fast will take a long time if the repeated many times. Executing an operation that takes 1 microsecond ...
Read MoreWhat is the basic syntax to access Python Dictionary Elements?
You can access a dictionary value to a variable in Python using the access operator []. examplemy_dict = { 'foo': 42,'bar': 12.5 } new_var = my_dict['foo'] print(new_var)OutputThis will give the output −42You can also access the value using the get method on the dictionary. examplemy_dict = { 'foo': 42,'bar': 12.5 } new_var = my_dict.get('foo') print(new_var)OutputThis will give the output −42
Read MoreHow to make loops run faster using Python?
This is a language agnostic question. Loops are there in almost every language and the same principles apply everywhere. You need to realize that compilers do most heavy lifting when it comes to loop optimization, but you as a programmer also need to keep your loops optimized.It is important to realize that everything you put in a loop gets executed for every loop iteration. They key to optimizing loops is to minimize what they do. Even operations that appear to be very fast will take a long time if the repeated many times. Executing an operation that takes 1 microsecond ...
Read MoreHow to create a lambda inside a Python loop?
You can create a list of lambdas in a python loop using the following syntax −Syntaxdef square(x): return lambda : x*x listOfLambdas = [square(i) for i in [1,2,3,4,5]] for f in listOfLambdas: print f()OutputThis will give the output −1 4 9 16 25You can also achieve this using a functional programming construct called currying. examplelistOfLambdas = [lambda i=i: i*i for i in range(1, 6)] for f in listOfLambdas: print f()OutputThis will give the output −1 4 9 16 25
Read MoreHow can I loop over entries in JSON using Python?
You can parse JSON files using the json module in Python. This module parses the json and puts it in a dict. You can then get the values from this like a normal dict. For example, if you have a json with the following content −{ "id": "file", "value": "File", "popup": { "menuitem": [ {"value": "New", "onclick": "CreateNewDoc()"}, {"value": "Open", "onclick": "OpenDoc()"}, {"value": "Close", "onclick": "CloseDoc()"} ] } }ExampleYou can load it in your python program and loop over its keys ...
Read MoreHow to execute Python multi-line statements in the one-line at command-line?
There are multiple ways in which you can use multiline statements in the command line in python. For example, bash supports multiline statements, which you can use like −Example$ python -c ' > a = True > if a: > print("a is true") > 'OutputThis will give the output −a is trueIf you prefer to have the python statement in a single line, you can use the newline between the commands. example$ python -c $'a = Trueif a: print("a is true");'OutputThis will give the output −a is true
Read MoreHow to loop through multiple lists using Python?
The most straightforward way seems to use an external iterator to keep track. Note that this answer considers that you're looping on same sized lists. examplea = [10, 12, 14, 16, 18] b = [10, 8, 6, 4, 2] for i in range(len(a)): print(a[i] + b[i])OutputThis will give the output −20 20 20 20 20ExampleYou can also use the zip method that stops when the shorter of a or b stops.a = [10, 12, 14, 16, 18] b = [10, 8, 6] for (A, B) in zip(a, b): print(A + B)OutputThis will give the output −20 20 20
Read MoreHow to compare two variables in an if statement using Python?
You can compare 2 variables in an if statement using the == operator. examplea = 10 b = 15 if a == b: print("Equal") else: print("Not equal")OutputThis will give the output −Not EqualYou can also use the is the operator. examplea = "Hello" b = a if a is b: print("Equal") else: print("Not equal")OutputThis will give the output −EqualNote that is will return True if two variables point to the same object, == if the objects referred to by the variables are equal.
Read More