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Fail Fast & Self Healing Using Circuit Breaker

What is Circuit Breaker?

Circuit Breaker is a pattern to monitor the failures and it keeps the count of failure, after reaching the threshold of failure. it stops sending requests to the external server till timeout.

State of the Circuit Breaker

Circuit Breaker has three states:

Closed: It is a normal state. Every request going through the services.

Open: When shit started, If…

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Easily, Delete your tweets from your Twitter account using python

If you want to delete your tweets from your twitter account then it is very easy to do using python.

TL;DR

Please follow these steps to delete your twitter’s tweet status:

Steps:

1: Install tweepy python library either using pip or conda python package manager.

2. Get your Cosumer API key and Consumer API secret key from your twitter app.

3. Get your API access token & API…

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In-Place QuickSort

Challenge Create an in-place version of Quicksort. You need to follow Lomuto Partitioning method.

Guideline Instead of copying the array into multiple sub-arrays, use indices to keep track of the different sub-arrays. You can pass the indices to a modified partition method. The partition method should partition the sub-array and then return the index location where the pivot gets placed, so you…

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Maximum AND

Given two numbers A and B. Find the value of pair (P,Q) such that A <= P < Q <= B value of P AND Q is maximum where AND is a binary operator. Refer to this link for more information about AND operator : http://en.wikipedia.org/wiki/Bitwise_operation#AND

Input: First line of input contains number of test cases T. Each test case contains two numbers A and B.

Output: For each test case print the…

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#Maximum AND

Time Conversion

Problem Statement

Given a time in AM/PM format, convert it to military (24-hour) time.

Note: Midnight is 12:00:00AM on a 12-hour clock and 00:00:00 on a 24-hour clock. Noon is 12:00:00PM on a 12-hour clock and 12:00:00 on a 24-hour clock.

Input Format

A time in 12-hour clock format (i.e.: hh:mm:ssAM or hh:mm:ssPM), where 01≤hh≤12.

Output Format

Convert and print the given time in 24-hour format,…

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#Time Conversion

Diagonal Difference

Problem Statement

Given a square matrix of size N×N, calculate the absolute difference between the sums of its diagonals.

Input Format

The first line contains a single integer, N. The next N lines denote the matrix’s rows, with each line containing N space-separated integers describing the columns.

Output Format

Print the absolute difference between the two sums of the matrix’s diagonals as a…

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#Diagonal Difference

Strange Grid

#codeifyoucansolve A strange grid has been recovered from an old book. It has 5 columns and infinite number of rows. The bottom row is considered as the first row. First few rows of the grid are like this: ………….. ………….. 20 22 24 26 28 11 13 15 17 19 10 12 14 16 18 1 3 5 7 9 0 2 4 6 8 The grid grows upwards forever! Your task is to find the integer in cth column in rth row of the grid. Input…

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#Strange Grid

Possible Path

Adam is standing at point (a,b) in an infinite 2D grid. He wants to know if he can reach point (x,y) or not. The only operation he can do is to move to point (a+b,b), (a,a+b), (a-b,b), or (a,a-b) from some point (a,b). It is given that he can move to any point on this 2D grid,i.e., the points having positive or negative X(or Y) co-ordinates. Tell Adam whether he can reach (x,y) or not. Input…

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#Possible Path

Save Quantumland

Problem Statement

In Quantumland, there are n cities numbered from 1 to n. Here, ci denotes the ith city. There are n−1 roads in Quantumland. Here, ci and ci+1 have a bidirectional road between them for each i<n.

There is a rumor that Flatland is going to attack Quantumland, and the queen wants to keep her land safe. The road between ci and ci+1 is safe if there is a guard in ci or ci+1.

The…

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#Save Quantumland in Python

Emma's Notebook

Emma’s Notebook

Problem Statement Emma is writing bits (1s and 0s) in her notebook. Every second, she writes more bits. In the 1st second, she writes two bits in her notebook. She starts with 0 and alternates between 0 and 1. They look like this: 0 1 In the 2nd second, she writes three more bits in her notebook. This time, she starts with 1 and keeps alternating between 0 and 1. Now, they look like this: 0 1 1 0…

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#Emma&039;s Notebook in Python

Emma's Notebook

Emma’s Notebook

Problem Statement

Emma is writing bits (1s and 0s) in her notebook. Every second, she writes more bits.

In the 1st second, she writes two bits in her notebook. She starts with 0 and alternates between 0 and 1. They look like this:

0 1 In the 2nd second, she writes three more bits in her notebook. This time, she starts with 1 and keeps alternating between 0 and 1. Now, they look like this:

0 1 1 0 1

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#Emma&039;s Notebook in Python

Calendar Module

Problem Statement

Calendar Module

Calendar module allows you to output calendars and provides additional useful functions related to the calendar.

class calendar.TextCalendar([firstweekday])

This class can be used to generate plain text calendars.

Sample Code

>>> import calendar >>> >>> print calendar.TextCalendar(firstweekday=6).formatyear(2015) 2015

January…