Python - プロのようにデータを操る(正規表現、reモジュール(標準ライブラリ)、findallメソッド、パターン(特殊文字(単語境界)、メタ文字(文字クラス)))

入門 Python 3
原著
楽天ブックス(Kobo)

開発環境

• macOS Mojave - Apple
• Emacs (Text Editor)
• Python 3.7 (プログラミング言語)

入門 Python 3 (Bill Lubanovic (著)、斎藤 康毅 (監修)、長尾 高弘 (翻訳)、オライリージャパン)の7章(プロのようにデータを操る)、7.3(復習問題)7-7、8、9、10、11.を取り組んでみる。

コード(Emacs)

Python 3

#!/usr/bin/env python3
import re

print('7.')

with open('ODE ON THE MAMMOTH CHEESE.txt') as f:
    mammoth = f.read()

print(mammoth)

print('8.')
for word in re.findall(r'\ba\w*\b', mammoth):
    print(word)
print()

print('9.')
for word in re.findall(r'\bc\w{3}\b', mammoth):
    print(word)
print()

print('10.')
for word in re.findall(r'\b\w*r\b', mammoth):
    print(word)
print()

print('11.')
for word in re.findall(r'\b\w*[aeiou]{3}\w*\b', mammoth):
    print(word)

入出力結果(Terminal, Jupyter(IPython))

$ ./sample3.py
7.
    We have seen thee, queen of cheese,
    Lying quietly at your ease,
    Gently fanned by evening breeze,
    Thy fair form no flies dare seize.

    All gaily dressed soon you'll go
    To the great Provincial show,
    To be admired by many a beau
    In the city of Toronto.

    Cows numerous as a swarm of bees,
    Or as the leaves upon the trees,
    It did require to make thee please,
    And stand unrivalled, queen of cheese.

    May you not receive a scar as
    We have heard that Mr. Harris
    Intends to send you off as far as
    The great world's show at Paris.

    Of the youth beware of these,
    For some of them might rudely squeeze
    And bite your cheek, then songs or glees
    We could not sing, oh! queen of cheese.

    We'rt thou suspended from balloon,
    You'd cast a shade even at noon,
    Folks would think it was the moon
    About to fall and crush them soon.

8.
at
admired
a
as
a
as
a
as
as
as
at
a
at
and

9.
city
cast

10.
your
fair
Or
scar
Mr
far
For
your
or

11.
queen
quietly
beau
queen
squeeze
queen
$