Python没有在else语句中运行我的代码

Question

我正在为CS61A做第一个Hog项目，CS61A是加州大学伯克利分校的CS入门课程，在线发布所有材料，以自学CS(链接：https://inst.eecs.berkeley.edu/\~cs61a/sp20/(对于它的第一个问题，它要求我实现一个函数，该函数基本上会掷骰子特定次数，并返回所有数字的总和，除非其中一个骰子给出数字1，在这种情况下，该函数将返回1。

我有两个版本的代码。第一个版本有问题，但第二个版本通过了测试：

第一个版本：

def roll_dice(num_rolls, dice=six_sided):
"""Simulate rolling the DICE exactly NUM_ROLLS > 0 times. Return the sum of
the outcomes unless any of the outcomes is 1. In that case, return 1.
num_rolls:  The number of dice rolls that will be made.
dice:       A function that simulates a single dice roll outcome.
"""
# These assert statements ensure that num_rolls is a positive integer.
assert type(num_rolls) == int, 'num_rolls must be an integer.'
assert num_rolls > 0, 'Must roll at least once.'
# BEGIN PROBLEM 1
"*** YOUR CODE HERE ***"
# END PROBLEM 1
sum, k = 0, 1
pig_out = False
while k <= num_rolls:
curr = dice()
if curr == 1:
pig_out = True
else: 
sum += curr
k += 1
if pig_out:
return 1
else:
return sum

第二个版本：

def roll_dice(num_rolls, dice=six_sided):
"""Simulate rolling the DICE exactly NUM_ROLLS > 0 times. Return the sum of
the outcomes unless any of the outcomes is 1. In that case, return 1.
num_rolls:  The number of dice rolls that will be made.
dice:       A function that simulates a single dice roll outcome.
"""
# These assert statements ensure that num_rolls is a positive integer.
assert type(num_rolls) == int, 'num_rolls must be an integer.'
assert num_rolls > 0, 'Must roll at least once.'
# BEGIN PROBLEM 1
"*** YOUR CODE HERE ***"
# END PROBLEM 1
sum, k = 0, 1
pig_out = False
while k <= num_rolls:
curr = dice()
if curr == 1:
pig_out = True
sum += curr
k += 1
if pig_out:
return 1
else:
return sum

在第一个例子中，如果我在python intelpreter中运行roll_dice(1，make_test_dice(2，3，4((，它会给我3，而它应该给我2(make_test_dice((返回一个骰子，它按照预先指定的顺序给出数字。例如，如果我运行make_test_dice(2，3，4(((一次，make_test_dice(2、3、4(会给出2，如果运行2次，会给出3，如果运行3次，会得到4(。如果我只运行一次，Python似乎会跳过第一个数字，但我不知道为什么。我怀疑这与其他声明有关，但我不确定为什么会引起这样的问题。。。。如有任何信息，我们将不胜感激！

我在问题的正文中具体说明了我所尝试的内容。

Answer 1

您似乎不可能得到不同的结果。你运行它时可能有不同的设置？除非你分享测试用例，否则我们真的帮不了多少忙。

您的代码似乎过于复杂。这更简单：

def roll_dice(num_rolls, dice=six_sided):
"""Simulate rolling the DICE exactly NUM_ROLLS > 0 times. Return the sum of
the outcomes unless any of the outcomes is 1. In that case, return 1.
num_rolls:  The number of dice rolls that will be made.
dice:       A function that simulates a single dice roll outcome.
"""
# These assert statements ensure that num_rolls is a positive integer.
assert type(num_rolls) == int, 'num_rolls must be an integer.'
assert num_rolls > 0, 'Must roll at least once.'
# BEGIN PROBLEM 1
"*** YOUR CODE HERE ***"
# END PROBLEM 1
sum = 0
for _ in range(num_rolls):
curr = dice()
if curr == 1:
return 1
sum += curr
return sum