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Environment Diagrams
Question 1
def square1(x):
return x * x
def square2(x):
print(x * x)
a = square1(3)
b = square2(3)
# How does return behave differently than print?Question 2
def square(x):
return x * x
def sum_of_squares(x, y):
return square(x) + square(y)
result = sum_of_squares(3, 4)
# How many times do we call mul?
# How many frames do we draw for mul?Question 3
from operator import add
first = add(3, 4)
def add(a, b):
return a + b
second = add(3, 4)
# What changes between the first time we call add and the
# second time? How does this affect our diagram?Question 4
score, opp_score = 0, 0
def assign(arg0, arg1):
score = arg0
opp_score = arg1
return True
success = assign(3, 9001)
# But did we really succeed?
# Did the global values of score and opp_score change?Question 5
goal = 100
def foo(x):
y = x + goal
return b
result = foo(4)
# What's the lookup procedure for goal?
# Does result ever show up in the diagram?Question 6
from operator import add, sub
def a_plus_abs_b(a, b):
if b < 0:
op = sub
else:
op = add
return op(a, b)
result = a_plus_abs_b(4, -4)