All variables in a program may not be accessible at all locations in that program. This depends on where you have declared a variable. The scope of a variable determines the portion of the program where you can access a particular identifier. There are two basic scopes of variables in Python :
Variables that are defined inside a function body have a local scope, and those defined outside have a global scope. This means that local variables can be accessed only inside the function in which they are declared, whereas global variables can be accessed throughout the program body by all functions. When you call a function, the variables declared inside it are brought into scope. Following is a simple example :
Lambda functions are called anonymous because Lambda are not declared in the standard manner by using the def keyword. You can use the lambda keyword to create small anonymous functions. A lambda function can take any number of arguments, but can only have one expression.
lambda arguments : expression
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