Python报错File “「string」“, line 1, in 「module」 NameError: name ‘q‘ is not defined

Python报错File “”, line 1, in NameError: name ‘q’ is not defined

笔者运行环境：Python 2.7.17

print ("give me tow numbers,and i will divid them.")
print ("enter 'q' to quit.")

while True:
    first_number = input("\nFirst number:")
    if first_number == 'q':
        break
    second_number = input("second number:")
    if second_number =='q':
        break
    answer = int(first_number) / int(second_number)
    print(answer)

当输入“q”时会报错，File “”, line 1, in 。NameError: name ‘q’ is not defined

运行结果报错：

li@ubuntu:~/桌面/python$ python -u "/home/li/桌面/python/aa99.py"
give me tow numbers,and i will divid them.
enter 'q' to quit.

First number:q
Traceback (most recent call last):
  File "/home/li/桌面/python/aa99.py", line 7, in <module>
    first_number = input("\nFirst number:")
  File "<string>", line 1, in <module>
NameError: name 'q' is not defined

原因为Python版本问题，以上用法为Python3.x以上，Python3一下需要修改：

修改后：

将input修改为raw_input

print ("give me tow numbers,and i will divid them.")
print ("enter 'q' to quit.")

while True:
    first_number = raw_input("\nFirst number:")
    if first_number == 'q':
        break
    second_number = raw_input("second number:")
    if second_number =='q':
        break
    answer = int(first_number) / int(second_number)
    print(answer)

##运行结果 不报错

此时就不会报错了

li@ubuntu:~/桌面/python$ python -u "/home/li/桌面/python/aa99.py"
give me tow numbers,and i will divid them.
enter 'q' to quit.

First number:5
second number:2
2

First number:q

参考链接：
python 报错：str=input() File “”, line 1, in NameError: name ‘hello’ is not defined