df = pd.read_csv(URL, header=None, names=header_list, sep=’\s+’) # try ‘\t’

df.head()

NameError Traceback (most recent call last)
in ()
4 ‘k_width’, ‘asymmetry’, ‘g_length’, ‘k_class’
5 ]
----> 6 df = pd.read_csv(URL, header=None, names=header_list, sep=’\s+’) # try ‘\t’
7
8 df.head()

NameError: name ‘URL’ is not defined

url notdefine是为什么?前两天运行还没错

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