python(19) Runtime Error(115) Invalid DISPLAY variable 言語処理100本ノック:37 未解決

# 言語処理100本ノック 2015
37. 頻度上位10語
http://www.cl.ecei.tohoku.ac.jp/nlp100/
「出現頻度が高い10語とその出現頻度をグラフ（例えば棒グラフなど）で表示せよ．」

素人の言語処理100本ノック:37
https://qiita.com/segavvy/items/72863888e51fabd79295

```
Traceback (most recent call last):
  File "./p37.py", line 61, in <module>
    align='center'
  File "/opt/conda/lib/python3.7/site-packages/matplotlib/pyplot.py", line 2764, in bar
    ax = gca()
  File "/opt/conda/lib/python3.7/site-packages/matplotlib/pyplot.py", line 969, in gca
    return gcf().gca(**kwargs)
  File "/opt/conda/lib/python3.7/site-packages/matplotlib/pyplot.py", line 586, in gcf
    return figure()
  File "/opt/conda/lib/python3.7/site-packages/matplotlib/pyplot.py", line 533, in figure
    **kwargs)
  File "/opt/conda/lib/python3.7/site-packages/matplotlib/backend_bases.py", line 161, in new_figure_manager
    return cls.new_figure_manager_given_figure(num, fig)
  File "/opt/conda/lib/python3.7/site-packages/matplotlib/backend_bases.py", line 167, in new_figure_manager_given_figure
    canvas = cls.FigureCanvas(figure)
  File "/opt/conda/lib/python3.7/site-packages/matplotlib/backends/backend_qt5agg.py", line 24, in __init__
    super(FigureCanvasQTAgg, self).__init__(figure=figure)
  File "/opt/conda/lib/python3.7/site-packages/matplotlib/backends/backend_qt5.py", line 234, in __init__
    _create_qApp()
  File "/opt/conda/lib/python3.7/site-packages/matplotlib/backends/backend_qt5.py", line 125, in _create_qApp
    raise RuntimeError('Invalid DISPLAY variable')
RuntimeError: Invalid DISPLAY variable
```

ソースは下記（コマンドとして実行したく１行目追記）

```
#!/usr/bin/env python
# coding: utf-8

import MeCab
from collections import Counter
import matplotlib.pyplot as plt
from matplotlib.font_manager import FontProperties

fname = 'neko.txt'
fname_parsed = 'neko.txt.mecab'

def parse_neko():
    with open(fname) as data_file, \
            open(fname_parsed, mode='w') as out_file:

        mecab = MeCab.Tagger()
        out_file.write(mecab.parse(data_file.read()))

def neco_lines():
    with open(fname_parsed) as file_parsed:

        morphemes = []
        for line in file_parsed:
            cols = line.split('\t')
            if(len(cols) < 2):
                #raise StopIteration
                break
            res_cols = cols[1].split(',')

            morpheme = {
                'surface': cols[0],
                'base': res_cols[6],
                'pos': res_cols[0],
                'pos1': res_cols[1],
            }
            morphemes.append(morpheme)

            if res_cols[1] == '句点':
                yield morphemes
                morphemes = []

parse_neko()

word_counter = Counter()
for line in neco_lines():
    word_counter.update([morpheme['surface'] for morpheme in line])

size = 10
list_word = word_counter.most_common(size)
print(list_word)

list_zipped = list(zip(*list_word))
words = list_zipped[0]
counts = list_zipped[1]

fp = FontProperties(fname='/Users/administrator/Library/Fonts/azuki.ttf')

plt.bar(
    range(0, size),
    counts,
    align='center'
)

plt.xticks(
    range(0, size),
    words,
    fontproperties=fp
)

plt.xlim(
    xmin=-1, xmax=size
)

plt.title(
    '37. 頻度上位10語',
    fontproperties=fp
)
plt.xlabel(
    '出現頻度が高い10語',
    fontproperties=fp
)
plt.ylabel(
    '出現頻度',
    fontproperties=fp
)

plt.grid(axis='y')

plt.show()
```
 38, 39も同様。

```
# ./p38.py
Traceback (most recent call last):
  File "./p38.py", line 56, in <module>
    range=(1, 20))
  File "/opt/conda/lib/python3.7/site-packages/matplotlib/pyplot.py", line 3122, in hist
    ax = gca()
  File "/opt/conda/lib/python3.7/site-packages/matplotlib/pyplot.py", line 969, in gca
    return gcf().gca(**kwargs)
  File "/opt/conda/lib/python3.7/site-packages/matplotlib/pyplot.py", line 586, in gcf
    return figure()
  File "/opt/conda/lib/python3.7/site-packages/matplotlib/pyplot.py", line 533, in figure
    **kwargs)
  File "/opt/conda/lib/python3.7/site-packages/matplotlib/backend_bases.py", line 161, in new_figure_manager
    return cls.new_figure_manager_given_figure(num, fig)
  File "/opt/conda/lib/python3.7/site-packages/matplotlib/backend_bases.py", line 167, in new_figure_manager_given_figure
    canvas = cls.FigureCanvas(figure)
  File "/opt/conda/lib/python3.7/site-packages/matplotlib/backends/backend_qt5agg.py", line 24, in __init__
    super(FigureCanvasQTAgg, self).__init__(figure=figure)
  File "/opt/conda/lib/python3.7/site-packages/matplotlib/backends/backend_qt5.py", line 234, in __init__
    _create_qApp()
  File "/opt/conda/lib/python3.7/site-packages/matplotlib/backends/backend_qt5.py", line 125, in _create_qApp
    raise RuntimeError('Invalid DISPLAY variable')
RuntimeError: Invalid DISPLAY variable

# ./p39.py
Traceback (most recent call last):
  File "./p39.py", line 54, in <module>
    plt.scatter(range(1, len(counts) + 1), counts)
  File "/opt/conda/lib/python3.7/site-packages/matplotlib/pyplot.py", line 3461, in scatter
    ax = gca()
  File "/opt/conda/lib/python3.7/site-packages/matplotlib/pyplot.py", line 969, in gca
    return gcf().gca(**kwargs)
  File "/opt/conda/lib/python3.7/site-packages/matplotlib/pyplot.py", line 586, in gcf
    return figure()
  File "/opt/conda/lib/python3.7/site-packages/matplotlib/pyplot.py", line 533, in figure
    **kwargs)
  File "/opt/conda/lib/python3.7/site-packages/matplotlib/backend_bases.py", line 161, in new_figure_manager
    return cls.new_figure_manager_given_figure(num, fig)
  File "/opt/conda/lib/python3.7/site-packages/matplotlib/backend_bases.py", line 167, in new_figure_manager_given_figure
    canvas = cls.FigureCanvas(figure)
  File "/opt/conda/lib/python3.7/site-packages/matplotlib/backends/backend_qt5agg.py", line 24, in __init__
    super(FigureCanvasQTAgg, self).__init__(figure=figure)
  File "/opt/conda/lib/python3.7/site-packages/matplotlib/backends/backend_qt5.py", line 234, in __init__
    _create_qApp()
  File "/opt/conda/lib/python3.7/site-packages/matplotlib/backends/backend_qt5.py", line 125, in _create_qApp
    raise RuntimeError('Invalid DISPLAY variable')
RuntimeError: Invalid DISPLAY variable
```

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