python中定义的字符获取名称错误

Question

我对python很陌生，正在尝试为class运行一些代码，但我遇到了一个奇怪的错误，我只是为n和k输入了一个随机值，看看代码是否能在中工作

$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，我已经定义了n，n工作没有问题，但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

如前所述，这里最大的问题是缩进。while循环不在函数内。试试这个压痕：

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