Error:
ValueError                                Traceback (most recent call last)
Input In [24], in <cell line: 3>()
      1 corr = df2.corr()
      2 plt.figure(figsize=(24,24))
----> 3 sns.heatmap(corr, annot=True, fmt = ".1ft")

File ~\miniconda3\envs\pump-failure-pred\lib\site-packages\seaborn\_decorators.py:46, in _deprecate_positional_args.<locals>.inner_f(*args, **kwargs)
     36     warnings.warn(
     37         "Pass the following variable{} as {}keyword arg{}: {}. "
     38         "From version 0.12, the only valid positional argument "
   (...)
     43         FutureWarning
     44     )
     45 kwargs.update({k: arg for k, arg in zip(sig.parameters, args)})
---> 46 return f(**kwargs)

File ~\miniconda3\envs\pump-failure-pred\lib\site-packages\seaborn\matrix.py:553, in heatmap(data, vmin, vmax, cmap, center, robust, annot, fmt, annot_kws, linewidths, linecolor, cbar, cbar_kws, cbar_ax, square, xticklabels, yticklabels, mask, ax, **kwargs)
    551 if square:
    552     ax.set_aspect("equal")
--> 553 plotter.plot(ax, cbar_ax, kwargs)
    554 return ax

File ~\miniconda3\envs\pump-failure-pred\lib\site-packages\seaborn\matrix.py:348, in _HeatMapper.plot(self, ax, cax, kws)
    346 # Annotate the cells with the formatted values
    347 if self.annot:
--> 348     self._annotate_heatmap(ax, mesh)

File ~\miniconda3\envs\pump-failure-pred\lib\site-packages\seaborn\matrix.py:256, in _HeatMapper._annotate_heatmap(self, ax, mesh)
    254 lum = relative_luminance(color)
    255 text_color = ".15" if lum > .408 else "w"
--> 256 annotation = ("{:" + self.fmt + "}").format(val)
    257 text_kwargs = dict(color=text_color, ha="center", va="center")
    258 text_kwargs.update(self.annot_kws)

ValueError: Invalid format specifier

corr = df2.corr()
plt.figure(figsize=(24,24))
sns.heatmap(corr, annot=True, fmt = ".1ft")