Answer:- Python provides four modes to open files. The read-only (r), write-only (w), read-write (rw) and append mode (a). r is used to open a file in read-only mode, w is used to open a file in write-only mode, rw is used to open in reading and write mode, a is used to open a file in append mode. If the mode is not specified, by default file opens in read-only mode. - Read-only mode (r): Open a file for reading. It is the default mode. - Write-only mode (w): Open a file for writing. If the file contains data, data would be lost. Other a new file is created. - Read-Write mode (rw): Open a file for reading, write mode. It means updating mode. - Append mode (a): Open for writing, append to the end of the file, if the file exists.

Answer:- An operator is a particular symbol which is used on some values and produces an output as a result. An operator works on operands. Operands are numeric literals or variables which hold some values. Operators can be unary, binary or ternary. An operator which requires a single operand known as a unary operator, which require two operands known as a binary operator and which require three operands is called ternary operator.

Answer:- Python uses a rich set of operators to perform a variety of operations. Some individual operators like membership and identity operators are not so familiar but allow to perform operations. - Arithmetic OperatorsRelational Operators - Assignment Operators - Logical Operators - Membership Operators - Identity Operators - Bitwise Operators

Answer:- Arithmetic operators perform basic arithmetic operations. For example "+" is used to add and "?" is used for subtraction.

Answer:- Relational Operators are used to comparing the values. These operators test the conditions and then returns a boolean value either True or False.

Answer:- Assignment operators are used to assigning values to the variables.

Answer:- AssignmenLogical operators are used to performing logical operations like And, Or, and Not. t operators are used to assigning values to the variables.

Answer:- Membership operators are used to checking whether an element is a member of the sequence (list, dictionary, tuples) or not. Python uses two membership operators in and not in operators to check element presence.

Answer:- Bitwise Operators are used to performing operations over the bits. The binary operators (&, |, OR) work on bits.

Answer:- In Python 3, the old Unicode type has replaced by "str" type, and the string is treated as Unicode by default. We can make a string in Unicode by using art.title.encode("utf-8") function.

Answer:- Python is an interpreted language. The Python language program runs directly from the source code. It converts the source code into an intermediate language code, which is again translated into machine language that has to be executed. Unlike Java or C, Python does not require compilation before execution.

Answer:- Decorators are very powerful and a useful tool in Python that allows the programmers to add functionality to an existing code. This is also called metaprogramming because a part of the program tries to modify another part of the program at compile time. It allows the user to wrap another function to extend the behaviour of the wrapped function, without permanently modifying it.

Answer:- Decorators are very powerful and a useful tool in Python that allows the programmers to add functionality to an existing code. This is also called metaprogramming because a part of the program tries to modify another part of the program at compile time. It allows the user to wrap another function to extend the behaviour of the wrapped function, without permanently modifying it.

Answer:- Decorators are very powerful and a useful tool in Python that allows the programmers to add functionality to an existing code. This is also called metaprogramming because a part of the program tries to modify another part of the program at compile time. It allows the user to wrap another function to extend the behaviour of the wrapped function, without permanently modifying it.