Refactored `input` (#8202)

Refactored `input.py`. The same as
https://github.com/langchain-ai/langchain/pull/7961 #8098 #8099
input.py is in the root code folder. This creates the `langchain.input:
Input` group on the API Reference navigation ToC, on the same level as
Chains and Agents which is incorrect.

Refactoring:

- copied input.py file into utils/input.py
- I added the backwards compatibility ref in the original input.py. 
- changed several imports to a new ref

@hwchase17, @baskaryan

libs/langchain/langchain/agents/agent.py

@@ -25,7 +25,6 @@ from langchain.callbacks.manager import (
 )
 from langchain.chains.base import Chain
 from langchain.chains.llm import LLMChain
-from langchain.input import get_color_mapping
 from langchain.prompts.few_shot import FewShotPromptTemplate
 from langchain.prompts.prompt import PromptTemplate
 from langchain.schema import (
@@ -39,6 +38,7 @@ from langchain.schema.language_model import BaseLanguageModel
 from langchain.schema.messages import BaseMessage
 from langchain.tools.base import BaseTool
 from langchain.utilities.asyncio import asyncio_timeout
+from langchain.utils.input import get_color_mapping
 
 logger = logging.getLogger(__name__)
 

libs/langchain/langchain/agents/agent_iterator.py

@@ -25,11 +25,11 @@ from langchain.callbacks.manager import (
     CallbackManagerForChainRun,
     Callbacks,
 )
-from langchain.input import get_color_mapping
 from langchain.load.dump import dumpd
 from langchain.schema import RUN_KEY, AgentAction, AgentFinish, RunInfo
 from langchain.tools import BaseTool
 from langchain.utilities.asyncio import asyncio_timeout
+from langchain.utils.input import get_color_mapping
 
 if TYPE_CHECKING:
     from langchain.agents.agent import AgentExecutor

libs/langchain/langchain/callbacks/file.py

@@ -2,8 +2,8 @@
 from typing import Any, Dict, Optional, TextIO, cast
 
 from langchain.callbacks.base import BaseCallbackHandler
-from langchain.input import print_text
 from langchain.schema import AgentAction, AgentFinish
+from langchain.utils.input import print_text
 
 
 class FileCallbackHandler(BaseCallbackHandler):

libs/langchain/langchain/callbacks/stdout.py

@@ -2,8 +2,8 @@
 from typing import Any, Dict, List, Optional, Union
 
 from langchain.callbacks.base import BaseCallbackHandler
-from langchain.input import print_text
 from langchain.schema import AgentAction, AgentFinish, LLMResult
+from langchain.utils.input import print_text
 
 
 class StdOutCallbackHandler(BaseCallbackHandler):

libs/langchain/langchain/callbacks/tracers/stdout.py

@@ -3,7 +3,7 @@ from typing import Any, Callable, List
 
 from langchain.callbacks.tracers.base import BaseTracer
 from langchain.callbacks.tracers.schemas import Run
-from langchain.input import get_bolded_text, get_colored_text
+from langchain.utils.input import get_bolded_text, get_colored_text
 
 
 def try_json_stringify(obj: Any, fallback: str) -> str:

libs/langchain/langchain/chains/llm.py

@@ -14,7 +14,6 @@ from langchain.callbacks.manager import (
     Callbacks,
 )
 from langchain.chains.base import Chain
-from langchain.input import get_colored_text
 from langchain.load.dump import dumpd
 from langchain.prompts.prompt import PromptTemplate
 from langchain.schema import (
@@ -25,6 +24,7 @@ from langchain.schema import (
     PromptValue,
 )
 from langchain.schema.language_model import BaseLanguageModel
+from langchain.utils.input import get_colored_text
 
 
 class LLMChain(Chain):

libs/langchain/langchain/chains/openai_functions/openapi.py

@@ -12,13 +12,13 @@ from langchain.callbacks.manager import CallbackManagerForChainRun
 from langchain.chains.base import Chain
 from langchain.chains.sequential import SequentialChain
 from langchain.chat_models import ChatOpenAI
-from langchain.input import get_colored_text
 from langchain.output_parsers.openai_functions import JsonOutputFunctionsParser
 from langchain.prompts import ChatPromptTemplate
 from langchain.schema import BasePromptTemplate
 from langchain.schema.language_model import BaseLanguageModel
 from langchain.tools import APIOperation
 from langchain.utilities.openapi import OpenAPISpec
+from langchain.utils.input import get_colored_text
 
 
 def _get_description(o: Any, prefer_short: bool) -> Optional[str]:

libs/langchain/langchain/chains/sequential.py

@@ -8,7 +8,7 @@ from langchain.callbacks.manager import (
     CallbackManagerForChainRun,
 )
 from langchain.chains.base import Chain
-from langchain.input import get_color_mapping
+from langchain.utils.input import get_color_mapping
 
 
 class SequentialChain(Chain):

