Final answer:
Python's design of compound statements utilizes indentation to determine the grouping of statements.
Step-by-step explanation:
One unusual aspect of Python's design of compound statements is the use of indentation to indicate the block of code within the statement. In most programming languages, such as C++ or Java, curly braces or keywords like 'begin' and 'end' are used to define blocks. In Python, the indentation level determines the grouping of statements. For example:
if x > 0:
print('x is positive')
print('This is inside the if statement')
else:
print('x is zero or negative')
print('This is inside the else statement')
In the above code snippet, the statements indented under 'if x > 0:' belong to the if statement, while those indented under 'else:' belong to the else statement.