Files
FastDeploy/fastdeploy/envs.py
T
Yonghua Li a7f52c300d [Feature] support v1 update/clear api for RL (#6761)
* [Feature] support v1 update/clear api for RL

* [fix] fix execute_model and add sleep/wakeup api

* [fix] fix mtp and key_prefix

* [chore] move _update_key_prefix to resume method

* [fix] make the interface safe to call multiple times

* [fix] fix some tiny bugs

* [chore] make small changes against pr review

* [docs] add docs for weight update

* [test] add some tests and update docs

* [style] fix code style check

* [test] fix ci

* [fix] fix stale control responses when control method timed out

* [chore] remove unused code

* [chore] fix code style

* [chore] optimize tags and key_prefix

* [test] fix ci

* [chore] fix code style

* [test] fix ci

* [fix] fix ep control

* [fix] fix ep control for engine cache queue
2026-03-25 19:18:46 +08:00

304 lines
18 KiB
Python

# Copyright (c) 2025 PaddlePaddle Authors. All Rights Reserved.
#
# 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.
"""
Environment variables used by FastDeploy.
"""
import os
import sys
from types import ModuleType
from typing import Any, Callable
def _validate_split_kv_size(value: int) -> int:
"""Validate FD_DETERMINISTIC_SPLIT_KV_SIZE is a positive power of 2."""
if value <= 0 or (value & (value - 1)) != 0:
raise ValueError(f"FD_DETERMINISTIC_SPLIT_KV_SIZE must be a positive power of 2, got {value}.")
return value
environment_variables: dict[str, Callable[[], Any]] = {
# Whether to use BF16 on CPU.
"FD_CPU_USE_BF16": lambda: os.getenv("FD_CPU_USE_BF16", "False"),
# Cuda architecture to build FastDeploy.This is a list of strings
# such as [80,90].
"FD_BUILDING_ARCS": lambda: os.getenv("FD_BUILDING_ARCS", "[]"),
# Log directory.
"FD_LOG_DIR": lambda: os.getenv("FD_LOG_DIR", "log"),
# Whether to use debug mode, can set 0 or 1
"FD_DEBUG": lambda: int(os.getenv("FD_DEBUG", "0")),
# Number of days to keep fastdeploy logs.
"FD_LOG_BACKUP_COUNT": lambda: os.getenv("FD_LOG_BACKUP_COUNT", "7"),
# Model download source, can set "AISTUDIO", "MODELSCOPE" or "HUGGINGFACE".
"FD_MODEL_SOURCE": lambda: os.getenv("FD_MODEL_SOURCE", "AISTUDIO"),
# Model download cache directory.
"FD_MODEL_CACHE": lambda: os.getenv("FD_MODEL_CACHE", None),
# Maximum number of stop sequences.
"FD_MAX_STOP_SEQS_NUM": lambda: int(os.getenv("FD_MAX_STOP_SEQS_NUM", "5")),
# Maximum length of stop sequences.
"FD_STOP_SEQS_MAX_LEN": lambda: int(os.getenv("FD_STOP_SEQS_MAX_LEN", "8")),
# GPU devices that will be used. This is a string that
# splited by comma, such as 0,1,2.
"CUDA_VISIBLE_DEVICES": lambda: os.getenv("CUDA_VISIBLE_DEVICES", None),
# Whether to use HuggingFace tokenizer.
"FD_USE_HF_TOKENIZER": lambda: bool(int(os.getenv("FD_USE_HF_TOKENIZER", "0"))),
# Set the high watermark (HWM) for receiving data during ZMQ initialization
"FD_ZMQ_SNDHWM": lambda: os.getenv("FD_ZMQ_SNDHWM", 0),
