370 lines
11 KiB
Python
370 lines
11 KiB
Python
# Copyright (c) Streamlit Inc. (2018-2022) Snowflake Inc. (2022-2024)
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""A script which is run when the Streamlit package is executed."""
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from __future__ import annotations
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import os
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import sys
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from typing import TYPE_CHECKING, Any, Callable, TypeVar
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# We cannot lazy-load click here because its used via decorators.
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import click
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import streamlit.runtime.caching as caching
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import streamlit.web.bootstrap as bootstrap
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from streamlit import config as _config
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from streamlit.runtime.credentials import Credentials, check_credentials
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from streamlit.web.cache_storage_manager_config import (
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create_default_cache_storage_manager,
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)
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if TYPE_CHECKING:
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from streamlit.config_option import ConfigOption
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ACCEPTED_FILE_EXTENSIONS = ("py", "py3")
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LOG_LEVELS = ("error", "warning", "info", "debug")
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def _convert_config_option_to_click_option(
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config_option: ConfigOption,
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) -> dict[str, Any]:
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"""Composes given config option options as options for click lib."""
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option = f"--{config_option.key}"
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param = config_option.key.replace(".", "_")
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description = config_option.description
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if config_option.deprecated:
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if description is None:
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description = ""
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description += (
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f"\n {config_option.deprecation_text} - {config_option.expiration_date}"
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)
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return {
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"param": param,
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"description": description,
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"type": config_option.type,
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"option": option,
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"envvar": config_option.env_var,
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"multiple": config_option.multiple,
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}
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def _make_sensitive_option_callback(config_option: ConfigOption):
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def callback(_ctx: click.Context, _param: click.Parameter, cli_value) -> None:
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if cli_value is None:
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return None
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raise SystemExit(
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f"Setting {config_option.key!r} option using the CLI flag is not allowed. "
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f"Set this option in the configuration file or environment "
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f"variable: {config_option.env_var!r}"
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)
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return callback
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F = TypeVar("F", bound=Callable[..., Any])
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def configurator_options(func: F) -> F:
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"""Decorator that adds config param keys to click dynamically."""
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for _, value in reversed(_config._config_options_template.items()):
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parsed_parameter = _convert_config_option_to_click_option(value)
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if value.sensitive:
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# Display a warning if the user tries to set sensitive
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# options using the CLI and exit with non-zero code.
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click_option_kwargs = {
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"expose_value": False,
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"hidden": True,
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"is_eager": True,
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"callback": _make_sensitive_option_callback(value),
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}
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else:
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click_option_kwargs = {
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"show_envvar": True,
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"envvar": parsed_parameter["envvar"],
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}
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config_option = click.option(
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parsed_parameter["option"],
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parsed_parameter["param"],
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help=parsed_parameter["description"],
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type=parsed_parameter["type"],
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multiple=parsed_parameter["multiple"],
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**click_option_kwargs,
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)
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func = config_option(func)
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return func
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def _download_remote(main_script_path: str, url_path: str) -> None:
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"""Fetch remote file at url_path to main_script_path"""
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import requests
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with open(main_script_path, "wb") as fp:
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try:
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resp = requests.get(url_path)
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resp.raise_for_status()
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fp.write(resp.content)
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except requests.exceptions.RequestException as e:
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raise click.BadParameter(f"Unable to fetch {url_path}.\n{e}")
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@click.group(context_settings={"auto_envvar_prefix": "STREAMLIT"})
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@click.option("--log_level", show_default=True, type=click.Choice(LOG_LEVELS))
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@click.version_option(prog_name="Streamlit")
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def main(log_level="info"):
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"""Try out a demo with:
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$ streamlit hello
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Or use the line below to run your own script:
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$ streamlit run your_script.py
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"""
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if log_level:
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from streamlit.logger import get_logger
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LOGGER = get_logger(__name__)
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LOGGER.warning(
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"Setting the log level using the --log_level flag is unsupported."
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"\nUse the --logger.level flag (after your streamlit command) instead."
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)
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@main.command("help")
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def help():
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"""Print this help message."""
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# We use _get_command_line_as_string to run some error checks but don't do
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# anything with its return value.
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_get_command_line_as_string()
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assert len(sys.argv) == 2 # This is always true, but let's assert anyway.
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# Pretend user typed 'streamlit --help' instead of 'streamlit help'.
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sys.argv[1] = "--help"
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main(prog_name="streamlit")
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@main.command("version")
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def main_version():
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"""Print Streamlit's version number."""
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# Pretend user typed 'streamlit --version' instead of 'streamlit version'
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import sys
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# We use _get_command_line_as_string to run some error checks but don't do
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# anything with its return value.
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_get_command_line_as_string()
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assert len(sys.argv) == 2 # This is always true, but let's assert anyway.
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sys.argv[1] = "--version"
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main()
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@main.command("docs")
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def main_docs():
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"""Show help in browser."""
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click.echo("Showing help page in browser...")
