Explain how to delete a file in Python?
Answer:
By using a command os.remove (filename) or os.unlink(filename)
ViewExplain how can you make a Python Script executable on Unix?
Answer:
To make a Python Script executable on Unix, you need to do two things,
How can you share global variables across modules?
Answer:
To share global variables across modules within a single program, create a special module. Import the config module in all modules of your application. The module will be available as a global variable across modules.
ViewMention what are the rules for local and global variables in Python?
Answer:
Local variables: If a variable is assigned a new value anywhere within the function’s body, it’s assumed to be local.
Global variables: Those variables that are only referenced inside a function are implicitly global.
ViewWhat is module and package in Python?
Answer:
In Python, module is the way to structure program. Each Python program file is a module, which imports other modules like objects and attributes.
The folder of Python program is a package of modules. A package can have modules or subfolders.
ViewWhat is the difference between Xrange and range?
Answer:
Xrange returns the xrange object while range returns the list, and uses the same memory and no matter what the range size is.
ViewHow you can convert a number to a string?
Answer:
In order to convert a number into a string, use the inbuilt function str(). If you want a octal or hexadecimal representation, use the inbuilt function oct() or hex().
ViewWhat is negative index in Python?
Answer:
Python sequences can be index in positive and negative numbers. For positive index, 0 is the first index, 1 is the second index and so forth. For negative index, (-1) is the last index and (-2) is the second last index and so forth.
ViewHow can you copy an object in Python?
Answer:
To copy an object in Python, you can try copy.copy () or copy.deepcopy() for the general case. You cannot copy all objects but most of them.
ViewWhat is docstring in Python?
Answer:
A Python documentation string is known as docstring, it is a way of documenting Python functions, modules and classes.
ViewWhat are generators in Python?
Answer:
The way of implementing iterators are known as generators. It is a normal function except that it yields expression in the function.
ViewIn Python what is slicing?
Answer:
A mechanism to select a range of items from sequence types like list, tuple, strings etc. is known as slicing.
ViewWhat is unittest in Python?
Answer:
A unit testing framework in Python is known as unittest. It supports sharing of setups, automation testing, shutdown code for tests, aggregation of tests into collections etc.
ViewIn Python what are iterators?
Answer:
In Python, iterators are used to iterate a group of elements, containers like list.
ViewWhat is pass in Python?
Answer:
Pass means, no-operation Python statement, or in other words it is a place holder in compound statement, where there should be a blank left and nothing has to be written there.
ViewWhy lambda forms in python does not have statements?
Answer:
A lambda form in python does not have statements as it is used to make new function object and then return them at runtime.
ViewWhat is lambda in Python?
Answer:
It is a single expression anonymous function often used as inline function.
ViewWhat is namespace in Python?
Answer:
In Python, every name introduced has a place where it lives and can be hooked for. This is known as namespace. It is like a box where a variable name is mapped to the object placed. Whenever the variable is searched out, this box will be searched, to get corresponding object.
ViewWhat are the built-in type does python provides?
Answer:
There are mutable and Immutable types of Pythons built in types Mutable built-in types
Immutable built-in types
What is Dict and List comprehensions are?
Answer:
They are syntax constructions to ease the creation of a Dictionary or List based on existing iterable.
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