# cache kv quant params directory
"FD_CACHE_PARAMS": lambda: os.getenv("FD_CACHE_PARAMS", "none"),
# Set attention backend. "NATIVE_ATTN", "APPEND_ATTN"
# and "MLA_ATTN" can be set currently.
"FD_ATTENTION_BACKEND": lambda: os.getenv("FD_ATTENTION_BACKEND", "APPEND_ATTN"),
# Set sampling class. "base", "base_non_truncated", "air" and "rejection" can be set currently.
"FD_SAMPLING_CLASS": lambda: os.getenv("FD_SAMPLING_CLASS", "base"),
# Set moe backend."cutlass","marlin", "triton", "flashinfer-cutlass" and "flashinfer-trtllm" can be set currently.
"FD_MOE_BACKEND": lambda: os.getenv("FD_MOE_BACKEND", "cutlass"),
# Set mxfp4 backend."flashinfer" can be set currently.
"FD_MOE_MXFP4_BACKEND": lambda: os.getenv("FD_MOE_MXFP4_BACKEND", "flashinfer"),
# Whether to use Machete for wint4 dense gemm.
"FD_USE_MACHETE": lambda: os.getenv("FD_USE_MACHETE", "1"),
# Set whether to disable recompute the request when the KV cache is full.
"FD_DISABLED_RECOVER": lambda: os.getenv("FD_DISABLED_RECOVER", "0"),
# Set triton kernel JIT compilation directory.
"FD_TRITON_KERNEL_CACHE_DIR": lambda: os.getenv("FD_TRITON_KERNEL_CACHE_DIR", None),
# Whether transition from standalone PD decoupling to centralized inference
"FD_PD_CHANGEABLE": lambda: os.getenv("FD_PD_CHANGEABLE", "0"),
# Whether to use DeepGemm for FP8 blockwise MoE.
"FD_USE_DEEP_GEMM": lambda: bool(int(os.getenv("FD_USE_DEEP_GEMM", "0"))),
# Whether to use PFCCLab/DeepEP.
"FD_USE_PFCC_DEEP_EP": lambda: bool(int(os.getenv("FD_USE_PFCC_DEEP_EP", "0"))),
# Whether to use aggregate send.
"FD_USE_AGGREGATE_SEND": lambda: bool(int(os.getenv("FD_USE_AGGREGATE_SEND", "0"))),
# Whether to open Trace.
"TRACES_ENABLE": lambda: os.getenv("TRACES_ENABLE", "false"),
# set traec Server name.
"FD_SERVICE_NAME": lambda: os.getenv("FD_SERVICE_NAME", "FastDeploy"),
# set traec host name.
"FD_HOST_NAME": lambda: os.getenv("FD_HOST_NAME", "localhost"),
# set traec exporter.
"TRACES_EXPORTER": lambda: os.getenv("TRACES_EXPORTER", "console"),
# set traec exporter_otlp_endpoint.
"EXPORTER_OTLP_ENDPOINT": lambda: os.getenv("EXPORTER_OTLP_ENDPOINT"),
# set traec exporter_otlp_headers.
"EXPORTER_OTLP_HEADERS": lambda: os.getenv("EXPORTER_OTLP_HEADERS"),
# enable kv cache block scheduler v1 (no need for kv_cache_ratio)
"ENABLE_V1_KVCACHE_SCHEDULER": lambda: int(os.getenv("ENABLE_V1_KVCACHE_SCHEDULER", "1")),
# enable data processor v2
"ENABLE_V1_DATA_PROCESSOR": lambda: int(os.getenv("ENABLE_V1_DATA_PROCESSOR", "0")),
# set prealloc block num for decoder
"FD_ENC_DEC_BLOCK_NUM": lambda: int(os.getenv("FD_ENC_DEC_BLOCK_NUM", "2")),
# enbale max prefill of one execute step
"FD_ENABLE_MAX_PREFILL": lambda: int(os.getenv("FD_ENABLE_MAX_PREFILL", "0")),
# Whether to use PLUGINS.
"FD_PLUGINS": lambda: None if "FD_PLUGINS" not in os.environ else os.environ["FD_PLUGINS"].split(","),
# set trace attribute job_id.
"FD_JOB_ID": lambda: os.getenv("FD_JOB_ID"),
# support max connections
"FD_SUPPORT_MAX_CONNECTIONS": lambda: int(os.getenv("FD_SUPPORT_MAX_CONNECTIONS", "1024")),
