求大神，OS X怎么安装python3_python吧_百度贴吧
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求大神，OS X怎么安装python3收藏
如题，Mac OS X系统自带的是2.7版本，怎么安装3的版本呢，求大神指教！跪谢！！
黑马程序员训练营python,快乐编程就用python,打造Python前后端全栈开发工程师.python 总监级讲师授课,班主任,技术老师24小时跟踪辅导.
python的话使用正则表达式吧
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Python3 操作系统与路径 模块(os / os.path / pathlib)
本文由 Luzhuo 编写,转发请保留该信息.
原文: http://blog.csdn.net/Rozol/article/details/
以下代码以Python3.6.1 / windows10为例
Less is more!
__author__ = 'Luzhuo'
__date__ = ''
def os_demo():
dirs = os.popen("dir").read()
print(dirs)
dirs_info = os.scandir()
for info in dirs_info:
print("文件名: {}, 路径: {}, inode: {}, 文件夹? {}, 文件? {}, 链接? {}".format(info.name, info.path, info.inode(), info.is_dir(), info.is_file(), info.is_symlink()))
stats = info.stat()
print("&&& 访问时间: {}, 修改时间: {}, 模式修改时间: {}, 大小: {}".format(stats.st_atime, stats.st_ctime, stats.st_mtime, stats.st_size))
import signal
def os_func():
操作系统模块
该模块下的方法,对各个版本的兼容不明确,须谨慎使用.
测试版本: Python:3.6.1
Windows:Windows10,64bit
strs = os.name
strs = os.sep
strs = os.pathsep
strs = os.linesep
dics = os.environ
strs = os.getenv("Path", default=-1)
os.putenv("Path", "C:\\python")
os.unsetenv("Path")
strs = os.getlogin()
num = os.getpid()
num = os.system("cmd")
strs = os.popen("dir").read()
tups = os.times()
bytes = os.urandom(10)
num = os.cpu_count()
os.abort()
os.execl(r"C:\python", 'python', 'hello.py', 'i')
os._exit(0)
os.kill(8480, signal.SIGTERM)
strs = os.getcwd()
bytes = os.getcwdb()
os.chdir(r"C:\Windows")
strs = os.curdir
strs = os.pardir
strs = os.sep
bytes = os.fsencode(r"C:\c.obj")
strs = os.fsdecode(b"C:\c.obj")
os.chmod(r"C:\python\hello.py", 777)
os.link("file.txt", "file.txt.link")
os.symlink("file.txt", "file.txt.link")
lists = os.listdir()
tups = os.lstat(r"C:\c.obj")
boolean = os.access(r"C:\c.obj", os.F_OK)
lists = os.scandir()
tups = os.stat(".")
num = os.utime(r"C:\c.obj")
root, dirnames, filenames = os.walk(r"C:\python")
os.removedirs(r"c:\python")
os.mkdir("test")
os.makedirs(r"./t1/t2/t3")
os.rmdir("test")
os.mknod("test.txt")
os.remove("test.txt")
os.rename("text.txt", "file.txt")
os.renames("text.txt", "file.txt")
os.replace("text.txt", "file.txt")
tups = os.stat(r"text.txt")
fd = os.open(r"C:\c.obj", os.O_RDWR | os.O_CREAT)
readfd, writefd = os.pipe()
f = os.fdopen(readfd)
os.read(fd, 150)
os.write(fd, "String".encode("utf-8"))
os.fsync(fd)
os.ftruncate(fd, 100)
bytes = os.lseek(fd, 10, os.SEEK_SET)
fd_temp = os.dup(fd)
boolean = os.isatty(fd)
stat = os.fstat(fd)
strs = os.device_encoding(fd)
os.close(fd)
os.closerange(fd, fd)
for dir in os.scandir():
strs = dir.name
strs = dir.path
num = dir.inode()
boolean = dir.is_dir()
boolean = dir.is_file()
boolean = dir.is_symlink()
tups = dir.stat()
def path_demo():
path = os.getcwd()
print("路径: {}".format(path))
dirname = os.path.dirname(path)
print("文件夹名为: {}".format(dirname))
drive, path_t = os.path.splitdrive(path)
print("盘符为: {}".format(drive))
def path_func():
操作路径的函数
paths = [r'file.txt', r"/python/lib/hello.py", r"/python/local/text.txt", "C:/python/local", "C:/python/file.txt"]
strs = os.path.abspath(paths[0])
strs = os.path.basename(paths[1])
