pandas.read_xml — pandas 2.2.3 documentation (original) (raw)

pandas.read_xml(path_or_buffer, *, xpath='./*', namespaces=None, elems_only=False, attrs_only=False, names=None, dtype=None, converters=None, parse_dates=None, encoding='utf-8', parser='lxml', stylesheet=None, iterparse=None, compression='infer', storage_options=None, dtype_backend=<no_default>)[source]#

Read XML document into a DataFrame object.

Added in version 1.3.0.

Parameters:

path_or_bufferstr, path object, or file-like object

String, path object (implementing os.PathLike[str]), or file-like object implementing a read() function. The string can be any valid XML string or a path. The string can further be a URL. Valid URL schemes include http, ftp, s3, and file.

Deprecated since version 2.1.0: Passing xml literal strings is deprecated. Wrap literal xml input in io.StringIO or io.BytesIO instead.

xpathstr, optional, default ‘./*’

The XPath to parse required set of nodes for migration toDataFrame.``XPath`` should return a collection of elements and not a single element. Note: The etree parser supports limited XPathexpressions. For more complex XPath, use lxml which requires installation.

namespacesdict, optional

The namespaces defined in XML document as dicts with key being namespace prefix and value the URI. There is no need to include all namespaces in XML, only the ones used in xpath expression. Note: if XML document uses default namespace denoted asxmlns=’’ without a prefix, you must assign any temporary namespace prefix such as ‘doc’ to the URI in order to parse underlying nodes and/or attributes. For example,

namespaces = {"doc": "https://example.com"}

elems_onlybool, optional, default False

Parse only the child elements at the specified xpath. By default, all child elements and non-empty text nodes are returned.

attrs_onlybool, optional, default False

Parse only the attributes at the specified xpath. By default, all attributes are returned.

nameslist-like, optional

Column names for DataFrame of parsed XML data. Use this parameter to rename original element names and distinguish same named elements and attributes.

dtypeType name or dict of column -> type, optional

Data type for data or columns. E.g. {‘a’: np.float64, ‘b’: np.int32, ‘c’: ‘Int64’} Use str or object together with suitable na_values settings to preserve and not interpret dtype. If converters are specified, they will be applied INSTEAD of dtype conversion.

Added in version 1.5.0.

convertersdict, optional

Dict of functions for converting values in certain columns. Keys can either be integers or column labels.

Added in version 1.5.0.

parse_datesbool or list of int or names or list of lists or dict, default False

Identifiers to parse index or columns to datetime. The behavior is as follows:

boolean. If True -> try parsing the index.
list of int or names. e.g. If [1, 2, 3] -> try parsing columns 1, 2, 3 each as a separate date column.
list of lists. e.g. If [[1, 3]] -> combine columns 1 and 3 and parse as a single date column.
dict, e.g. {‘foo’ : [1, 3]} -> parse columns 1, 3 as date and call result ‘foo’

Added in version 1.5.0.

encodingstr, optional, default ‘utf-8’

Encoding of XML document.

parser{‘lxml’,’etree’}, default ‘lxml’

Parser module to use for retrieval of data. Only ‘lxml’ and ‘etree’ are supported. With ‘lxml’ more complex XPath searches and ability to use XSLT stylesheet are supported.

stylesheetstr, path object or file-like object

A URL, file-like object, or a raw string containing an XSLT script. This stylesheet should flatten complex, deeply nested XML documents for easier parsing. To use this feature you must have lxml module installed and specify ‘lxml’ as parser. The xpath must reference nodes of transformed XML document generated after XSLT transformation and not the original XML document. Only XSLT 1.0 scripts and not later versions is currently supported.

iterparsedict, optional

The nodes or attributes to retrieve in iterparsing of XML document as a dict with key being the name of repeating element and value being list of elements or attribute names that are descendants of the repeated element. Note: If this option is used, it will replace xpath parsing and unlike xpath, descendants do not need to relate to each other but can exist any where in document under the repeating element. This memory- efficient method should be used for very large XML files (500MB, 1GB, or 5GB+). For example,

iterparse = {"row_element": ["child_elem", "attr", "grandchild_elem"]}

Added in version 1.5.0.

compressionstr or dict, default ‘infer’

For on-the-fly decompression of on-disk data. If ‘infer’ and ‘path_or_buffer’ is path-like, then detect compression from the following extensions: ‘.gz’, ‘.bz2’, ‘.zip’, ‘.xz’, ‘.zst’, ‘.tar’, ‘.tar.gz’, ‘.tar.xz’ or ‘.tar.bz2’ (otherwise no compression). If using ‘zip’ or ‘tar’, the ZIP file must contain only one data file to be read in. Set to None for no decompression. Can also be a dict with key 'method' set to one of {'zip', 'gzip', 'bz2', 'zstd', 'xz', 'tar'} and other key-value pairs are forwarded tozipfile.ZipFile, gzip.GzipFile,bz2.BZ2File, zstandard.ZstdDecompressor, lzma.LZMAFile ortarfile.TarFile, respectively. As an example, the following could be passed for Zstandard decompression using a custom compression dictionary:compression={'method': 'zstd', 'dict_data': my_compression_dict}.

Added in version 1.5.0: Added support for .tar files.

Changed in version 1.4.0: Zstandard support.

storage_optionsdict, optional

Extra options that make sense for a particular storage connection, e.g. host, port, username, password, etc. For HTTP(S) URLs the key-value pairs are forwarded to urllib.request.Request as header options. For other URLs (e.g. starting with “s3://”, and “gcs://”) the key-value pairs are forwarded to fsspec.open. Please see fsspec and urllib for more details, and for more examples on storage options refer here.

dtype_backend{‘numpy_nullable’, ‘pyarrow’}, default ‘numpy_nullable’

Back-end data type applied to the resultant DataFrame(still experimental). Behaviour is as follows:

"numpy_nullable": returns nullable-dtype-backed DataFrame(default).
"pyarrow": returns pyarrow-backed nullable ArrowDtypeDataFrame.

Added in version 2.0.

Returns:

A DataFrame.