Who developed Python?

Python is a modern, powerful, interpreted language with objects, modules, exceptions (or interrupts) and

automatic memory management. Salient Features of Python are:

⚫ Simple and Easy: Python is a simple language that is easy to learn.

⚫ Free/Open source: Anybody can use Python without the need to purchase a licence.

⚫ High-level Language: Being a high-level language, it can be easily understood by the user without the need to be concerned with low-level details. .

⚫ Portable: Python codes are machine and platform-independent.

⚫ Extensible and Embeddable: Python programs support usage of C/C++ codes.

⚫ Standard Library: Python standard library contains pre-written tools for programming .

Java and Python can be distinguished on the following bases:

1. Python programs run slower than Java codes, but Python saves much time and space. Python programs are 3 to 5 times smaller than Java programs.

2. Python is a loosely-typed dynamic language because no time gets wasted in declaring variable type as in Java.

3. Python is easier to learn than Java.

In interactive mode, instructions are given in front of Python prompt (>>>) in Python Shell. Python carries out the given instructions and shows the result there itself. In script mode, Python instructions are stored in a file, generally with .py extension, and executed together in one go as a unit. The saved instructions are known as Python script or Python program.

Ans. Every variable in Python holds an instance of an object. There are two types of objects in Python, Le Mutable and Immutable objects. Whenever an object is instantiated, it is assigned a unique object id The type of the object is defined at the runtime and it can't be changed afterwards. However, its state can be changed if it is a mutable object.

For example, int, float, bool, string, unicode, tuple are immutable objects in Python. In simple words, an immutable object can't be changed after it is created. Lists, dictionaries and sets are mutable types.

>>> result = 3.25 +4

>>> print (result, 'is', type (result)) 7.25 is <class 'float'>

Its type is a float as integers are automatically converted into floats as necessary.

Ans. The above statement, upon execution, shall result in an error since Python int command cannot convert the string "3.4" into 3.4 as Python cannot perform two consecutive typecasts, therefore, you must convert it explicitly in code. This statement is to be modified such as: int(float("3.4")) which shall generate the output as 3.