Default Value

It is recommended to assign default value as per your program need while creating variable.

In different context, C-style programming language has concept of auto assignment of default value in certain scenarios and garbage value comes in picture in different scenarios. In python, you do not need to declare variable separately. So, default value would not come from python, rather it would come from programmer.

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General approach

Note: This is general approach. Please judge if its matching with your program need.

Data Type	Default value can be...
bool	As per need
int	0 or As per need
float	0.0 or As per need
list	[ ] or list() or As per need
tuple	( ) or tuple() or As per need
array	empty array or As per need
set	set() or As per need
dict	{ } or dict() or As per need

# Example, Default value for bool, int, float, list, tuple, array, set, dictionary
my_bool = False
my_bool = True

my_int = 0
my_int = int()

my_float = 0.0
my_float = float()

my_list = []
my_list = list()

my_tuple = ()
my_tuple = tuple()

import array
my_array = array.array( 'i')

my_set = set()

my_dict = {}
my_dict = dict()