What are the rules for local and global variables in Python?

In python, the variables referenced inside a function are global. When a variable is assigned new value anywhere in the body of a function then it is assumed as local. In a function, if a variable ever assigned new value then the variable is implicitly local and explicitly it should be declared as global.

What are non iterable objects in Python?

In Python, objects can be broadly classified into one of the two groups, iterable or non-iterable. If an object is capable of returning its member value one by one its iterable; if it is not capable, it is non-iterable.

How many types of Python are there?

Python has six standard Data Types: Numbers. String. List. Tuple.

What is list data type in Python?

A list is a data structure in Python that is a mutable, or changeable, ordered sequence of elements. Each element or value that is inside of a list is called an item. Just as strings are defined as characters between quotes, lists are defined by having values between square brackets [ ] .

What are local variables in Python?

In general, a variable that is defined in a block is available in that block only. It is not accessible outside the block. Such a variable is called a local variable. In the following example, the name variable is initialized before the function definition. …

What is Python global variable?

In the programming world, a global variable in Python means having a scope throughout the program, i.e., a global variable value is accessible throughout the program unless shadowed. In other words, variables that are declared outside of a function are known as global variables.

What is iterate Python?

Iterator in python is an object that is used to iterate over iterable objects like lists, tuples, dicts, and sets. When we use a for loop to traverse any iterable object, internally it uses the iter() method to get an iterator object which further uses next() method to iterate over.

What types are iterable in Python?

Examples of iterables include all sequence types (such as list , str , and tuple ) and some non-sequence types like dict , file objects, and objects of any classes you define with an __iter__() method or with a __getitem__() method that implements Sequence semantics.

What is a global variable in Python?

6 days ago
In the programming world, a global variable in Python means having a scope throughout the program, i.e., a global variable value is accessible throughout the program unless shadowed. In other words, variables that are declared outside of a function are known as global variables.

What is an iterable collection in Python?

In Python everything is an object. When an object is said to be iterable, it means that you can step through (i.e. iterate) the object as a collection. Arrays for example are iterable.

What happens when a Python program is syntactically correct?

If a program is syntactically correct – that is, free of syntax errors – it will be run by the Python interpreter. However, the program may exit unexpectedly during execution if it encounters a runtime error – a problem which was not detected when the program was parsed, but is only revealed when a particular line is executed.

What is wrong with Python syntax errors?

Python will do its best to tell you where the error is located, but sometimes its messages can be misleading: for example, if you forget to escape a quotation mark inside a string you may get a syntax error referring to a place later in your code, even though that is not the real source of the problem.

What happens when an exception occurs in Python?

When an exception occurs, the normal flow of execution is interrupted. Python checks to see if the line of code which caused the exception is inside a try block. If it is, it checks to see if any of the except blocks associated with the try block can handle that type of exception.