为什么不再次打印问题？(Python) [复制]

def print_question():
    question = "What is your favorite color?"
    print(question)

print_question()
# 尝试在这里打印question变量会报错，因为question是局部变量
print(question)  # NameError: name 'question' is not defined

question = "What is your favorite color?"

def print_question():
    global question
    print(question)

print_question()
print(question)  # 这样就可以正常打印了

question = "What is your favorite color?"
print(question)

question = "What is your favorite food?"
# 这里尝试再次打印question会得到新的值
print(question)  # What is your favorite food?

question = "What is your favorite color?"
print(question)

# 程序在这里结束，没有再次打印的机会

question = "What is your favorite color?"
while True:
    print(question)
    # 可以添加一些逻辑来控制循环何时结束

question = input("Enter your question: ")
print(question)

# 尝试再次打印可能会因为缓冲区问题而失败
print(question)

import sys

question = input("Enter your question: ")
print(question)
sys.stdout.flush()  # 刷新缓冲区

# 现在可以再次打印
print(question)