# Offset for Tensor Parallelism group GID.
"FD_TP_GROUP_GID_OFFSET": lambda: int(os.getenv("FD_TP_GROUP_GID_OFFSET", "1000")),
# enable multi api server
"FD_ENABLE_MULTI_API_SERVER": lambda: bool(int(os.getenv("FD_ENABLE_MULTI_API_SERVER", "0"))),
"FD_FOR_TORCH_MODEL_FORMAT": lambda: bool(int(os.getenv("FD_FOR_TORCH_MODEL_FORMAT", "0"))),
# force disable default chunked prefill
"FD_DISABLE_CHUNKED_PREFILL": lambda: bool(int(os.getenv("FD_DISABLE_CHUNKED_PREFILL", "0"))),
# Whether to use new get_output and save_output method (0 or 1)
"FD_USE_GET_SAVE_OUTPUT_V1": lambda: bool(int(os.getenv("FD_USE_GET_SAVE_OUTPUT_V1", "0"))),
# Whether to enable model cache feature
"FD_ENABLE_MODEL_CACHE": lambda: bool(int(os.getenv("FD_ENABLE_MODEL_CACHE", "0"))),
# Whether to print scheduler prefill/decode batch logs.
"FD_CONSOLE_SCHEDULER_METRICS": lambda: bool(int(os.getenv("FD_CONSOLE_SCHEDULER_METRICS", "1"))),
# Decode log interval for scheduler metrics logs.
"FD_CONSOLE_DECODE_LOG_INTERVAL": lambda: int(os.getenv("FD_CONSOLE_DECODE_LOG_INTERVAL", "5")),
# enable internal module to access LLMEngine.
"FD_ENABLE_INTERNAL_ADAPTER": lambda: int(os.getenv("FD_ENABLE_INTERNAL_ADAPTER", "0")),
# LLMEngine receive requests port, used when FD_ENABLE_INTERNAL_ADAPTER=1
"FD_ZMQ_RECV_REQUEST_SERVER_PORT": lambda: os.getenv("FD_ZMQ_RECV_REQUEST_SERVER_PORT", None),
# LLMEngine send response port, used when FD_ENABLE_INTERNAL_ADAPTER=1
"FD_ZMQ_SEND_RESPONSE_SERVER_PORT": lambda: os.getenv("FD_ZMQ_SEND_RESPONSE_SERVER_PORT", None),
# LLMEngine receive requests port, used when FD_ENABLE_INTERNAL_ADAPTER=1
"FD_ZMQ_RECV_REQUEST_SERVER_PORTS": lambda: os.getenv("FD_ZMQ_RECV_REQUEST_SERVER_PORTS", None),
# LLMEngine send response port, used when FD_ENABLE_INTERNAL_ADAPTER=1
"FD_ZMQ_SEND_RESPONSE_SERVER_PORTS": lambda: os.getenv("FD_ZMQ_SEND_RESPONSE_SERVER_PORTS", None),
# LLMEngine receive control command port, used when FD_ENABLE_INTERNAL_ADAPTER=1
"FD_ZMQ_CONTROL_CMD_SERVER_PORTS": lambda: os.getenv("FD_ZMQ_CONTROL_CMD_SERVER_PORTS", "8202"),
# Whether to enable the decode caches requests for preallocating resource
"FD_ENABLE_CACHE_TASK": lambda: os.getenv("FD_ENABLE_CACHE_TASK", "0"),
# Batched token timeout in EP
"FD_EP_BATCHED_TOKEN_TIMEOUT": lambda: float(os.getenv("FD_EP_BATCHED_TOKEN_TIMEOUT", "0.1")),
# Max pre-fetch requests number in PD
"FD_EP_MAX_PREFETCH_TASK_NUM": lambda: int(os.getenv("FD_EP_MAX_PREFETCH_TASK_NUM", "8")),
# Enable or disable model caching.
# When enabled, the quantized model is stored as a cache for future inference to improve loading efficiency.
"FD_ENABLE_MODEL_LOAD_CACHE": lambda: bool(int(os.getenv("FD_ENABLE_MODEL_LOAD_CACHE", "0"))),
# Whether to clear cpu cache when clearing model weights.
"FD_ENABLE_SWAP_SPACE_CLEARING": lambda: int(os.getenv("FD_ENABLE_SWAP_SPACE_CLEARING", "0")),