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from streamlit import cli_util
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cli_util.open_browser("https://docs.streamlit.io")
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@main.command("hello")
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@configurator_options
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def main_hello(**kwargs):
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"""Runs the Hello World script."""
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from streamlit.hello import streamlit_app
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bootstrap.load_config_options(flag_options=kwargs)
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filename = streamlit_app.__file__
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_main_run(filename, flag_options=kwargs)
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@main.command("run")
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@configurator_options
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@click.argument("target", required=True, envvar="STREAMLIT_RUN_TARGET")
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@click.argument("args", nargs=-1)
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def main_run(target: str, args=None, **kwargs):
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"""Run a Python script, piping stderr to Streamlit.
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The script can be local or it can be an url. In the latter case, Streamlit
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will download the script to a temporary file and runs this file.
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"""
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from streamlit import url_util
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bootstrap.load_config_options(flag_options=kwargs)
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_, extension = os.path.splitext(target)
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if extension[1:] not in ACCEPTED_FILE_EXTENSIONS:
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if extension[1:] == "":
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raise click.BadArgumentUsage(
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"Streamlit requires raw Python (.py) files, but the provided file has no extension.\nFor more information, please see https://docs.streamlit.io"
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)
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else:
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raise click.BadArgumentUsage(
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f"Streamlit requires raw Python (.py) files, not {extension}.\nFor more information, please see https://docs.streamlit.io"
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)
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if url_util.is_url(target):
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from streamlit.temporary_directory import TemporaryDirectory
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with TemporaryDirectory() as temp_dir:
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from urllib.parse import urlparse
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path = urlparse(target).path
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main_script_path = os.path.join(
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temp_dir, path.strip("/").rsplit("/", 1)[-1]
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)
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# if this is a GitHub/Gist blob url, convert to a raw URL first.
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target = url_util.process_gitblob_url(target)
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_download_remote(main_script_path, target)
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_main_run(main_script_path, args, flag_options=kwargs)
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else:
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if not os.path.exists(target):
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raise click.BadParameter(f"File does not exist: {target}")
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_main_run(target, args, flag_options=kwargs)
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def _get_command_line_as_string() -> str | None:
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import subprocess
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parent = click.get_current_context().parent
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if parent is None:
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return None
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if "streamlit.cli" in parent.command_path:
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raise RuntimeError(
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"Running streamlit via `python -m streamlit.cli <command>` is"
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" unsupported. Please use `python -m streamlit <command>` instead."
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)
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cmd_line_as_list = [parent.command_path]
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cmd_line_as_list.extend(sys.argv[1:])
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return subprocess.list2cmdline(cmd_line_as_list)
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def _main_run(
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file,
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args: list[str] | None = None,
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flag_options: dict[str, Any] | None = None,
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) -> None:
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if args is None:
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args = []
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if flag_options is None:
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flag_options = {}
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is_hello = _get_command_line_as_string() == "streamlit hello"
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check_credentials()
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bootstrap.run(file, is_hello, args, flag_options)
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# SUBCOMMAND: cache
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@main.group("cache")
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def cache():
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"""Manage the Streamlit cache."""
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pass
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@cache.command("clear")
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def cache_clear():
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"""Clear st.cache_data and st.cache_resource caches."""
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# in this `streamlit cache clear` cli command we cannot use the
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# `cache_storage_manager from runtime (since runtime is not initialized)
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# so we create a new cache_storage_manager instance that used in runtime,
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# and call clear_all() method for it.
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# This will not remove the in-memory cache.
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cache_storage_manager = create_default_cache_storage_manager()
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cache_storage_manager.clear_all()
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caching.cache_resource.clear()
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# SUBCOMMAND: config
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@main.group("config")
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def config():
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"""Manage Streamlit's config settings."""
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pass
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@config.command("show")
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@configurator_options
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def config_show(**kwargs):
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"""Show all of Streamlit's config settings."""
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bootstrap.load_config_options(flag_options=kwargs)
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_config.show_config()
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# SUBCOMMAND: activate
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@main.group("activate", invoke_without_command=True)
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@click.pass_context
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def activate(ctx):
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"""Activate Streamlit by entering your email."""
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if not ctx.invoked_subcommand:
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Credentials.get_current().activate()
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@activate.command("reset")
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def activate_reset():
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"""Reset Activation Credentials."""
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Credentials.get_current().reset()
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# SUBCOMMAND: test
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@main.group("test", hidden=True)
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def test():
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"""Internal-only commands used for testing.
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These commands are not included in the output of `streamlit help`.
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"""
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pass
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@test.command("prog_name")
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def test_prog_name():
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"""Assert that the program name is set to `streamlit test`.
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This is used by our cli-smoke-tests to verify that the program name is set
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to `streamlit ...` whether the streamlit binary is invoked directly or via
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`python -m streamlit ...`.
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"""
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# We use _get_command_line_as_string to run some error checks but don't do
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# anything with its return value.
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_get_command_line_as_string()
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parent = click.get_current_context().parent
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assert parent is not None
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assert parent.command_path == "streamlit test"
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if __name__ == "__main__":
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main()
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