feat: support partial writes

README.md

@@ -205,6 +205,51 @@ client.write_dataframe(
 )
 ```
 
+### Accept partial writes and inspect failed lines
+`accept_partial` defaults to `True` and allows partial success when a batch contains invalid lines.
+On partial failure, the client raises `InfluxDBPartialWriteError` with structured `line_errors`.
+
+```python
+from influxdb_client_3 import InfluxDBClient3
+from influxdb_client_3.exceptions import InfluxDBPartialWriteError
+
+client = InfluxDBClient3(host="http://localhost:8181", token="token", database="db")
+lp = "m v=1i 1\nm v=1.2 2"
+
+try:
+    client.write(lp)  # accept_partial=True by default
+except InfluxDBPartialWriteError as e:
+    for line_err in e.line_errors:
+        print(f"line {line_err.line_number} failed: {line_err.error_message} ({line_err.original_line})")
+```
+
+Disable partial writes:
+```python
+from influxdb_client_3 import WriteOptions, write_client_options
+
+client = InfluxDBClient3(
+    host="http://localhost:8181",
+    token="token",
+    database="db",
+    write_client_options=write_client_options(
+        write_options=WriteOptions(accept_partial=False)
+    ),
+)
+```
+
+### V2 compatibility mode (Clustered)
+Set `use_v2_api=True` to route writes through `/api/v2/write` for Clustered/v2-compatible backends.
+
+`use_v2_api` can be configured by:
+- `WriteOptions(use_v2_api=True)`
+- constructor kwarg: `write_use_v2_api=True`
+- env var: `INFLUX_WRITE_USE_V2_API=true`
+
+When `use_v2_api=True`:
+- `accept_partial` is ignored by the backend
+- `no_sync=True` is invalid and rejected before dispatch with:
+  `invalid write options: no_sync cannot be used with use_v2_api`
+
 ## Querying
 
 ### Querying with SQL

influxdb_client_3/__init__.py

@@ -29,6 +29,8 @@
 INFLUX_AUTH_SCHEME = "INFLUX_AUTH_SCHEME"
 INFLUX_GZIP_THRESHOLD = "INFLUX_GZIP_THRESHOLD"
 INFLUX_WRITE_NO_SYNC = "INFLUX_WRITE_NO_SYNC"
+INFLUX_WRITE_ACCEPT_PARTIAL = "INFLUX_WRITE_ACCEPT_PARTIAL"
+INFLUX_WRITE_USE_V2_API = "INFLUX_WRITE_USE_V2_API"
 INFLUX_WRITE_TIMEOUT = "INFLUX_WRITE_TIMEOUT"
 INFLUX_QUERY_TIMEOUT = "INFLUX_QUERY_TIMEOUT"
 INFLUX_DISABLE_GRPC_COMPRESSION = "INFLUX_DISABLE_GRPC_COMPRESSION"
@@ -155,19 +157,23 @@ def _parse_gzip_threshold(threshold: str) -> int:
     return threshold
 
 
-def _parse_write_no_sync(write_no_sync: str):
+def _parse_write_bool(value):
     """
-    Parses and validates the provided write no sync value.
+    Parses a truthy/falsy value for write options.
 
-    This function ensures that the given value is a valid boolean,
-    and it raises an appropriate error if the value is not valid.
+    The input is normalized to string and matched against common truthy values.
+    Any non-truthy value is treated as False.
 
-    :param write_no_sync: The input value to be parsed and validated.
-    :type write_no_sync: Any
-    :return: The validated write no sync value as an boolean.
+    :param value: The input value to be parsed and validated.
+    :type value: Any
+    :return: Parsed boolean value.
     :rtype: bool
     """
-    return write_no_sync.strip().lower() in ['true', '1', 't', 'y', 'yes']
+    return str(value).strip().lower() in ['true', '1', 't', 'y', 'yes']
+
+
+def _parse_write_no_sync(write_no_sync: str):
+    return _parse_write_bool(write_no_sync)
 
 
 def _parse_timeout(to: str) -> int:
@@ -233,6 +239,8 @@ def __init__(
         :key str password: ``password`` to authenticate via username and password credentials to the InfluxDB 2.x
         :key str query_timeout: int value used to set the client query API timeout in milliseconds.
         :key str write_timeout: int value used to set the client write API timeout in milliseconds.
+        :key bool write_accept_partial: allow partial writes when some lines fail.
+        :key bool write_use_v2_api: route writes through /api/v2/write compatibility endpoint.