# enable return text, used when FD_ENABLE_INTERNAL_ADAPTER=1
"FD_ENABLE_RETURN_TEXT": lambda: bool(int(os.getenv("FD_ENABLE_RETURN_TEXT", "0"))),
# Used to truncate the string inserted during thinking when reasoning in a model. (</think> for ernie-45-vl, \n</think>\n\n for ernie-x1)
"FD_LIMIT_THINKING_CONTENT_TRUNCATE_STR": lambda: os.getenv("FD_LIMIT_THINKING_CONTENT_TRUNCATE_STR", "</think>"),
# Timeout for cache_transfer_manager process exit
"FD_CACHE_PROC_EXIT_TIMEOUT": lambda: int(os.getenv("FD_CACHE_PROC_EXIT_TIMEOUT", "600")),
# FP4 dense GEMM backend, could be flashinfer-cutlass, flashinfer-trtllm, flashinfer-cudnn or None (default is None)
"FD_NVFP4_GEMM_BACKEND": lambda: os.getenv("FD_NVFP4_MOE_BACKEND", None),
# Count for cache_transfer_manager process error
"FD_CACHE_PROC_ERROR_COUNT": lambda: int(os.getenv("FD_CACHE_PROC_ERROR_COUNT", "10")),
# API_KEY required for service authentication
"FD_API_KEY": lambda: [] if "FD_API_KEY" not in os.environ else os.environ["FD_API_KEY"].split(","),
# The AK of bos storing the features while multi_modal infer
"ENCODE_FEATURE_BOS_AK": lambda: os.getenv("ENCODE_FEATURE_BOS_AK"),
# The SK of bos storing the features while multi_modal infer
"ENCODE_FEATURE_BOS_SK": lambda: os.getenv("ENCODE_FEATURE_BOS_SK"),
# The ENDPOINT of bos storing the features while multi_modal infer
"ENCODE_FEATURE_ENDPOINT": lambda: os.getenv("ENCODE_FEATURE_ENDPOINT"),
# Whether the Prefill instance continuously requests Decode resources in PD disaggregation
"PREFILL_CONTINUOUS_REQUEST_DECODE_RESOURCES": lambda: int(
os.getenv("PREFILL_CONTINUOUS_REQUEST_DECODE_RESOURCES", "1")
),
"FD_ENABLE_E2W_TENSOR_CONVERT": lambda: int(os.getenv("FD_ENABLE_E2W_TENSOR_CONVERT", "0")),
"FD_ENGINE_TASK_QUEUE_WITH_SHM": lambda: int(os.getenv("FD_ENGINE_TASK_QUEUE_WITH_SHM", "0")),
"FD_FILL_BITMASK_BATCH": lambda: int(os.getenv("FD_FILL_BITMASK_BATCH", "4")),
"FD_ENABLE_PDL": lambda: int(os.getenv("FD_ENABLE_PDL", "1")),
"FD_ENABLE_ASYNC_LLM": lambda: int(os.getenv("FD_ENABLE_ASYNC_LLM", "0")),
# Enable early RDMA connection for PD disaggregation
"FD_ENABLE_PD_RDMA_EAGER_CONNECT": lambda: bool(int(os.getenv("FD_ENABLE_PD_RDMA_EAGER_CONNECT", "0"))),
"FD_GUIDANCE_DISABLE_ADDITIONAL": lambda: bool(int(os.getenv("FD_GUIDANCE_DISABLE_ADDITIONAL", "1"))),
"FD_LLGUIDANCE_LOG_LEVEL": lambda: int(os.getenv("FD_LLGUIDANCE_LOG_LEVEL", "0")),
# "Number of tokens in the group for Mixture of Experts (MoE) computation processing on HPU"
"FD_HPU_CHUNK_SIZE": lambda: int(os.getenv("FD_HPU_CHUNK_SIZE", "64")),
# "Enable FP8 calibration on HPU"
"FD_HPU_MEASUREMENT_MODE": lambda: os.getenv("FD_HPU_MEASUREMENT_MODE", "0"),
"FD_PREFILL_WAIT_DECODE_RESOURCE_SECONDS": lambda: int(os.getenv("FD_PREFILL_WAIT_DECODE_RESOURCE_SECONDS", "30")),
"FD_ENABLE_REQUEST_DISCONNECT_STOP_INFERENCE": lambda: int(
os.getenv("FD_ENABLE_REQUEST_DISCONNECT_STOP_INFERENCE", "1")
),
# Whether to collect user information
"DO_NOT_TRACK": lambda: (os.getenv("DO_NOT_TRACK", "0")) == "1",
