TypeError: float() argument must be a string or a number, not 'Timestamp'

[plok1221]

hi,
I am follwing exactly the same scripts in Example Use:

`from lppls import lppls, data_loader
import numpy as np
import pandas as pd
from datetime import datetime as dt
%matplotlib inline

data = data_loader.nasdaq_dotcom()
time = [pd.Timestamp.toordinal(dt.strptime(t1, '%Y-%m-%d')) for t1 in data['Date']]
price = np.log(data['Adj Close'].values)
observations = np.array([time, price])
MAX_SEARCHES = 25
lppls_model = lppls.LPPLS(observations=observations)
tc, m, w, a, b, c, c1, c2, O, D = lppls_model.fit(MAX_SEARCHES)
lppls_model.plot_fit()
`
instead of the chart shown, I got an error message:
TypeError Traceback (most recent call last)
in
22
23 # visualize the fit
---> 24 lppls_model.plot_fit()
25
26 # should give a plot like the following...

~\Anaconda3\lib\site-packages\lppls\lppls.py in plot_fit(self, show_tc)
219 # fontsize=16)
220
--> 221 ax1.plot(time_ord, price, label='price', color='black', linewidth=0.75)
222 ax1.plot(time_ord, lppls_fit, label='lppls fit', color='blue', alpha=0.5)
223 # if show_tc:

~\Anaconda3\lib\site-packages\matplotlib\axes_axes.py in plot(self, scalex, scaley, data, *args, **kwargs)
1665 lines = [*self._get_lines(*args, data=data, **kwargs)]
1666 for line in lines:
-> 1667 self.add_line(line)
1668 self.autoscale_view(scalex=scalex, scaley=scaley)
1669 return lines

~\Anaconda3\lib\site-packages\matplotlib\axes_base.py in add_line(self, line)
1900 line.set_clip_path(self.patch)
1901
-> 1902 self._update_line_limits(line)
1903 if not line.get_label():
1904 line.set_label('_line%d' % len(self.lines))

~\Anaconda3\lib\site-packages\matplotlib\axes_base.py in _update_line_limits(self, line)
1922 Figures out the data limit of the given line, updating self.dataLim.
1923 """
-> 1924 path = line.get_path()
1925 if path.vertices.size == 0:
1926 return

~\Anaconda3\lib\site-packages\matplotlib\lines.py in get_path(self)
1025 """
1026 if self._invalidy or self._invalidx:
-> 1027 self.recache()
1028 return self._path
1029

~\Anaconda3\lib\site-packages\matplotlib\lines.py in recache(self, always)
668 if always or self._invalidx:
669 xconv = self.convert_xunits(self._xorig)
--> 670 x = _to_unmasked_float_array(xconv).ravel()
671 else:
672 x = self._x

~\Anaconda3\lib\site-packages\matplotlib\cbook_init_.py in _to_unmasked_float_array(x)
1388 return np.ma.asarray(x, float).filled(np.nan)
1389 else:
-> 1390 return np.asarray(x, float)
1391
1392

~\Anaconda3\lib\site-packages\numpy\core_asarray.py in asarray(a, dtype, order)
83
84 """
---> 85 return array(a, dtype, copy=False, order=order)
86
87

TypeError: float() argument must be a string or a number, not 'Timestamp'

could you please help to check?
Thanks