yyyy-mm-ddが名前のファイルを大量生成

makefiles.py

import os , random , re , shutil
extention_list = ['.txt' , '.docx' , '.jpg']
project_path = './chapter09/project01'
os.makedirs(project_path, exist_ok=True)
for i in range(100):
    yyyy = random.randint(1972,2020)
    mm = random.randint(1,12)
    if mm < 10:
        mm = str(0) + str(mm)
    dd = random.randint(1,30)
    if dd < 10:
        dd = str(0) + str(dd)
    random_filename = str(yyyy) + '-' + str(mm) + '-' + str(dd) + extention_list[random.randint(0,4)]
    filename = open(os.path.join(project_path , random_filename) , 'w')
    filename.close()

退屈なことはPythonにやらせよう9.3でファイルがたくさん必要になったとき用

改良

import os , random , re , shutil
extention_list = ['.txt' , '.docx' , '.jpg']
project_path = './chapter09/project01'
os.makedirs(project_path, exist_ok=True)
for i in range(200):
    yyyy = random.randint(1972,2020)
    mm = random.randint(1,12)
    if mm < 10:
        mm = str(0) + str(mm)
    dd = random.randint(1,30)
    if dd < 10:
        dd = str(0) + str(dd)
    random_filename = f'{str(mm)}-{str(dd)}-{str(yyyy)}-{extention_list[random.randint(0,2)]}'
    filename = open(os.path.join(project_path , random_filename) , 'w')
    filename.close()```