How to use the pydevd.__file__ function in pydevd

def _build_launch_env():
    import os
    import pydevd

    environ = os.environ.copy()
    cwd = os.path.abspath(os.path.dirname(__file__))
    assert os.path.isdir(cwd)

    resources_dir = os.path.join(os.path.dirname(pydevd.__file__), 'tests_python', 'resources')
    assert os.path.isdir(resources_dir)

    attach_to_process_dir = os.path.join(os.path.dirname(pydevd.__file__), 'pydevd_attach_to_process')
    assert os.path.isdir(attach_to_process_dir)

    pydevd_dir = os.path.dirname(pydevd.__file__)
    assert os.path.isdir(pydevd_dir)

    environ['PYTHONPATH'] = (
            cwd + os.pathsep +
            resources_dir + os.pathsep +
            attach_to_process_dir + os.pathsep +
            pydevd_dir + os.pathsep +
            environ.get('PYTHONPATH', '')
    )
    return cwd, environ

def _build_launch_env():
    import os
    import pydevd

    environ = os.environ.copy()
    cwd = os.path.abspath(os.path.dirname(__file__))
    assert os.path.isdir(cwd)

    resources_dir = os.path.join(os.path.dirname(pydevd.__file__), 'tests_python', 'resources')
    assert os.path.isdir(resources_dir)

    attach_to_process_dir = os.path.join(os.path.dirname(pydevd.__file__), 'pydevd_attach_to_process')
    assert os.path.isdir(attach_to_process_dir)

    pydevd_dir = os.path.dirname(pydevd.__file__)
    assert os.path.isdir(pydevd_dir)

    environ['PYTHONPATH'] = (
            cwd + os.pathsep +
            resources_dir + os.pathsep +
            attach_to_process_dir + os.pathsep +
            pydevd_dir + os.pathsep +
            environ.get('PYTHONPATH', '')
    )
    return cwd, environ

def _build_launch_env():
    import os
    import pydevd

    environ = os.environ.copy()
    cwd = os.path.abspath(os.path.dirname(__file__))
    assert os.path.isdir(cwd)

    resources_dir = os.path.join(os.path.dirname(pydevd.__file__), 'tests_python', 'resources')
    assert os.path.isdir(resources_dir)

    attach_to_process_dir = os.path.join(os.path.dirname(pydevd.__file__), 'pydevd_attach_to_process')
    assert os.path.isdir(attach_to_process_dir)

    pydevd_dir = os.path.dirname(pydevd.__file__)
    assert os.path.isdir(pydevd_dir)

    environ['PYTHONPATH'] = (
            cwd + os.pathsep +
            resources_dir + os.pathsep +
            attach_to_process_dir + os.pathsep +
            pydevd_dir + os.pathsep +
            environ.get('PYTHONPATH', '')
    )
    return cwd, environ

_, port = s.getsockname()
    s.close()

import os
def _get_debugger_test_file(filename):
    try:
        rPath = os.path.realpath  # @UndefinedVariable
    except:
        # jython does not support os.path.realpath
        # realpath is a no-op on systems without islink support
        rPath = os.path.abspath

    return os.path.normcase(rPath(os.path.join(os.path.dirname(__file__), filename)))

import pydevd
PYDEVD_FILE = pydevd.__file__

import sys

import subprocess
import socket
import threading
import time
from pydev_imports import quote_plus, quote, unquote_plus


#=======================================================================================================================
# ReaderThread
#=======================================================================================================================
class ReaderThread(threading.Thread):

    def __init__(self, sock):

def _build_launch_env():
    import os
    import pydevd

    environ = os.environ.copy()
    cwd = os.path.abspath(os.path.dirname(__file__))
    assert os.path.isdir(cwd)

    resources_dir = os.path.join(os.path.dirname(pydevd.__file__), 'tests_python', 'resources')
    assert os.path.isdir(resources_dir)

    attach_to_process_dir = os.path.join(os.path.dirname(pydevd.__file__), 'pydevd_attach_to_process')
    assert os.path.isdir(attach_to_process_dir)

    pydevd_dir = os.path.dirname(pydevd.__file__)
    assert os.path.isdir(pydevd_dir)

    environ['PYTHONPATH'] = (
            cwd + os.pathsep +
            resources_dir + os.pathsep +
            attach_to_process_dir + os.pathsep +
            pydevd_dir + os.pathsep +
            environ.get('PYTHONPATH', '')
    )
    return cwd, environ

host=host,
    client={client},
    log_dir=log_dir,
    client_access_token=client_access_token,
)
"""
    python_code = python_code.replace("\r", "").replace("\n", "").format(**setup)
    log.info("Code to be injected: \n{0}", python_code.replace(";", ";\n"))

    # pydevd restriction on characters in injected code.
    assert not (
        {'"', "'", "\r", "\n"} & set(python_code)
    ), "Injected code should not contain any single quotes, double quotes, or newlines."

    pydevd_attach_to_process_path = os.path.join(
        os.path.dirname(pydevd.__file__), "pydevd_attach_to_process"
    )

    assert os.path.exists(pydevd_attach_to_process_path)
    sys.path.append(pydevd_attach_to_process_path)

    try:
        import add_code_to_python_process  # noqa

        log.info("Injecting code into process with PID={0} ...", pid)
        add_code_to_python_process.run_python_code(
            pid,
            python_code,
            connect_debugger_tracing=True,
            show_debug_info=int(os.getenv("PTVSD_ATTACH_BY_PID_DEBUG_INFO", "0")),
        )
    except Exception:

pydevd_comm.start_server = _start_server
    pydevd_comm.start_client = _start_client

    # This is invoked when a child process is spawned with multiproc debugging enabled.
    pydev_monkey.patch_args = multiproc.patch_and_quote_args
    if not options.multiprocess:
        # This means '--multiprocess' flag was not passed via command line args. Patch the
        # new process functions here to handle multiprocess being enabled via debug options.
        pydev_monkey.patch_new_process_functions()

    # Ensure that pydevd is using our functions.
    pydevd_module.start_server = _start_server
    pydevd_module.start_client = _start_client
    __main__ = sys.modules['__main__']
    if __main__ is not pydevd:
        if getattr(__main__, '__file__', None) == pydevd.__file__:
            __main__.start_server = _start_server
            __main__.start_client = _start_client

    return daemon

def get_pydevd_file():
    import pydevd
    f = pydevd.__file__
    if f.endswith('.pyc'):
        f = f[:-1]
    elif f.endswith('$py.class'):
        f = f[:-len('$py.class')] + '.py'
    return f

import sys
sys.path.insert(0, {ptvsd_path})
import ptvsd
del sys.path[0]

import ptvsd.options
ptvsd.options.client = True
ptvsd.options.host = {host}
ptvsd.options.port = {port}

ptvsd.enable_attach()
'''.format(**locals())
    print(code)

    pydevd_attach_to_process_path = os.path.join(
        os.path.dirname(pydevd.__file__),
        'pydevd_attach_to_process')
    sys.path.insert(0, pydevd_attach_to_process_path)
    from add_code_to_python_process import run_python_code
    run_python_code(pid, code, connect_debugger_tracing=True)

def get_pydevd_file():
    import pydevd
    f = pydevd.__file__
    if f.endswith('.pyc'):
        f = f[:-1]
    elif f.endswith('$py.class'):
        f = f[:-len('$py.class')] + '.py'
    return f