day6.md

第六天

索引

• Python标准库--pathlib
• Python好的文章你应该使用pathlib代替os.path
• Python代码片段
• Python读书--[Django企业开发实战day6])
• Python框架相关--Django与wsgi.ref
• Python项目相关--py12306
• Python之外--10分钟教会你看top

python标准库 pathlib

1. base

import pathlib

usr = pathlib.PurePosixPath('/usr')
print(usr)

usr_local = usr / 'local'
print(usr_local)

usr_share = usr / pathlib.PurePosixPath('share')
print(usr_share)

root = usr / '..'
print(root)

etc = root / '/etc/'
print(etc)


usr_local = pathlib.Path('/usr/local')
share = usr_local / '..' / 'share'
print(share.resolve())

root = pathlib.PurePosixPath('/')
subdirs = ['usr', 'local']
usr_local = root.joinpath(*subdirs)
print(usr_local)

2. replace glob

import pathlib

ind = pathlib.PurePosixPath('source/pathlib/index.rst')
print(ind)

py = ind.with_name('pathlib_from_existing.py')
print(py)

pyc = py.with_suffix('.pyc')
print(pyc)

3. Parsing Paths

import pathlib

p = pathlib.PurePosixPath('/usr/local')
print(p.parts)
p = pathlib.PurePosixPath('/usr/local/lib')

print('parent: {}'.format(p.parent))

print('\nhierarchy:')
for up in p.parents:
    print(up)

import pathlib

p = pathlib.PurePosixPath('./source/pathlib/pathlib_name.py')
print('path  : {}'.format(p))
print('name  : {}'.format(p.name))
print('suffix: {}'.format(p.suffix))
print('stem  : {}'.format(p.stem))

4. Directory Contents

import pathlib

p = pathlib.Path('.')

for f in p.iterdir():
    print(f)

p = pathlib.Path('..')

for f in p.glob('*.rst'):
    print(f)

5. Reading and Writing Files

import pathlib

f = pathlib.Path('example.txt')

f.write_bytes('This is the content'.encode('utf-8'))

with f.open('r', encoding='utf-8') as handle:
    print('read from open(): {!r}'.format(handle.read()))

print('read_text(): {!r}'.format(f.read_text('utf-8')))

6. os vs pathlib 这篇文字

Python代码片段--自动生成新的一天目录