Method __init__

pandas/core/series.py:369–519

(
        self,
        data=None,
        index=None,
        dtype: Dtype | None = None,
        name=None,
        copy: bool | None = None,
    )

    # Constructors

    def __init__(
        self,
        data=None,
        index=None,
        dtype: Dtype | None = None,
        name=None,
        copy: bool | None = None,
    ) -> None:
        allow_mgr = False
        if (
            isinstance(data, SingleBlockManager)
            and index is None
            and dtype is None
            and (copy is False or copy is None)
        ):
            if not allow_mgr:
                # GH#52419
                warnings.warn(
                    f"Passing a {type(data).__name__} to {type(self).__name__} "
                    "is deprecated and will raise in a future version. "
                    "Use public APIs instead.",
                    Pandas4Warning,
                    stacklevel=2,
                )
            data = data.copy(deep=False)
            # GH#33357 called with just the SingleBlockManager
            NDFrame.__init__(self, data)
            self.name = name
            return

        if isinstance(data, (ExtensionArray, np.ndarray)):
            if copy is not False:
                if dtype is None or astype_is_view(data.dtype, pandas_dtype(dtype)):
                    data = data.copy()
                    copy = False
        if copy is None:
            copy = False

        if isinstance(data, SingleBlockManager) and not copy:
            data = data.copy(deep=False)

            if not allow_mgr:
                warnings.warn(
                    f"Passing a {type(data).__name__} to {type(self).__name__} "
                    "is deprecated and will raise in a future version. "
                    "Use public APIs instead.",
                    Pandas4Warning,
                    stacklevel=2,
                )
                allow_mgr = True

        name = ibase.maybe_extract_name(name, data, type(self))

        if index is not None:
            index = ensure_index(index)

        if dtype is not None:
            dtype = self._validate_dtype(dtype)