Notebook

これは日々の作業を通して学んだことや毎日の生活で気づいたことをを記録しておく備忘録である。

HTML ファイル生成日時: 2024/11/02 17:34:23.235 (台灣標準時)

Python での正規表現の使用法の例

Python では、 re モジュールを使うことで、正規表現が利用可能である。

簡単な例

以下に、簡単な re モジュールの利用例を示す。

#!/usr/pkg/bin/python3.9

# importing regular expression module
import re

# string
string = 'Mon Jan 25 13:25:59 CST 2021'

# making a regular expression pattern
pattern = re.compile ('(\d{2}):(\d{2}):(\d{2})')

# pattern matching
match = re.search (pattern, string)

# printing result
print ("original string =", string)
if (match):
    hour   = int (match.group (1))
    minute = int (match.group (2))
    second = int (match.group (3))
    print ("HH:MM:SS = %02d:%02d:%02d" % (hour, minute, second) )

実際に、実行してみると、以下のようになる。
% ./test_re_0.py
original string = Mon Jan 25 13:25:59 CST 2021
HH:MM:SS = 13:25:59

別の例

もう一つの別の例は以下の通り。

#!/usr/pkg/bin/python3.9

# importing regular expression module
import re

# string
string = 'Mon Jan 25 13:25:59 CST 2021'

# making a regular expression pattern
pattern = re.compile ('^(\S+)\s+(\S+)\s+(\S+)\s+(\d+:\d+:\d+)\s+(\S+)\s+(\d+)$')

# pattern matching
match = re.search (pattern, string)

# printing result
print ("original string =", string)
if (match):
    dayofweek = match.group (1)
    month     = match.group (2)
    day       = int (match.group (3))
    hhmmss    = match.group (4)
    timezone  = match.group (5)
    year      = int (match.group (6))
    print ("%s %02d/%s/%04d (%s)" % (hhmmss, day, month, year, timezone) )

実行すると以下のようになる。
% ./test_re_1.py
original string = Mon Jan 25 13:25:59 CST 2021
13:25:59 25/Jan/2021 (CST)

参考文献



Frequently accessed files

  1. Computer___Python/20220518_0.html
  2. Computer___Network/20230726_00.html
  3. Computer___Network/20230516_00.html
  4. Misc___Taiwan/20240207_00.html
  5. Computer___FreeBSD/20220621_0.html
  6. Computer___Python/20220715_0.html
  7. Food___Taiwan/20220429_0.html
  8. Computer___Network/20230508_00.html
  9. Computer___NetBSD/20220817_3.html
  10. Computer___Python/20220410_0.html
  11. Computer___Network/20240416_00.html
  12. Computer___Debian/20210223_1.html
  13. Computer___Network/20240130_00.html
  14. Computer___Python/20210124_0.html
  15. Computer___NetBSD/20230119_00.html
  16. Computer___Python/20221013_0.html
  17. Computer___NetBSD/20220428_0.html
  18. Computer___NetBSD/20220818_1.html
  19. Science___Math/20220420_0.html
  20. Computer___NetBSD/20240101_02.html
  21. Computer___TeX/20230503_00.html
  22. Computer___NetBSD/20230515_00.html
  23. Computer___NetBSD/20220808_0.html
  24. Science___Astronomy/20220503_0.html
  25. Computer___NetBSD/20210127_0.html
  26. Computer___Python/20240101_00.html
  27. Computer___Network/20220413_1.html
  28. Computer___NetBSD/20210204_0.html
  29. Computer___Python/20220816_1.html
  30. Travel___Taiwan/20220809_2.html


HTML file generated by Kinoshita Daisuke.