В предыдущей статье мы познакомились с Юникодом и способами обработки входных юникодных строк, разным способам обработки и преобразования их в читаемый вид – объекты типа стринг в Питоне. Рассмотрим способы преобразования в другие типы выходных данных и применение различных кодировок к ним. Формулировка задачи Предположим, нам требуется отдать данные в виде символов представленных как целые … Read more
Python Convert Unicode to Bytes Converting Unicode strings to bytes is quite common these days because it is necessary to convert strings to bytes to process files or machine learning. Let’s take a look at how this can be accomplished. Method 1 Built-in function bytes() A string can be converted to bytes using the bytes() … Read more
[toc] ?️ Company Tags: Google, Facebook, Amazon Are you gearing up for your coding interview? If your answer is yes, then here’s a very important and commonly asked interview question for you. Numerous programmers have claimed that they came across this interview question. Hence, there is a high probability that you might come across it … Read more
Python’s bitwise AND operator x & y performs logical AND on each bit position on the binary representations of integers x and y. Thus, each output bit is 1 if both input bits at the same position are 1, otherwise, it’s 0. For example, the integer expression 4 & 3 is translated to binaries 0100 … Read more
Problem Formulation Given a string s, and Given a character c. How many times does character c occur in the string s? Consider the following examples: INPUT s = ‘hello world’ c = ‘l’ OUTPUT 3 INPUT s = ‘aaaa’ c = ‘a’ OUTPUT 4 INPUT s = ‘finxter’ c = ‘z’ OUTPUT 0 Method … Read more
You may have read about the ‘V’s in Big Data: Volume, Velocity, Variety, Veracity, Value, Volatility. Variance is yet another important ‘V’ (it measures Volatility of a data set). In practice, variance is an important measure with important application domains in financial services, weather forecasting, and image processing. Variance measures how much the data spreads … Read more
Short answer: use the expression list(dict.keys()). Problem Formulation Given a dictionary that maps keys to values. Return the keys as a list. For example: Given dictionary {‘Alice’: 18, ‘Bob’, 21, ‘Carl’: 24} Return the keys as a list [‘Alice’, ‘Bob’, ‘Carl’] Solution The dict.keys() method returns a list of all keys in Python 2. The … Read more
Problem Formulation Given two NumPy arrays a and b. How to concatenate both? Method 1: np.concatenate() NumPy’s concatenate() method joins a sequence of arrays along an existing axis. The first couple of comma-separated array arguments are joined. If you use the axis argument, you can specify along which axis the arrays should be joined. For … Read more
A typical online search queries the meaning of data abstraction in Python. When I began learning Python, the answers I found caused more confusion than they solved. Today I will describe data abstraction in a clear way that will assist you in better understanding the concept. We will then apply that concept in code to … Read more
Knowing where you are is important, whether you are in the outdoors, stumbling to the toilet in the middle of the night, or simply programming. Dealing with your midnight confusing or outdoors route-finding skills are a little more complicated, but fortunately, it is pretty easy to figure out your current path in Python. ? Method … Read more
[toc] ?️ Company Tags: As reported by numerous programmers across the globe, this question has been asked in coding interviews/rounds by companies like- Amazon Accolite Adobe Cisco Cognizant Goldman Sachs VMWare So, if you are preparing for your upcoming coding interview, then you might well come across this question in your coding round. Can you … Read more
Python’s not operator returns True if the single operand evaluates to False, and returns False if it evaluates to True. Thus, it logically negates the implicit or explicit Boolean value of the operand. As you read through the article, you can also watch my video for supporting explanations: Python Not Operator on Boolean You can … Read more