# Usage stats server url
"FD_USAGE_STATS_SERVER": lambda: os.getenv(
"FD_USAGE_STATS_SERVER", "http://10.169.17.184:8089/fd/report/periodic"
),
# Usage stats source
"FD_USAGE_SOURCE": lambda: os.getenv("FD_USAGE_SOURCE", "Unknown"),
# Usage stats config root
"FD_CONFIG_ROOT": lambda: os.path.expanduser(
os.getenv("FD_CONFIG_ROOT", os.path.join(os.path.expanduser("~"), ".config", "fastdeploy"))
),
"FMQ_CONFIG_JSON": lambda: os.getenv("FMQ_CONFIG_JSON", None),
"FD_OTLP_EXPORTER_SCHEDULE_DELAY_MILLIS": lambda: int(os.getenv("FD_OTLP_EXPORTER_SCHEDULE_DELAY_MILLIS", "500")),
"FD_OTLP_EXPORTER_MAX_EXPORT_BATCH_SIZE": lambda: int(os.getenv("FD_OTLP_EXPORTER_MAX_EXPORT_BATCH_SIZE", "64")),
"FD_TOKEN_PROCESSOR_HEALTH_TIMEOUT": lambda: float(os.getenv("FD_TOKEN_PROCESSOR_HEALTH_TIMEOUT", "120")),
"FD_XPU_MOE_FFN_QUANT_TYPE_MAP": lambda: os.getenv("FD_XPU_MOE_FFN_QUANT_TYPE_MAP", ""),
# Whether to enable low latency in mixed scenario
"FD_XPU_ENABLE_MIXED_EP_MODE": lambda: bool(int(os.getenv("FD_XPU_ENABLE_MIXED_EP_MODE", "0"))),
# Whether to use phi FP8 quantization,if 1,use paddle default.
"FD_USE_PHI_FP8_QUANT": lambda: bool(int(os.getenv("FD_USE_PHI_FP8_QUANT", "1"))),
# Enables the Paddle/phi combined TopK operator only when topk_method == noaux_tc,
# intended for training alignment. Defaults to 0 (disabled).
"FD_USE_PHI_MOE_TOPK": lambda: bool(int(os.getenv("FD_USE_PHI_MOE_TOPK", "0"))),
# Whether to use phi MOE permute,if 1,use paddle op.
"FD_USE_PHI_MOE_PERMUTE": lambda: bool(int(os.getenv("FD_USE_PHI_MOE_PERMUTE", "0"))),
# Control class SiluAndMul to use swiglu or fusid_bias_act operator in the forward_cuda function
"FD_SiluAndMul_USE_PHI_SWIGLU": lambda: bool(int(os.getenv("FD_SiluAndMul_USE_PHI_SWIGLU", "0"))),
# Reserve output blocks for decoding requests when schedule new prefill requests
"FD_RESERVE_OUTPUT_BLOCK_NUM_FOR_DECODE_WHEN_SCHEDULE_NEW_PREFILL": lambda: int(
os.getenv("FD_RESERVE_OUTPUT_BLOCK_NUM_FOR_DECODE_WHEN_SCHEDULE_NEW_PREFILL", "16")
),
"FD_RESERVE_DECAY_OUTPUT_BLOCK_NUM_FOR_DECODE_WHEN_SCHEDULE_NEW_PREFILL": lambda: float(
os.getenv("FD_RESERVE_DECAY_OUTPUT_BLOCK_NUM_FOR_DECODE_WHEN_SCHEDULE_NEW_PREFILL", "0.025")
),
"FD_RESERVE_MIN_OUTPUT_BLOCK_NUM_FOR_DECODE_WHEN_SCHEDULE_NEW_PREFILL": lambda: int(
os.getenv("FD_RESERVE_MIN_OUTPUT_BLOCK_NUM_FOR_DECODE_WHEN_SCHEDULE_NEW_PREFILL", "0")
),
# Timeout for worker process health check in seconds
"FD_WORKER_ALIVE_TIMEOUT": lambda: int(os.getenv("FD_WORKER_ALIVE_TIMEOUT", "30")),
# File path for file storage backend
"FILE_BACKEND_STORAGE_DIR": lambda: str(os.getenv("FILE_BACKEND_STORAGE_DIR", "/tmp/fastdeploy")),
# Custom all-reduce max buffer size in MB (default 8MB).
# Increase this to avoid NCCL fallback for large tensors in deterministic mode.
# E.g. FD_CUSTOM_AR_MAX_SIZE_MB=128 for 128MB.
"FD_CUSTOM_AR_MAX_SIZE_MB": lambda: int(os.getenv("FD_CUSTOM_AR_MAX_SIZE_MB", "8")),
