whitespaceフィルタの例

初回公開：2018/10/14
最終更新：未

サンプルコード

from pygments import highlight
from pygments.lexers import get_lexer_by_name
from pygments.formatters import HtmlFormatter

code=u"""
def add_func(a,b):
\treturn a+b

print add_func(2,3)
"""
lexer = get_lexer_by_name("python")
formatter = HtmlFormatter(encoding="utf-8")

with open("fileter_none.html", 'wb') as outfile:
    highlight(code, lexer, formatter,outfile)

lexer.add_filter('whitespace',spaces=True,tabs=True,newlines=True)
with open("filter_whitespace.html", 'wb') as outfile:
    highlight(code, lexer, formatter,outfile)

注意点としては、whitespaceフィルタはwhitespace文字の置き換えにユニコードの文字を使用する。
このため、highlight関数の結果をファイルに保存するにはHtmlFormatterのencodingオプションにutf-8を指定する必要がある。

実行結果

htmlコード

fileter_none.html

<div class="highlight"><pre><span></span><span class="k">def</span> <span class="nf">add_func</span><span class="p">(</span><span class="n">a</span><span class="p">,</span><span class="n">b</span><span class="p">):</span>
    <span class="k">return</span> <span class="n">a</span><span class="o">+</span><span class="n">b</span>

<span class="k">print</span> <span class="n">add_func</span><span class="p">(</span><span class="mi">2</span><span class="p">,</span><span class="mi">3</span><span class="p">)</span>
</pre></div>

filter_whitespace.html

<div class="highlight"><pre><span></span><span class="k">def</span><span class="w">·</span><span class="nf">add_func</span><span class="p">(</span><span class="n">a</span><span class="p">,</span><span class="n">b</span><span class="p">):</span><span class="w">¶</span>
<span class="w">»       </span><span class="k">return</span><span class="w">·</span><span class="n">a</span><span class="o">+</span><span class="n">b</span><span class="w">¶</span>
<span class="w">¶</span>
<span class="k">print</span><span class="w">·</span><span class="n">add_func</span><span class="p">(</span><span class="mi">2</span><span class="p">,</span><span class="mi">3</span><span class="p">)</span><span class="w">¶</span>
</pre></div>

html表示イメージ

fileter_none.html

def add_func(a,b):
    return a+b

print add_func(2,3)

filter_whitespace.html

def·add_func(a,b):¶
»       return·a+b¶
¶
print·add_func(2,3)¶