Data Readers

The Data class itself will identify then output one of the following Data class types. Using the data reader is easy, just pass it through the Data object.

import dataprofiler as dp
data = dp.Data("your_file.csv")

The supported file types are:

  • CSV file (or any delimited file)

  • JSON object

  • Avro file

  • Parquet file

  • Graph data file

  • Text file

  • Pandas DataFrame

  • A URL that points to one of the supported file types above

It’s also possible to specifically call one of the data classes such as the following command:

from dataprofiler.data_readers.csv_data import CSVData
data = CSVData("your_file.csv", options={"delimiter": ","})

Additionally any of the data classes can be loaded using a URL:

import dataprofiler as dp
data = dp.Data("https://you_website.com/your_file.file", options={"verify_ssl": "True"})

Below are descriptions of the various Data classes and the available options.

CSVData

Data class for loading datasets of type CSV. Can be specified by passing in memory data or via a file path. Options pertaining the CSV may also be specified using the options dict parameter.

CSVData(input_file_path=None, data=None, options=None)

Possible options:

  • delimiter - Must be a string, for example “delimiter”: “,”

  • data_format - Must be a string, possible choices: “dataframe”, “records”

  • selected_columns - Columns being selected from the entire dataset, must be a list [“column 1”, “ssn”]

  • sample_nrows - Reservoir sampling to sample “n” rows out of a total of “M” rows. Specified for how many rows to sample, default None.

  • header - Define the header, for example

    • “header”: ‘auto’ for auto detection

    • “header”: None for no header

    • “header”: <INT> to specify the header row (0 based index)

JSONData

Data class for loading datasets of type JSON. Can be specified by passing in memory data or via a file path. Options pertaining the JSON may also be specified using the options dict parameter. JSON data can be accessed via the “data” property, the “metadata” property, and the “data_and_metadata” property.

JSONData(input_file_path=None, data=None, options=None)

Possible options:

  • data_format - must be a string, choices: “dataframe”, “records”, “json”, “flattened_dataframe”

    • “flattened_dataframe” is best used for JSON structure typically found in data streams that contain nested lists of dictionaries and a payload. For example: {“data”: [ columns ], “response”: 200}

  • selected_keys - columns being selected from the entire dataset, must be a list [“column 1”, “ssn”]

  • payload_keys - The dictionary keys for the payload of the JSON, typically called “data” or “payload”. Defaults to [“data”, “payload”, “response”].

AVROData

Data class for loading datasets of type AVRO. Can be specified by passing in memory data or via a file path. Options pertaining the AVRO may also be specified using the options dict parameter.

AVROData(input_file_path=None, data=None, options=None)

Possible options:

  • data_format - must be a string, choices: “dataframe”, “records”, “avro”, “json”, “flattened_dataframe”

    • “flattened_dataframe” is best used for AVROs with a JSON structure typically found in data streams that contain nested lists of dictionaries and a payload. For example: {“data”: [ columns ], “response”: 200}

  • selected_keys - columns being selected from the entire dataset, must be a list [“column 1”, “ssn”]

ParquetData

Data class for loading datasets of type PARQUET. Can be specified by passing in memory data or via a file path. Options pertaining the PARQUET may also be specified using the options dict parameter.

ParquetData(input_file_path=None, data=None, options=None)

Possible options:

  • data_format - must be a string, choices: “dataframe”, “records”, “json”

  • selected_keys - columns being selected from the entire dataset, must be a list [“column 1”, “ssn”]

GraphData

Data Class for loading datasets of graph data. Currently takes CSV format, further type formats will be supported. Can be specified by passing in memory data (NetworkX Graph) or via a file path. Options pertaining the CSV file may also be specified using the options dict parameter. Loads data from CSV into memory as a NetworkX Graph.

GraphData(input_file_path=None, data=None, options=None)

Possible options:

  • delimiter - must be a string, for example “delimiter”: “,”

  • data_format - must be a string, possible choices: “graph”, “dataframe”, “records”

  • header - Define the header, for example

    • “header”: ‘auto’ for auto detection

    • “header”: None for no header

    • “header”: <INT> to specify the header row (0 based index)

TextData

Data class for loading datasets of type TEXT. Can be specified by passing in memory data or via a file path. Options pertaining the TEXT may also be specified using the options dict parameter.

TextData(input_file_path=None, data=None, options=None)

Possible options:

  • data_format: user selected format in which to return data. Currently only supports “text”.

  • samples_per_line - chunks by which to read in the specified dataset

Data Using a URL

Data class for loading datasets of any type using a URL. Specified by passing in any valid URL that points to one of the valid data types. Options pertaining the URL may also be specified using the options dict parameter.

Data(input_file_path=None, data=None, options=None)

Possible options:

  • verify_ssl: must be a boolean string, choices: “True”, “False”. Set to “True” by default.

Data Using an AWS S3 URI

Data class for loading datasets from AWS S3 URI. Specified by passing in any valid bucket path that points to one of the valid data types.

Data(‘s3a://my-bucket/file_name.txt’)

Possible options:

  • storage_options: must be a dictionary where the keys for boto3 initialization are set If storage_options is provided in options, the below variables are retrieved from the dictionary provided. Otherwise, will retrieve from environment variables.

    • AWS_ACCESS_KEY_ID

    • AWS_SECRET_ACCESS_KEY

    • AWS_SESSION_TOKEN

    • AWS_REGION (default us-east-1)