Python Note: When assigning a value to a string

There are three methods.

Example 1: Substitute only one
name = "juniskw"

print("Hello %s!" % name)
Example 2: Multiple assignments (tuples)
f_nm = "jun"
l_nm = "iskw"

print( "Hello %s%s" % (f_nm,l_nm,) )
Example 3: Multiple substitution (dictionary)
f_nm = "jun"
l_nm = "iskw"

print( "Hello %(first)s%(last)s!" % {'first':f_nm,'last':l_nm,} )

The output is the same in both cases ("Hello juniskw!"). Does it feel like using it properly according to the number to be substituted?

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