libs/langchain/langchain/input.py

@@ -1,42 +1,14 @@
-"""Handle chained inputs."""
-from typing import Dict, List, Optional, TextIO
-
-_TEXT_COLOR_MAPPING = {
-    "blue": "36;1",
-    "yellow": "33;1",
-    "pink": "38;5;200",
-    "green": "32;1",
-    "red": "31;1",
-}
-
-
-def get_color_mapping(
-    items: List[str], excluded_colors: Optional[List] = None
-) -> Dict[str, str]:
-    """Get mapping for items to a support color."""
-    colors = list(_TEXT_COLOR_MAPPING.keys())
-    if excluded_colors is not None:
-        colors = [c for c in colors if c not in excluded_colors]
-    color_mapping = {item: colors[i % len(colors)] for i, item in enumerate(items)}
-    return color_mapping
-
-
-def get_colored_text(text: str, color: str) -> str:
-    """Get colored text."""
-    color_str = _TEXT_COLOR_MAPPING[color]
-    return f"\u001b[{color_str}m\033[1;3m{text}\u001b[0m"
-
-
-def get_bolded_text(text: str) -> str:
-    """Get bolded text."""
-    return f"\033[1m{text}\033[0m"
-
-
-def print_text(
-    text: str, color: Optional[str] = None, end: str = "", file: Optional[TextIO] = None
-) -> None:
-    """Print text with highlighting and no end characters."""
-    text_to_print = get_colored_text(text, color) if color else text
-    print(text_to_print, end=end, file=file)
-    if file:
-        file.flush()  # ensure all printed content are written to file
+"""DEPRECATED: Kept for backwards compatibility."""
+from langchain.utils.input import (
+    get_bolded_text,
+    get_color_mapping,
+    get_colored_text,
+    print_text,
+)
+
+__all__ = [
+    "get_bolded_text",
+    "get_color_mapping",
+    "get_colored_text",
+    "print_text",
+]

libs/langchain/langchain/model_laboratory.py

@@ -5,9 +5,9 @@ from typing import List, Optional, Sequence
 
 from langchain.chains.base import Chain
 from langchain.chains.llm import LLMChain
-from langchain.input import get_color_mapping, print_text
 from langchain.llms.base import BaseLLM
 from langchain.prompts.prompt import PromptTemplate
+from langchain.utils.input import get_color_mapping, print_text
 
 
 class ModelLaboratory:

libs/langchain/langchain/utils/__init__.py

@@ -6,6 +6,12 @@ These functions do not depend on any other langchain modules.
 
 from langchain.utils.env import get_from_dict_or_env, get_from_env
 from langchain.utils.formatting import StrictFormatter, formatter
+from langchain.utils.input import (
+    get_bolded_text,
+    get_color_mapping,
+    get_colored_text,
+    print_text,
+)
 from langchain.utils.math import cosine_similarity, cosine_similarity_top_k
 from langchain.utils.strings import comma_list, stringify_dict, stringify_value
 from langchain.utils.utils import (
@@ -24,11 +30,15 @@ __all__ = [
     "cosine_similarity",
     "cosine_similarity_top_k",
     "formatter",
+    "get_bolded_text",
+    "get_color_mapping",
+    "get_colored_text",
     "get_from_dict_or_env",
     "get_from_env",
     "get_pydantic_field_names",
     "guard_import",
     "mock_now",
+    "print_text",
     "raise_for_status_with_text",
     "stringify_dict",
     "stringify_value",

libs/langchain/langchain/utils/input.py

@@ -0,0 +1,42 @@
+"""Handle chained inputs."""
+from typing import Dict, List, Optional, TextIO
+
+_TEXT_COLOR_MAPPING = {
+    "blue": "36;1",
+    "yellow": "33;1",
+    "pink": "38;5;200",
+    "green": "32;1",
+    "red": "31;1",
+}
+
+
+def get_color_mapping(
+    items: List[str], excluded_colors: Optional[List] = None
+) -> Dict[str, str]:
+    """Get mapping for items to a support color."""
+    colors = list(_TEXT_COLOR_MAPPING.keys())
+    if excluded_colors is not None:
+        colors = [c for c in colors if c not in excluded_colors]
+    color_mapping = {item: colors[i % len(colors)] for i, item in enumerate(items)}
+    return color_mapping
+
+
+def get_colored_text(text: str, color: str) -> str:
+    """Get colored text."""
+    color_str = _TEXT_COLOR_MAPPING[color]
+    return f"\u001b[{color_str}m\033[1;3m{text}\u001b[0m"
+
+
+def get_bolded_text(text: str) -> str:
+    """Get bolded text."""
+    return f"\033[1m{text}\033[0m"
+
+
+def print_text(
+    text: str, color: Optional[str] = None, end: str = "", file: Optional[TextIO] = None
+) -> None:
+    """Print text with highlighting and no end characters."""
+    text_to_print = get_colored_text(text, color) if color else text
+    print(text_to_print, end=end, file=file)
+    if file:
+        file.flush()  # ensure all printed content are written to file