Answer:- The Python dictionary is a built-in data type. It defines a one-to-one relationship between keys and values. Dictionaries contain a pair of keys and their corresponding values. It stores elements in key and value pairs. The keys are unique whereas values can be duplicate. The key accesses the dictionary elements.

Answer:- The Python docstring is a string literal that occurs as the first statement in a module, function, class, or method definition. It provides a convenient way to associate the documentation. String literals occurring immediately after a simple assignment at the top are called "attribute docstrings". String literals occurring immediately after another docstring are called "additional docstrings". Python uses triple quotes to create docstrings even though the string fits on one line. Docstring phrase ends with a period (.) and can be multiple lines. It may consist of spaces and other special chars.

Answer:- The sequences in Python are indexed and it consists of the positive as well as negative numbers. The numbers that are positive uses 0 that is uses as first index and 1 as the second index and the process go on like that. The index for the negative number starts from -1 that represents the last index in the sequence and -2 as the penultimate index and the sequence carries forward like the positive number. The negative index is used to remove any new-line spaces from the string and allow the string to except the last character that is given as S[:-1]. The negative index is also used to show the index to represent the string in correct order.

Answer:- The Python pickle is defined as a module which accepts any Python object and converts it into a string representation. It dumps the Python object into a file using the dump function; this process is called Pickling. The process of retrieving the original Python objects from the stored string representation is called as Unpickling.

Answer:- Java and Python both are object-oriented programming languages. Lets compare both on some criteria given below: -Ease of use/ Java is Good / Python is Very Good -Coding Speed/ Java is Average/ Python is Excellent -Data types/ Java is Static type/ Python is Dynamic type -Data Science and Machine learning application/ Java is Average/ Python is Very Good

Answer:- Help() and dir() both functions are accessible from the Python interpreter and used for viewing a consolidated dump of built-in functions. Help() function: The help() function is used to display the documentation string and also facilitates us to see the help related to modules, keywords, and attributes. Dir() function: The dir() function is used to display the defined symbols.

Answer:- Python 2.x is an older version of Python. Python 3.x is newer and latest version. Python 2.x is legacy now. Python 3.x is the present and future of this language. The most visible difference between Python2 and Python3 is in print statement (function). In Python 2, it looks like print "Hello", and in Python 3, it is print ("Hello"). String in Python2 is ASCII implicitly, and in Python3 it is Unicode. The xrange() method has removed from Python 3 version. A new keyword as is introduced in Error handling.

Answer:- In Python, some amount of coding is done at compile time, but most of the checking such as type, name, etc. are postponed until code execution. Consequently, if the Python code references a user-defined function that does not exist, the code will compile successfully. The Python code will fail only with an exception when the code execution path does not exist.

Answer:- The enumerate() function is used to iterate through the sequence and retrieve the index position and its corresponding value at the same time.

Answer:- Since indexing starts from zero, an element present at 3rd index is 7. So, the output is 7.

Answer:- Type conversion refers to the conversion of one data type iinto another. - int() - converts any data type into integer type - float() - converts any data type into float type - ord() - converts characters into integer - hex() - converts integers to hexadecimal - oct() - converts integer to octal - tuple() - This function is used to convert to a tuple. - set() - This function returns the type after converting to set. - list() - This function is used to convert any data type to a list type. - dict() - This function is used to convert a tuple of order (key,value) into a dictionary. - str() - Used to convert integer into a string. - complex(real,imag) - This functionconverts real numbers to complex(real,imag) number.

Answer:- To send an email, Python provides smtplib and email modules. Import these modules into the created mail script and send mail by authenticating a user. It has a method SMTP(smtp-server, port). It requires two parameters to establish SMTP connection.

Answer:- Arrays and lists, in Python, have the same way of storing data. But, arrays can hold only a single data type elements whereas lists can hold any data type elements.

Answer:- The anonymous function in python is a function that is defined without a name. The normal functions are defined using a keyword "def", whereas, the anonymous functions are defined using the lambda function. The anonymous functions are also called as lambda functions.