[定义字符在python中获得名称错误

Question

我是python的新手，正在尝试为类运行一些代码，但是我遇到了一个奇怪的错误提示，我只是为n和k设置了一个随机值，以查看代码是否可以工作

$python main.py
Traceback (most recent call last):
 File "main.py", line 10, in <module>
 while(k):
 NameError: name 'k' is not defined

这是我的代码，我定义了n和n都没有问题，但是k似乎是一个问题

def binary(n,k):
  n = 6 
  k = 1.5
    #'n' is the fractional number 
     #'k' is the number of bits up to the loop ; 
  integral = int(n) 
  fraction = n-integral 

 b = '.'
 while(k):
     fraction = fraction * 2
     fra_num = int(fraction)
     if (frac_num == 1):
         fraction = fraction - frac_num
         b = b + '1'
     else:
         b = b + '0'
         k = k - 1
 print b 

Answer 1

如所评论，您最大的问题是缩进。 while循环不在函数内部。尝试缩进：

def binary(n,k):
    n = 6 
    k = 1.5
    #'n' is the fractional number 
    #'k' is the number of bits up to the loop ; 
    integral = int(n) 
    fraction = n-integral 

    b = '.'
    while(k):
        fraction = fraction * 2
        fra_num = int(fraction)
        if (frac_num == 1):
            fraction = fraction - frac_num
            b = b + '1'
        else:
            b = b + '0'
            k = k - 1
    print b