get_required_header() — anthropic-sdk-python Function Reference

Architecture documentation for the get_required_header() function in _utils.py from the anthropic-sdk-python codebase.

Function python AnthropicClient AsyncAPI calls 1

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AnthropicClient→ AsyncAPI→ get_required_header() — anthropic-sdk-python Function Reference

Dependency Diagram

graph TD
  d16eb43f_13fb_1826_ada5_f06d07a647ec["get_required_header()"]
  875202ec_3744_577d_9ec4_ed9fbc6aaf41["_utils.py"]
  d16eb43f_13fb_1826_ada5_f06d07a647ec -->|defined in| 875202ec_3744_577d_9ec4_ed9fbc6aaf41
  2566fa30_a0b2_d15a_1637_ea0e212c7daa["is_mapping_t()"]
  d16eb43f_13fb_1826_ada5_f06d07a647ec -->|calls| 2566fa30_a0b2_d15a_1637_ea0e212c7daa
  style d16eb43f_13fb_1826_ada5_f06d07a647ec fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

src/anthropic/_utils/_utils.py lines 372–388

def get_required_header(headers: HeadersLike, header: str) -> str:
    lower_header = header.lower()
    if is_mapping_t(headers):
        # mypy doesn't understand the type narrowing here
        for k, v in headers.items():  # type: ignore
            if k.lower() == lower_header and isinstance(v, str):
                return v

    # to deal with the case where the header looks like Stainless-Event-Id
    intercaps_header = re.sub(r"([^\w])(\w)", lambda pat: pat.group(1) + pat.group(2).upper(), header.capitalize())

    for normalized_header in [header, lower_header, header.upper(), intercaps_header]:
        value = headers.get(normalized_header)
        if value:
            return value

    raise ValueError(f"Could not find {header} header")