matplotlib.dates loadtxt converters date conversion python 2 - date

Question

i am using juypter notebook and python 2.using matplotlib.dates I am unable to access the date
def bytespdate2num(fmt,encoding = 'utf-8'):
strconverter = mdates.strpdate2num(fmt)
def bytesconverter(b):
s = b.decode(encoding)
return strconverter(s)
return bytesconverter
Date,Open,High,Low,Close,Adjusted_close,Volume = np.loadtxt('C:\Users\harsh\Desktop\stock.txt', delimiter=',', unpack=True, converters ={0: bytespdate2num('%Y%m%d')})def bytespdate2num(fmt,encoding = 'utf-8'):
strconverter = mdates.strpdate2num(fmt)
def bytesconverter(b):
s = b.decode(encoding)
return strconverter(s)
return bytesconverter
Date,Open,High,Low,Close,Adjusted_close,Volume = np.loadtxt('C:\Users\harsh\Desktop\stock.txt', delimiter=',', unpack=True, converters ={0: bytespdate2num('%Y%m%d')})
the error message is:
> ValueErrorTraceback (most recent call last) <ipython-input-19-f69b316ac453> in <module>()
> 5 return strconverter(s)
> 6 return bytesconverter
> ----> 7 Date,Open,High,Low,Close,Adjusted_close,Volume = np.loadtxt('C:\Users\harsh\Desktop\stock.txt', delimiter=',',
> unpack=True, converters ={0: bytespdate2num('%Y%m%d')})
>
> C:\Users\harsh\Anaconda2\lib\site-packages\numpy\lib\npyio.pyc in
> loadtxt(fname, dtype, comments, delimiter, converters, skiprows,
> usecols, unpack, ndmin) 1022 1023 # Convert each
> value according to its column and store
> -> 1024 items = [conv(val) for (conv, val) in zip(converters, vals)] 1025 # Then pack it according to
> the dtype's nesting 1026 items = pack_items(items,
> packing)
>
> <ipython-input-19-f69b316ac453> in bytesconverter(b)
> 3 def bytesconverter(b):
> 4 s = b.decode(encoding)
> ----> 5 return strconverter(s)
> 6 return bytesconverter
> 7 Date,Open,High,Low,Close,Adjusted_close,Volume = np.loadtxt('C:\Users\harsh\Desktop\stock.txt', delimiter=',',
> unpack=True, converters ={0: bytespdate2num('%Y%m%d')})
>
> C:\Users\harsh\Anaconda2\lib\site-packages\matplotlib\dates.pyc in
> __call__(self, s)
> 287 return value: a date2num float
> 288 """
> --> 289 return date2num(datetime.datetime(*time.strptime(s, self.fmt)[:6]))
> 290
> 291
>
> C:\Users\harsh\Anaconda2\lib\_strptime.pyc in
> _strptime_time(data_string, format)
> 476
> 477 def _strptime_time(data_string, format="%a %b %d %H:%M:%S %Y"):
> --> 478 return _strptime(data_string, format)[0]
>
> C:\Users\harsh\Anaconda2\lib\_strptime.pyc in _strptime(data_string,
> format)
> 330 if not found:
> 331 raise ValueError("time data %r does not match format %r" %
> --> 332 (data_string, format))
> 333 if len(data_string) != found.end():
> 334 raise ValueError("unconverted data remains: %s" %
>
>
> ValueError: time data u'2017-07-26' does not match format '%Y%m%d'