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CS1 Python Subgoals

Section 9.4 Evaluate Functions-WE2-P1

Subgoals for evaluating a function call:.

  1. Create stack frame for global variables
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  2. Ensure function is defined before function call before beginning body of function
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  3. Determine parameter values based on positional arguments, keyword arguments, and default values to initialize local variables
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  4. Use stack frame for function to trace local variables
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  5. At return to call site, pass values back to call site
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  6. Delete stack frame with local variables after return to call site
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Exercises Exercises

1.

Q6: What is the output of the following code?
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a = 10
c = 3
def foo(a, b):
    b += a
    return bar(b, c)
def bar(alpha, beta):
    return alpha // beta
result = foo(2, 4)
print(result)
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2.

Q7: What is the output of the following code?
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def alpha(var1):
    return var1 - 5
def beta(var1):
    return var1 * var1
my_var = 3
result = alpha(beta(my_var))
print(result)
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3.

Q8: What is the output of the following code?
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a = 3
b = 4
def foo(a, b=10, c=3, d=1):
    return (a - d) // ( b + c )
c = 1
result = foo(13, 1, c=2)
print(result)
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4.

Q9: What is the output of the following code?
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def foo(alpha, beta=3, gamma=5):
    beta += gamma
    return beta / alpha
beta = 5
result = foo(4, gamma=1)
print(result)
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5.

Q10: What is the output of the following code?
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a = 1
def hello():
    return "Hello " * a
a = 3
result = hello()
print(result)
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