重ね書きしたグラフの画像出力ができない

Question

前提・実現したいこと

複数のデータを重ね書きしてグラフ化し、画像として出力したい。
x,yは辞書型でx[1]とy[1],x[2]とy[2],,,と重ね書きしたグラフの画像出力ができず困っています。

発生している問題・エラーメッセージ

---------------------------------------------------------------------------
FileNotFoundError                         Traceback (most recent call last)
<ipython-input-58-5b5d31b0ab22> in <module>
     20 plt.rcParams['axes.linewidth'] = 1.0
     21 plt.figure(figsize=(6.28,3.8))
---> 22 plt.savefig(str(fn)+'selfdischarge.png',transparent=True, dpi=300)
~\anaconda3\lib\site-packages\matplotlib\pyplot.py in savefig(*args, **kwargs)
    727 def savefig(*args, **kwargs):
    728     fig = gcf()
--> 729     res = fig.savefig(*args, **kwargs)
    730     fig.canvas.draw_idle()   # need this if 'transparent=True' to reset colors
    731     return res

~\anaconda3\lib\site-packages\matplotlib\figure.py in savefig(self, fname, transparent, **kwargs)
   2178             self.patch.set_visible(frameon)
   2179 
-> 2180         self.canvas.print_figure(fname, **kwargs)
   2181 
   2182         if frameon:

~\anaconda3\lib\site-packages\matplotlib\backend_bases.py in print_figure(self, filename, dpi, facecolor, edgecolor, orientation, format, bbox_inches, **kwargs)
   2089                     orientation=orientation,
   2090                     bbox_inches_restore=_bbox_inches_restore,
-> 2091                     **kwargs)
   2092             finally:
   2093                 if bbox_inches and restore_bbox:

~\anaconda3\lib\site-packages\matplotlib\backends\backend_agg.py in print_png(self, filename_or_obj, metadata, pil_kwargs, *args, **kwargs)
    528             renderer = self.get_renderer()
    529             with cbook._setattr_cm(renderer, dpi=self.figure.dpi), \
--> 530                     cbook.open_file_cm(filename_or_obj, "wb") as fh:
    531                 _png.write_png(renderer._renderer, fh,
    532                                self.figure.dpi, metadata=metadata)

~\anaconda3\lib\contextlib.py in __enter__(self)
    110         del self.args, self.kwds, self.func
    111         try:
--> 112             return next(self.gen)
    113         except StopIteration:
    114             raise RuntimeError("generator didn't yield") from None

~\anaconda3\lib\site-packages\matplotlib\cbook\__init__.py in open_file_cm(path_or_file, mode, encoding)
    445 def open_file_cm(path_or_file, mode="r", encoding=None):
    446     r"""Pass through file objects and context-manage `.PathLike`\s."""
--> 447     fh, opened = to_filehandle(path_or_file, mode, True, encoding)
    448     if opened:
    449         with fh:

~\anaconda3\lib\site-packages\matplotlib\cbook\__init__.py in to_filehandle(fname, flag, return_opened, encoding)
    430             fh = bz2.BZ2File(fname, flag)
    431         else:
--> 432             fh = open(fname, flag, encoding=encoding)
    433         opened = True
    434     elif hasattr(fname, 'seek'):

FileNotFoundError: [Errno 2] No such file or directory: "{1: '20210318_LIC321_wood_self_remain.csv2.csv', 2: '20210318_LIC322_maxsorb30_self_remain.csv2.csv', 3: '20210317_LIC_maxsorb30_2000_self_remain.csv2.csv', 4: '20210317_LIC319_maxsobr30_2400_self_remain.csv2.csv'}selfdischarge.png"

該当のソースコード

x = dict()
y = dict()
for i in range(1,5):
    x[i] = df[i]['TIME']
    y[i] = df[i]['V']
plt.plot(x[1],y[1], color = 'red',linewidth = 1, linestyle='solid')
plt.plot(x[2],y[2], color = 'blue',linewidth = 1, linestyle='solid')
plt.plot(x[3],y[3], color = 'black',linewidth = 1, linestyle='solid')
plt.plot(x[4],y[4], color = 'green',linewidth = 1, linestyle='solid')
plt.xlim(0,25)
plt.ylim(0,1)
plt.ylabel('Potential (V vs.Li$^{+}$/Li)')
plt.xlabel('Time (hour)')
plt.rcParams['font.family'] ='Arial'
plt.rcParams['xtick.direction'] = 'in'
plt.rcParams['ytick.direction'] = 'in'
plt.rcParams['xtick.major.width'] = 1.0
plt.rcParams['ytick.major.width'] = 1.0
plt.rcParams['font.size'] = 15 
plt.rcParams['axes.linewidth'] = 1.0
plt.figure(figsize=(6.28,3.8))
plt.savefig(str(fn)+'selfdischarge.png',transparent=True, dpi=300)

Answer 1

FileNotFoundError: [Errno 2] No such file or directory: "{1: '20210318_LIC321_wood_self_remain.csv2.csv', 2: '20210318_LIC322_maxsorb30_self_remain.csv2.csv', 3: '20210317_LIC_maxsorb30_2000_self_remain.csv2.csv', 4: '20210317_LIC319_maxsobr30_2400_self_remain.csv2.csv'}selfdischarge.png

ファイル、ディレクトリがない、といってますよ

Comments

[okabenzene]

初歩的なミスでした。
fnという変数は定義してなくて、fn[1],fn[2]...でした。
申し訳ないです。