Check 9.2
Modify the given listSum function so that it only sums elements which are integers and ignores any non-int elements. You'll need to add either another base case or another recursive case to do this.
def listSum(lst):
if (len(lst) == 0):
return 0
else:
return lst[0] + listSum(lst[1:])
def testListSum():
print("Testing listSum()...", end="")
assert(listSum([2, 3, 5, 7, 11]) == 28)
assert(listSum([2, "foo", 5, 7.45, 6, "blah"]) == 13)
assert(listSum([]) == 0)
print("Done.")
testListSum()
import sys
def set_certificate(certificate_div_id, certificate):
document[certificate_div_id].textContent = certificate
def get_student_code(student_code_div_id):
raw_student_code = document[student_code_div_id].textContent
return window.patchCodeToCheckTimeout(raw_student_code, 'check_timeout();');
class captureIO:
def __init__(self):
self.captured = []
def get_output(self):
out = ""
for c in self.captured:
out += str(c)
return out
def write(self, data):
self.captured.append(data)
def flush(self):
pass
test_rec = """
certificate = []
def inject_counters():
def callCounter(f):
f.calls = 0
f.is_recursive = False
def g(*args):
f.calls += 1
initial_calls = f.calls
out = f(*args)
if (f.calls > initial_calls):
f.is_recursive = True
return out
return g, f
g = globals()
current_objects = list(g.items())
originals = []
for name, obj in current_objects:
try:
if callable(obj):
g[name], original = callCounter(obj)
originals.append(original)
except:
pass
return originals
def did_recur(originals):
return any(map(lambda f: f.is_recursive, originals))
originals = inject_counters()
listSum([2, "foo", 5, 7.45, 6, "blah"])
recurs = did_recur(originals)"""
def make_certificate(student_code_div_id, certificate_div_id):
student_code = get_student_code(student_code_div_id)
try:
execCapture = captureIO()
sys.stdout = execCapture
sys.stderr = execCapture
exec(student_code+"\n"+test_rec, globals())
if recurs:
tests = [[0.33719535793335975, 4.049922030841282, 2.8346364800472488], [8.288607679913653, 0.5578810793678838, 7, 3.03020190329081, 0.10992439885860306, 'JF\tpwF', 'n', 6], [7, 8, 'nTHn~/%V', 7], ['s2n.!Yq', 'Z8zyt!l&', 4, 4, 5, 'Y ^', 3.1401969696637524], ['KEA"O2b#', 2, 4.588950272172619, 'E', 4.354954854304068, 6.730889957307453], [0.9465660303232418, 3, 6.400836444740136, "9A`|7'\t}0"], ['DF?n~', 6.663596118456904], [5, 3.229447760945239, 6.7465759293229395], [8.07731922541752, '', 8, 3, 'S', 6, 'n \x0b+'], ['h,8y=Oo^m', 'oOr=b]f9A', 8.48277306850879], [8.812018579261194, "6(N'6Up", 6.382114634740901, 'aF8ze,~\t'], [0.9894418701948772, 6, 9, 1.2886390953818525, 4, 'l|aZ.', 'WGZ`x:F', 5, 7]]
test1 = [2, 3, 5, 7, 11]
test2, test3 = [2, "foo", 5, 7.45, 6, "blah"], []
tests.extend([test1, test2, test3])
for test in tests:
output = listSum(test)
certificate.append((output, type(output)))
set_certificate(certificate_div_id, str(certificate))
else: set_certificate(certificate_div_id, "Not Recursive")
except:
set_certificate(certificate_div_id, "error")