Python variable annotations

Files in directory

filenames	description
0-add	Add two integers
1-concat	Concatenate strings
2-floor	Floor of a float number
3-to_str	To string
4-define_variables	Define variables
5-sum_list	Sum list of integers
6-sum_mixed_list	Sum list of mixed integers and floats
7-to_kv	Type annotated function to_kv
8-make_multiplier	Make multiplier
9-element_length	Length of element
100-safe_first_element	Duck typing - first element of a sequence
101-safely_get_value	Safely get value
102-type_checking	Type checking