# Enable deterministic inference mode for chunked prefill alignment
"FD_DETERMINISTIC_MODE": lambda: bool(int(os.getenv("FD_DETERMINISTIC_MODE", "0"))),
# Split KV block size for deterministic alignment (must be power of 2 and > 0, default 16)
"FD_DETERMINISTIC_SPLIT_KV_SIZE": lambda: _validate_split_kv_size(
int(os.getenv("FD_DETERMINISTIC_SPLIT_KV_SIZE", "16"))
),
# Enable determinism logging (print MD5 hashes and debug info)
"FD_DETERMINISTIC_LOG_MODE": lambda: bool(int(os.getenv("FD_DETERMINISTIC_LOG_MODE", "0"))),
# Whether to use PD REORDER, can set 0 or 1
"FD_PD_REORDER": lambda: int(os.getenv("FD_PD_REORDER", "0")),
# Whether to enable KV cache lock, enforcing mutual exclusion between
# PrefixCacheManager and Worker when accessing GPU KV cache.
# Under certain DP+EP configurations, concurrent access (even read-only)
# has been observed to cause NaN computation errors.
# Set to 1 to enable the lock; defaults to 0 (disabled).
"FD_USE_KVCACHE_LOCK": lambda: bool(int(os.getenv("FD_USE_KVCACHE_LOCK", "0"))),
# Whether to probe MoE routing probabilities and use Fleet's fused SwiGLU kernel.
"FD_MOE_PROB_IN_ADVANCE": lambda: bool(int(os.getenv("FD_MOE_PROB_IN_ADVANCE", "0"))),
# Whether to use batch send data in zmq
"ZMQ_SEND_BATCH_DATA": lambda: int(os.getenv("ZMQ_SEND_BATCH_DATA", "1")),
# Whether to enable v1 weight updating, which utilizes ZMQ/EngineWorkerQueue/EngineCacheQueue/FMQs
# to pass control requests and responses.
# When v1 is enabled, the legacy /clear_load_weight and /update_model_weight
# will adopt this new communication pattern.
"FD_ENABLE_V1_UPDATE_WEIGHTS": lambda: bool(int(os.getenv("FD_ENABLE_V1_UPDATE_WEIGHTS", "0"))),
}
def get_unique_name(self, name):
"""
Get unique name for config
"""
shm_uuid = os.getenv("SHM_UUID", "")
return name + f"_{shm_uuid}"
class _EnvsModule(ModuleType):
"""Custom module class to support __setattr__ for environment variables."""
def __getattr__(self, name: str):
if name in environment_variables:
return environment_variables[name]()
raise AttributeError(f"module {__name__!r} has no attribute {name!r}")
def __setattr__(self, name: str, value: Any):
if name in environment_variables:
# Convert bool to "1"/"0" so int(os.getenv(...)) works correctly
if isinstance(value, bool):
value = int(value)
os.environ[name] = str(value)
elif name.startswith("_"):
# Allow Python-internal attrs (__spec__, __loader__, etc.)
super().__setattr__(name, value)
else:
raise AttributeError(f"module {__name__!r} has no attribute {name!r}")
def __delattr__(self, name: str):
# Support unittest.mock.patch cleanup which calls delattr to restore original state
if name in environment_variables:
os.environ.pop(name, None)
elif name.startswith("_"):
super().__delattr__(name)
else:
raise AttributeError(f"module {__name__!r} has no attribute {name!r}")
def __dir__(self):
return list(environment_variables.keys())
# Replace the module with our custom class
_current_module = sys.modules[__name__]
_current_module.__class__ = _EnvsModule