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@natsu-re

Python: コメント文を認識してスキップする

More than 1 year has passed since last update.

以下の入力ファイルがあり、コメント文を#で示しているとする。

# title 
 # subtitile
aaa
bbb
ccc

コメント文だと認識させるには、文字列のメソッドであるstartswithを使用すれば良い。
例えば、以下のPythonのコードを動かしてみる:

with open("test.txt") as fin:
    for line in fin:
        if line.startswith("#"): continue
        print(line.rstrip())

すると

    #
aaa
bbb
ccc

おや、これでは#の前に空白があるとコメント文だと認識してくれないようだ。この問題を解決するためには、line.startswith("#")line.strip().startswith("#")に変えれば良い:

with open("test.txt") as fin:
    for line in fin:
        if line.strip().startswith("#"): continue
        print(line.rstrip())

すると

aaa
bbb
ccc

となり解決。

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Help us understand the problem. What is going on with this article?