Python is a very popular interpreted programming language with the features like strongly typed, dynamically typed, object oriented (i.e. polymorphism, inheritance & encapsulation) & supports functional programming. Also, introduces beginner terminologies like packages, modules, classes, objects, attributes, member variables, class variables, methods & functions. These are are all must-know for beginner level interviews & basic coding tests.…
Assumes that Python3 is installed as described in Getting started with Python.
Iterators don’t compute the value of each item when instantiated. They only compute it when you ask for it. This is known as lazy evaluation. Lazy evaluation is useful when you have a very large data set to compute.…
Q. What is a comprehension?
A. Comprehensions are constructs that allow sequences to be built from other sequences. Python 2.0 introduced list comprehensions and Python 3.0 comes with dictionary, set and generator comprehensions.
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$ python3 >>> list1 = [1,2,3,4,5] >>> times2_list = [ x * 2 for x in list1 ] >>> print(times2_list) [2, 4, 6, 8, 10] >>> |
Given a list return a set.…
Q. What is a Python context manager?
A. The most common use of context managers is to properly manage resources. Context managers are a way of allocating and releasing some sort of resource exactly where you need it. The simplest example is file access:
The following code ensures that the file handle is closed, but very verbose.…
Q. Are functions objects in Python? A. Yes. In Python, a function is an object of type function. A function being an object means it is possible to pass a…
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Q. How would you go about debugging Python code? A. Firstly, import pdb
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import pdb |
Secondly, use “pdb.set_trace()” where ever you want the execution to pause as shown below with “addition.py”…
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Q1. What is an Object introspection? A1. It is the ability to determine type & properties of objects at runtime. Everything in Python is an object. Every object in Python…
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Q1. What is a dictionary in Python? A1. A dictionary is a general-purpose data structure for storing a group of objects as a set of keys and each key has…
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Q1. What is Python data modelling? A1. Objects are Python’s abstraction for data. All data in a Python program is represented by objects or by relations between objects. As an…
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Strings in Python can be defined using either single or double quotations as they are functionally equivalent. In addition, it is possible to define multi-line strings using a triple-quote syntax:…
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