         :key list[str] profilers: list of enabled Flux profilers
         """
         self._org = org if org is not None else "default"
@@ -243,22 +251,34 @@ def __init__(
         write_type = DefaultWriteOptions.write_type.value
         write_precision = DefaultWriteOptions.write_precision.value
         write_no_sync = DefaultWriteOptions.no_sync.value
+        write_accept_partial = DefaultWriteOptions.accept_partial.value
+        write_use_v2_api = DefaultWriteOptions.use_v2_api.value
         write_timeout = DefaultWriteOptions.timeout.value
 
         if isinstance(write_client_options, dict) and write_client_options.get('write_options') is not None:
             write_opts = write_client_options['write_options']
             write_type = getattr(write_opts, 'write_type', write_type)
             write_precision = getattr(write_opts, 'write_precision', write_precision)
             write_no_sync = getattr(write_opts, 'no_sync', write_no_sync)
+            write_accept_partial = getattr(write_opts, 'accept_partial', write_accept_partial)
+            write_use_v2_api = getattr(write_opts, 'use_v2_api', write_use_v2_api)
             write_timeout = getattr(write_opts, 'timeout', write_timeout)
 
         if kw_keys.__contains__('write_timeout'):
             write_timeout = kwargs.get('write_timeout')
 
+        if kw_keys.__contains__('write_accept_partial'):
+            write_accept_partial = _parse_write_bool(kwargs.get('write_accept_partial'))
+
+        if kw_keys.__contains__('write_use_v2_api'):
+            write_use_v2_api = _parse_write_bool(kwargs.get('write_use_v2_api'))
+
         write_options = WriteOptions(
             write_type=write_type,
             write_precision=write_precision,
             no_sync=write_no_sync,
+            accept_partial=write_accept_partial,
+            use_v2_api=write_use_v2_api,
         )
 
         self._write_client_options = {
@@ -347,7 +367,15 @@ def from_env(cls, **kwargs: Any) -> 'InfluxDBClient3':
 
         write_no_sync = os.getenv(INFLUX_WRITE_NO_SYNC)
         if write_no_sync is not None:
-            write_options.no_sync = _parse_write_no_sync(write_no_sync)
+            write_options.no_sync = _parse_write_bool(write_no_sync)
+
+        write_accept_partial = os.getenv(INFLUX_WRITE_ACCEPT_PARTIAL)
+        if write_accept_partial is not None:
+            write_options.accept_partial = _parse_write_bool(write_accept_partial)
+
+        write_use_v2_api = os.getenv(INFLUX_WRITE_USE_V2_API)
+        if write_use_v2_api is not None:
+            write_options.use_v2_api = _parse_write_bool(write_use_v2_api)
 
         precision = os.getenv(INFLUX_PRECISION)
         if precision is not None:
@@ -402,10 +430,7 @@ def write(self, record=None, database=None, **kwargs):
         if database is None:
             database = self._database
 
-        try:
-            return self._write_api.write(bucket=database, record=record, **kwargs)
-        except InfluxDBError as e:
-            raise e
+        return self._write_api.write(bucket=database, record=record, **kwargs)
 
     def write_dataframe(
         self,

influxdb_client_3/exceptions/__init__.py

@@ -1,3 +1,4 @@
 # flake8: noqa
 
-from .exceptions import InfluxDB3ClientQueryError, InfluxDBError, InfluxDB3ClientError
+from .exceptions import InfluxDB3ClientQueryError, InfluxDBError, InfluxDB3ClientError, InfluxDBPartialWriteError, \
+    InfluxDBPartialWriteLineError

influxdb_client_3/exceptions/exceptions.py

@@ -1,6 +1,9 @@
 """Exceptions utils for InfluxDB."""
 
+import json
 import logging
+from dataclasses import dataclass
+from typing import List, Optional, Tuple
 
 from urllib3 import HTTPResponse
 
@@ -39,6 +42,104 @@ def __init__(self, error_message, *args, **kwargs):
         self.message = error_message
 
 
+def _is_partial_write_error(error_message) -> bool:
+    if not isinstance(error_message, str) or not error_message:
+        return False
+    normalized = error_message.lower()
+    return (
+        "partial write of line protocol occurred" in normalized or
+        "parsing failed for write_lp endpoint" in normalized
+    )
+
+
+def _parse_partial_write_data_item(item) -> Optional[Tuple[str, int, str]]:
+    if item is None:
+        return None
+    if not isinstance(item, dict):
+        raise ValueError("array item is not an object")
+
+    error_message = item.get("error_message")
+    if not isinstance(error_message, str):
+        raise ValueError("error_message must be string")
+    if not error_message:
+        return None
+
+    line_number_raw = item.get("line_number")
+    if line_number_raw is None:
+        line_number = 0
+    elif isinstance(line_number_raw, int):
+        line_number = line_number_raw
+    else:
+        raise ValueError("line_number must be int")
+
+    original_line_raw = item.get("original_line")
+    if original_line_raw is None:
+        original_line = ""
+    elif isinstance(original_line_raw, str):
+        original_line = original_line_raw
+    else:
+        raise ValueError("original_line must be string")
+
+    return error_message, line_number, original_line
+
+
+def _parse_typed_partial_write_array(data) -> Optional[List[Tuple[str, int, str]]]:
+    if not isinstance(data, list):
+        return None
+    line_errors: List[Tuple[str, int, str]] = []
+    try:
+        for item in data:
+            parsed = _parse_partial_write_data_item(item)
+            if parsed is None:
+                continue
+            line_errors.append(parsed)
