What is Type () used for?

type() function is mostly used for debugging purposes. Two different types of arguments can be passed to type() function, single and three argument. If single argument type(obj) is passed, it returns the type of given object. If three arguments type(name, bases, dict) is passed, it returns a new type object.

What is type () in Python?

Python type() The type() function either returns the type of the object or returns a new type object based on the arguments passed. The type() function has two different forms: type(object) type(name, bases, dict)

How do you make a 2D array in Python?


  1. # Write a program to insert the element into the 2D (two dimensional) array of Python.
  2. from array import * # import all package related to the array.
  3. arr1 = [[1, 2, 3, 4], [8, 9, 10, 12]] # initialize the array elements.
  4. print(“Before inserting the array elements: “)
  5. print(arr1) # print the arr1 elements.

What are the basic regular expression?

The most basic regular expression consists of a single literal character, such as a. It matches the first occurrence of that character in the string. In a programming language, there is usually a separate function that you can call to continue searching through the string after the previous match.

What is S in regular expression?

JavaScript RegExp \s Metacharacter The \s metacharacter is used to find a whitespace character. A whitespace character can be: A space character. A carriage return character. A new line character.

Can you use += in python?

+= adds a number to a variable, changing the variable itself in the process (whereas + would not). Similar to this, there are the following that also modifies the variable: -= , subtracts a value from variable, setting the variable to the result. *= , multiplies the variable and a value, making the outcome the variable.

What is a regular expression in Python?

A RegEx, or Regular Expression, is a sequence of characters that forms a search pattern. RegEx can be used to check if a string contains the specified search pattern.

What is %s and %D in Java?

There are many converters, flags, and specifiers, which are documented in java.util.Formatter. Here is a basic example: int i = 461012; System.out.format(“The value of i is: %d%n”, i); The %d specifies that the single variable is a decimal integer. The %n is a platform-independent newline character.

Is Python a keyword?

The is keyword is used to test if two variables refer to the same object. The test returns True if the two objects are the same object. The test returns False if they are not the same object, even if the two objects are 100% equal. Use the == operator to test if two variables are equal.

Is instance of list Python?

Use isinstance() to check if an object has type list. Call isinstance(object, class_or_tuple) with class_or_tuple as list to return True if object is an instance or subclass of list and False if otherwise.

What are the types of methods?

Most frequently used methods include:

  • Observation / Participant Observation.
  • Surveys.
  • Interviews.
  • Focus Groups.
  • Experiments.
  • Secondary Data Analysis / Archival Study.
  • Mixed Methods (combination of some of the above)

What is a 2D list Python?

1. Nested lists: processing and printing. In real-world Often tasks have to store rectangular data table. [ say more on this!] Such tables are called matrices or two-dimensional arrays. In Python any table can be represented as a list of lists (a list, where each element is in turn a list).

What will the regular expression match?

Python offers two different primitive operations based on regular expressions: match checks for a match only at the beginning of the string, while search checks for a match anywhere in the string (this is what Perl does by default).

How do I create a regular expression?

Related Articles

  1. Repeaters : * , + and { } :
  2. The asterisk symbol ( * ):
  3. The Plus symbol ( + ):
  4. The curly braces {…}:
  5. Wildcard – ( . )
  6. Optional character – ( ? )
  7. The caret ( ^ ) symbol: Setting position for match :tells the computer that the match must start at the beginning of the string or line.
  8. The dollar ( $ ) symbol.

What is G in JavaScript?

Definition and Usage The g modifier is used to perform a global match (find all matches rather than stopping after the first match). Tip: To perform a global, case-insensitive search, use this modifier together with the “i” modifier. Tip: Use the global property to specify whether or not the g modifier is set.

What does \\ s+ mean in Java?

\s – matches single whitespace character. \s+ – matches sequence of one or more whitespace characters.

Is instance of in Python?

The Python’s isinstance() function checks whether the object or variable is an instance of the specified class type or data type. Using Python isinstance(), you can do the followings: Test whether an object/variable is an instance of the specified type or class such as list, dict, set, or tuple.

What is 2D Numpy array?

2D array are also called as Matrices which can be represented as collection of rows and columns. In this article, we have explored 2D array in Numpy in Python. NumPy is a library in python adding support for large multidimensional arrays and matrices along with high level mathematical functions to operate these arrays.

How do I see the 2D list in Python?

Accessing a multidimensional list:

  1. Approach 1:
  2. Approach 2: Accessing with the help of loop.
  3. Approach 3: Accessing using square brackets.
  4. append(): Adds an element at the end of the list.
  5. extend(): Add the elements of a list (or any iterable), to the end of the current list.
  6. reverse(): Reverses the order of the list.

What is ++ A in Java?

Increment (++) and decrement (—) operators in Java programming let you easily add 1 to, or subtract 1 from, a variable. For example, using increment operators, you can add 1 to a variable named a like this: a++; An expression that uses an increment or decrement operator is a statement itself.

What is %d in printf?

We use printf() function with %d format specifier to display the value of an integer variable. Similarly %c is used to display character, %f for float variable, %s for string variable, %lf for double and %x for hexadecimal variable.

What does D+ mean in regex?

\d is a digit (a character in the range 0-9), and + means 1 or more times. So, \d+ is 1 or more digits. This is about as simple as regular expressions get. You should try reading up on regular expressions a little bit more. Google has a lot of results for regular expression tutorial, for instance.

Is Vs in Python?

There’s a subtle difference between the Python identity operator ( is ) and the equality operator ( == ). The == operator compares the value or equality of two objects, whereas the Python is operator checks whether two variables point to the same object in memory. …

What is a 2D array in Python?

It is an array of arrays. In this type of array the position of an data element is referred by two indices instead of one. So it represents a table with rows an dcolumns of data. In the below example of a two dimensional array, observer that each array element itself is also an array.

What does * do in Java?

The Arithmetic Operators

Operator Description
* (Multiplication) Multiplies values on either side of the operator.
/ (Division) Divides left-hand operand by right-hand operand.
% (Modulus) Divides left-hand operand by right-hand operand and returns remainder.
++ (Increment) Increases the value of operand by 1.