英文:
Using random.choice in a loop
问题
import random
flips = 0
sides = ["blue", "blue", "blue", "blue", "yellow", "blue"]
while True:
side = random.choice(sides)
if side == "blue":
print(f"you flipped a blue")
flips += 1
elif side == "yellow":
print(f"you flipped a yellow!")
flips += 1
break
输出结果应该是随机的，每次执行都有可能是蓝色或黄色，并且会告诉你进行了多少次翻转。
英文:
I'm new to learning Python, currently learning Modules.
I'm stuck on this:
- Randomly choose an element until you choose "yellow", incrementing flips each time
- Print a message each time including how many flips have been executed and what the result was
import random
flips = 0
sides = ["blue", "blue", "blue", "blue", "yellow", "blue"]
side = random.choice(sides)
for side in sides:
if side == "blue":
print("you flipped a blue")
flips += 1
elif side =="yellow":
print("you flipped a yellow!")
flips += 1
break
the output i got for this was:
you flipped a blue
you flipped a blue
you flipped a blue
you flipped a blue
you flipped a yellow!
5
I can see here that it's just iterating through my sides list till it gets to "yellow". How do I fix this to actually be random??
答案1
得分: 1
你实际上可以使用 random.shuffle() 来对列表进行随机排序。
代码如下：
import random
flips = 0
sides = ["blue", "blue", "blue", "blue", "yellow", "blue"]
random.shuffle(sides)
for side in sides:
if side == "blue":
print("你翻到了蓝色")
flips += 1
elif side == "yellow":
print("你翻到了黄色！")
flips += 1
break
英文:
You can actually use random.shuffle() to random a list.
The code would be like this :
import random
flips = 0
sides = ["blue", "blue", "blue", "blue", "yellow", "blue"]
side = random.shuffle(sides)
for side in sides:
if side == "blue":
print("you flipped a blue")
flips += 1
elif side =="yellow":
print("you flipped a yellow!")
flips += 1
break
答案2
得分: 1
如果您熟悉while循环，可以在您的当前代码中使用它。您想要选择随机颜色，直到选择到'yellow'。对于这种特定情况，我建议使用while循环，因为它会重复执行，直到满足某个特定条件。以下是使用while循环满足您要求的更新代码：
import random
flips = 0
sides = ["blue", "blue", "blue", "blue", "yellow", "blue"]
while True:
side = random.choice(sides)
flips += 1
if side == "blue":
print("You flipped a blue.")
elif side == "yellow":
print("You flipped a yellow!")
break
print("Total flips:", flips)
如果您仍在考虑使用for循环，以下是您可以实现的代码：
import random
flips = 0
sides = ["blue", "blue", "blue", "blue", "yellow", "blue"]
random.shuffle(sides) # 随机打乱sides列表
for side in sides:
flips += 1
if side == "blue":
print("You flipped a blue.")
elif side == "yellow":
print("You flipped a yellow!")
break
print("Total flips:", flips)
请注意，上述代码均为Python代码，用于模拟选择颜色直到选择到'yellow'的情况。
英文:
If you are familiar with while loop you can use it in your current code. You want to choose random color until 'yellow' had been chosed. For this particular situation I suggest using while loop, because it iterates over until the certain condition is true. Here is updated code which satisfies the requirements you want using while loop.
import random
flips = 0
sides = ["blue", "blue", "blue", "blue", "yellow", "blue"]
while True:
side = random.choice(sides)
flips += 1
if side == "blue":
print("You flipped a blue.")
elif side == "yellow":
print("You flipped a yellow!")
break
print("Total flips:", flips)
If you still considering use of for loop here is the code you can implement:
import random
flips = 0
sides = ["blue", "blue", "blue", "blue", "yellow", "blue"]
random.shuffle(sides) # Shuffle the sides list randomly
for side in sides:
flips += 1
if side == "blue":
print("You flipped a blue.")
elif side == "yellow":
print("You flipped a yellow!")
break
print("Total flips:", flips)
答案3
得分: 0
你的代码现在将一个随机的面赋给变量 side
side = random.choice(sides)
但在循环中，你通过迭代 sides 列表重新赋值了这个变量。
for side in sides: # 在这里它被重新赋值
if side == "blue":
print("你翻到了蓝色")
flips += 1
elif side == "yellow":
print("你翻到了黄色！")
flips += 1
break
你所实现的功能与 sides 列表无关。你可以修改你的代码，使用一个 while 循环，因为你只想在特定条件下跳出循环。
while True:
side = random.choice(sides) # 每次都会重新赋值
if side == "blue":
print("你翻到了蓝色")
flips += 1
elif side == "yellow":
print("你翻到了黄色！")
flips += 1
break
# 其余部分的代码在这里
英文:
Your code right now assigns a random side to the variable side
side = random.choice(sides)
But after that in the for loop, you're reassigning the variable by iterating through sides list.
for side in sides: # here it gets reassigned
if side == "blue":
print("you flipped a blue")
flips += 1
elif side =="yellow":
print("you flipped a yellow!")
flips += 1
break
What you're achieving is independent of the sides list. You can modify your code and using a while loop, as you want to break free of the loop only after a certain condition.
while True:
side = random.choice(sides) # The side gets reassigned each time
if side == "blue":
print("you flipped a blue")
flips += 1
elif side =="yellow":
print("you flipped a yellow!")
flips += 1
break
# rest of your code here
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