mirror of
https://github.com/aykhans/AzSuicideDataVisualization.git
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120 lines
3.3 KiB
Python
120 lines
3.3 KiB
Python
# Copyright 2018-2022 Streamlit Inc.
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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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import enum
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import types
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from typing import Any, Optional
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from streamlit import type_util
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from streamlit.errors import (
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StreamlitAPIWarning,
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StreamlitAPIException,
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)
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class CacheType(enum.Enum):
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MEMO = "experimental_memo"
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SINGLETON = "experimental_singleton"
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class UnhashableTypeError(Exception):
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pass
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class UnhashableParamError(StreamlitAPIException):
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def __init__(
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self,
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cache_type: CacheType,
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func: types.FunctionType,
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arg_name: Optional[str],
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arg_value: Any,
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orig_exc: BaseException,
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):
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msg = self._create_message(cache_type, func, arg_name, arg_value)
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super().__init__(msg)
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self.with_traceback(orig_exc.__traceback__)
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@staticmethod
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def _create_message(
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cache_type: CacheType,
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func: types.FunctionType,
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arg_name: Optional[str],
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arg_value: Any,
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) -> str:
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arg_name_str = arg_name if arg_name is not None else "(unnamed)"
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arg_type = type_util.get_fqn_type(arg_value)
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func_name = func.__name__
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arg_replacement_name = f"_{arg_name}" if arg_name is not None else "_arg"
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return (
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f"""
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Cannot hash argument '{arg_name_str}' (of type `{arg_type}`) in '{func_name}'.
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To address this, you can tell Streamlit not to hash this argument by adding a
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leading underscore to the argument's name in the function signature:
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```
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@st.{cache_type.value}
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def {func_name}({arg_replacement_name}, ...):
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...
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```
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"""
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).strip("\n")
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class CacheKeyNotFoundError(Exception):
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pass
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class CacheError(Exception):
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pass
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class CachedStFunctionWarning(StreamlitAPIWarning):
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def __init__(
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self,
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cache_type: CacheType,
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st_func_name: str,
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cached_func: types.FunctionType,
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):
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args = {
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"st_func_name": f"`st.{st_func_name}()` or `st.write()`",
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"func_name": self._get_cached_func_name_md(cached_func),
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"decorator_name": cache_type.value,
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}
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msg = (
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"""
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Your script uses %(st_func_name)s to write to your Streamlit app from within
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some cached code at %(func_name)s. This code will only be called when we detect
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a cache "miss", which can lead to unexpected results.
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How to fix this:
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* Move the %(st_func_name)s call outside %(func_name)s.
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* Or, if you know what you're doing, use `@st.%(decorator_name)s(suppress_st_warning=True)`
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to suppress the warning.
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"""
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% args
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).strip("\n")
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super().__init__(msg)
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@staticmethod
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def _get_cached_func_name_md(func: types.FunctionType) -> str:
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"""Get markdown representation of the function name."""
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if hasattr(func, "__name__"):
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return "`%s()`" % func.__name__
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else:
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return "a cached function"
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