2022-05-23 00:16:32 +04:00

126 lines
4.0 KiB
Python

# Copyright 2018-2022 Streamlit Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from typing import List
import streamlit
def _show_beta_warning(name: str, date: str) -> None:
streamlit.warning(
f"Please replace `st.beta_{name}` with `st.{name}`.\n\n"
f"`st.beta_{name}` will be removed after {date}."
)
def function_beta_warning(func, date):
"""Wrapper for functions that are no longer in beta.
Wrapped functions will run as normal, but then proceed to show an st.warning
saying that the beta_ version will be removed in ~3 months.
Parameters
----------
func: callable
The `st.` function that used to be in beta.
date: str
A date like "2020-01-01", indicating the last day we'll guarantee
support for the beta_ prefix.
"""
def wrapped_func(*args, **kwargs):
# Note: Since we use a wrapper, beta_ functions will not autocomplete
# correctly on VSCode.
result = func(*args, **kwargs)
_show_beta_warning(func.__name__, date)
return result
# Update the wrapped func's name & docstring so st.help does the right thing
wrapped_func.__name__ = "beta_" + func.__name__
wrapped_func.__doc__ = func.__doc__
return wrapped_func
def object_beta_warning(obj, obj_name, date):
"""Wrapper for objects that are no longer in beta.
Wrapped objects will run as normal, but then proceed to show an st.warning
saying that the beta_ version will be removed in ~3 months.
Parameters
----------
obj: Any
The `st.` object that used to be in beta.
obj_name: str
The name of the object within __init__.py
date: str
A date like "2020-01-01", indicating the last day we'll guarantee
support for the beta_ prefix.
"""
has_shown_beta_warning = False
def show_wrapped_obj_warning():
nonlocal has_shown_beta_warning
if not has_shown_beta_warning:
has_shown_beta_warning = True
_show_beta_warning(obj_name, date)
class Wrapper:
def __init__(self, obj):
self._obj = obj
# Override all the Wrapped object's magic functions
for name in Wrapper._get_magic_functions(obj.__class__):
setattr(
self.__class__,
name,
property(self._make_magic_function_proxy(name)),
)
def __getattr__(self, attr):
# We handle __getattr__ separately from our other magic
# functions. The wrapped class may not actually implement it,
# but we still need to implement it to call all its normal
# functions.
if attr in self.__dict__:
return getattr(self, attr)
show_wrapped_obj_warning()
return getattr(self._obj, attr)
@staticmethod
def _get_magic_functions(cls) -> List[str]:
# ignore the handful of magic functions we cannot override without
# breaking the Wrapper.
ignore = ("__class__", "__dict__", "__getattribute__", "__getattr__")
return [
name
for name in dir(cls)
if name not in ignore and name.startswith("__")
]
@staticmethod
def _make_magic_function_proxy(name):
def proxy(self, *args):
show_wrapped_obj_warning()
return getattr(self._obj, name)
return proxy
return Wrapper(obj)