python中pathlib 面向对象的文件系统路径

import os
project_dir = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
print(project_dir)  # /Users/root/Code/project
print(type(project_dir))  # <class 'str'>

from pathlib import Path
project_dir = Path(__file__).resolve().parent.parent
print(project_dir)  # /Users/root/Code/project
print(type(project_dir))  # <class 'pathlib.PosixPath'>

file_list = []
for file in os.listdir(csv_dir):
    if not file.endswith('.csv'):
        continue
    file_list.append(file)

from pathlib import Path
csv_dir = Path(csv_dir)
file_list = csv_dir.glob('*.csv')

file_list = []
for root, dirs, files in os.walk('/Users/root/Code/project'):
  for f in files:
    if f.endswith('.py'):
      file_list.append(os.path.join(root, f))

# glob方法
from glob import glob
file_list = glob('/Users/root/Code/project/**/*.py', recursive=True)

file_list = csv_dir.rglob('*.csv')  # 生成器对象

from pathlib import Path
path = Path(__file__).resolve()
path
>>> /Users/root/Code/project/conf/path_conf.py

from pathlib import Path
path = Path(__file__).resolve()
path.parent
>>> /Users/root/Code/project/conf
path.parent.parent
>>> /Users/root/Code/project

from pathlib import Path
path = Path(__file__).resolve()
path.name
>>> path_conf.py
path.stem
>>> path_conf
path.suffix
>>> .py

from pathlib import Path
file = Path('data.csv')
new_file = file.with_name('result.csv')
new_file = file.with_suffix('.txt')

from pathlib import Path
root = Path(__file__).resolve().parent
# 方式1
conf_file = root / 'conf/path_conf.py'
# 方式2
conf_file = root / Path('conf/path_conf.py')
# 方式3
conf_file = root.joinpath('conf/path_conf.py')

from pathlib import Path
path = Path(__file__).resolve()
path.is_file()  # 是否为文件
path.is_dir()  # 是否为目录
path.exists()  # 是否存在

from pathlib import Path
file = Path(__file__).resolve()
file.touch()  # 新建文件
file.replace('../data.csv')  # 移动文件
file.unlink()  # 删除文件

file = Path('../data/1.csv')
data = file.read_text()  # 读取文件
data = file.write_text()  # 写入文件
# 也可以作为普通路径使用
with open(file, 'r') as f:
  data = f.read()