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Python Tips

Last updated at Posted at 2021-05-12

###配列の中に含まれるかどうか

hoge.py
        #domain_listが配列 target_domainが変数
        result=target_domain in domain_list

        #配列内にあればTrue
        if result:
            continue

###メインプログラムの書き出し
if __name__ == '__main__':」の呪文をつけておくと、外部ファイルからhoge.pyファイルを読み込まれたときに、勝手に実行されない。

hoge.py
if __name__ == '__main__':

###乱数を発生する

import random

#0-100の乱数を発生させる
i=random.uniform(0, 100)

#整数化(注意点あり)
seisu=int(i)

###フォルダ内のファイル名を取得する

#フォルダ内のファイルパスをすべて取得する
import glob
import os

files = glob.glob("./images/*")

for file in files:
    print(os.path.split(file)[1])

###csvの扱い

hoge.py
import csv

#読み込み
with open('data/src/sample.csv') as f:
    reader = csv.reader(f)
    for row in reader:
        print(row)

#書き込み
with open('data/temp/sample_writer_row.csv', 'w') as f:
    writer = csv.writer(f)
    writer.writerow([0, 1, 2])
    writer.writerow(['a', 'b', 'c'])

#追記
with open('data/temp/sample_writer_row.csv', 'a') as f:
    writer = csv.writer(f)
    writer.writerow(['X', 'Y', 'Z'])

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