+    except ValueError:
+        return None
+    return line_errors if len(line_errors) > 0 else None
+
+
+def _parse_typed_partial_write_object_or_none(data) -> Optional[Tuple[str, int, str]]:
+    try:
+        return _parse_partial_write_data_item(data)
+    except ValueError:
+        return None
+
+
+def _format_partial_write_details(line_errors: List[Tuple[str, int, str]]) -> List[str]:
+    details: List[str] = []
+    for error_message, line_number, original_line in line_errors:
+        if line_number != 0 and original_line != "":
+            details.append(f"\tline {line_number}: {error_message} ({original_line})")
+        elif error_message:
+            details.append(f"\t{error_message}")
+    return details
+
+
+def _parse_partial_write_line_error_info(data) -> Tuple[List[Tuple[str, int, str]], List[str]]:
+    if data is None:
+        return [], []
+
+    typed_array = _parse_typed_partial_write_array(data)
+    if typed_array is not None:
+        return typed_array, _format_partial_write_details(typed_array)
+
+    if isinstance(data, list):
+        details: List[str] = []
+        for item in data:
+            if item is None:
+                continue
+            raw = json.dumps(item, separators=(',', ':'))
+            if raw and raw.lower() != "null":
+                details.append(raw)
+        return [], details
+
+    typed_single = _parse_typed_partial_write_object_or_none(data)
+    if typed_single is not None:
+        return [typed_single], _format_partial_write_details([typed_single])
+
+    return [], []
+
+
 # This error is for all write operations
 class InfluxDBError(InfluxDB3ClientError):
     """Raised when a server error occurs."""
@@ -56,10 +157,7 @@ def __init__(self, response: HTTPResponse = None, message: str = None):
         super().__init__(self.message)
 
     def _get_message(self, response):
-        # Body
         if response.data:
-            import json
-
             def get(d, key):
                 if not key or d is None:
                     return d
@@ -80,23 +178,15 @@ def get(d, key):
                     #   "data": [ { "error_message": "...", "line_number": 2, "original_line": "..." }, ... ]
                     # }
                     error_text = node.get("error")
-                    data = node.get("data")
-                    if error_text and isinstance(data, list):
-                        details = []
-                        for item in data:
-                            if not isinstance(item, dict):
-                                continue
-                            line_number = item.get("line_number")
-                            error_message = item.get("error_message")
-                            original_line = item.get("original_line")
-                            if line_number is not None and error_message and original_line:
-                                details.append(
-                                    f"\tline {line_number}: {error_message} ({original_line})"
-                                )
-                            elif error_message:
-                                details.append(f"\t{error_message}")
+                    if error_text and _is_partial_write_error(error_text):
+                        _, details = _parse_partial_write_line_error_info(node.get("data"))
                         if details:
-                            return error_text + ":\n" + "\n".join(details)
+                            return error_text + ":\n" + "\n".join(
+                                detail if detail.startswith("\t") else f"\t{detail}"
+                                for detail in details
+                            )
+                        return error_text
+                    if error_text:
                         return error_text
                 for key in [['message'], ['data', 'error_message'], ['error']]:
                     value = get(node, key)
@@ -119,3 +209,44 @@ def get(d, key):
     def getheaders(self):
         """Helper method to make response headers more accessible."""
         return self.response.getheaders()
+
+
+@dataclass(frozen=True)
+class InfluxDBPartialWriteLineError:
+    line_number: int
+    error_message: str
+    original_line: str
+
+
+class InfluxDBPartialWriteError(InfluxDBError):
+    """Structured partial-write error with per-line failures."""
+
+    def __init__(self, response: HTTPResponse, line_errors: List[InfluxDBPartialWriteLineError]):
+        super().__init__(response=response)
+        self.line_errors = line_errors
+
+    @classmethod
+    def from_response(cls, response: HTTPResponse):
+        if response is None or not response.data:
+            return None
+        try:
+            node = json.loads(response.data)
+        except Exception:
+            return None
+        if not isinstance(node, dict):
+            return None
+        error_text = node.get("error")
+        if not _is_partial_write_error(error_text):
+            return None
+        parsed_line_errors, _ = _parse_partial_write_line_error_info(node.get("data"))
+        if not parsed_line_errors:
+            return None
+        line_errors = [
+            InfluxDBPartialWriteLineError(
+                line_number=line_number,
+                error_message=error_message,
+                original_line=original_line,
+            )
+            for error_message, line_number, original_line in parsed_line_errors
+        ]
+        return cls(response=response, line_errors=line_errors)