strs = os.path.dirname(paths[1])
strs = os.path.join("C:\\", r"a.txt")
dirname, filename = os.path.split(paths[1])
strs, text = os.path.splitext(paths[1])
drivename, pathname = os.path.splitdrive(paths[3])
size = os.path.getsize(paths[0])
strs = os.path.normcase(paths[1])
strs = os.path.normpath(paths[1])
strs = os.path.realpath(paths[1])
strs = os.path.relpath(paths[1])
boolean = os.path.exists(paths[1])
boolean = os.path.isabs(paths[1])
boolean = os.path.isfile(paths[1])
boolean = os.path.isdir(paths[1])
boolean = os.path.islink(paths[1])
boolean = os.path.ismount("C:\\")
boolean = os.path.supports_unicode_filenames
boolean = os.path.samefile(paths[0], paths[0])
boolean = os.path.sameopenfile(os.open(paths[0], 1), os.open(paths[0], 1))
boolean = os.path.samestat(os.stat(paths[0]), os.stat(paths[0]))
time_s = os.path.getatime(paths[0])
time_s = os.path.getmtime(paths[0])
time_s = os.path.getctime(paths[0])
import pathlib
def pathlib_demo():
path = pathlib.Path().home() / "python"
path_iter = path.iterdir()
for path in path_iter:
file_bool = path.is_file
if not file_bool:
print("&&& {}".format(path))
f = path.open()
data = f.readline()
print(data)
def pathlib_func():
适合于不同操作系统的类来对文件系统路径进行操作
path_pure = pathlib.PurePath('hello.py')
path_pure = pathlib.PurePath('python', 'hello.py')
path_pure = pathlib.PurePath(pathlib.Path('python'), pathlib.Path('hello.py'))
pathlib.PurePosixPath('hello') == pathlib.PurePosixPath('Hello')
pathlib.PureWindowsPath('hello') == pathlib.PureWindowsPath('hello')
pathlib.PureWindowsPath('hello') in {pathlib.PureWindowsPath('Hello')}
pathlib.PureWindowsPath('C:') & pathlib.PureWindowsPath('d:')
pathlib.PureWindowsPath('hello') == pathlib.PurePosixPath('hello')
path_pure = pathlib.PurePath('c:/')
path_pure = path_pure / 'python' / 'hello.py'
tups = path_pure.parts
drive = path_pure.drive
root = path_pure.root
driroot = path_pure.anchor
parents = path_pure.parents
parent = path_pure.parent
name = path_pure.name
suffix = path_pure.suffix
suffixs = path_pure.suffixes
name = path_pure.stem
path = path_pure.as_posix()
path = path_pure.as_uri()
path = path_pure.joinpath("a.txt", "b.txt")
path = path_pure.with_name("world.py")
path = path_pure.with_suffix(".txt")
boolean = path_pure.match("*.py")
boolean = path_pure.is_absolute()
path = pathlib.Path('hello.py')
path_s = path.cwd()
home = path.home()
state = path.stat()
state = path.lstat()
path.chmod(777)
path.lchmod(777)
lists = path.glob(r'*.py')
group = path.group()
iter = path.iterdir()
path.mkdir()
path.rmdir()
f = path.open()
bytes = path.read_bytes()
num = path.write_bytes(b"hello")
strs = path.read_text(encoding='utf-8')
num = path.write_text("hello")
ow = path.owner()
path.rename("new.txt")
path.replace("new.txt")
path_s = path.resolve()
path.symlink_to("hello.py", target_is_directory=False)
path.unlink()
path.touch()
boolean = path.exists()
boolean = path.is_dir()
boolean = path.is_file()
boolean = path.is_symlink()
boolean = path.is_block_device()
boolean = path.is_char_device
boolean = path.samefile(path)
if __name__ == "__main__":
path_demo()
pathlib_demo()
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