CSVDatasetBlockDataStore

Documentation for eth_defi.event_reader.csv_block_data_store.CSVDatasetBlockDataStore Python class.

class CSVDatasetBlockDataStore

Store block data as CSV file.

Methods summary

__init__(path)	param path
floor_block_number_to_partition_start(n)
is_virgin()	Has this store any stored data.
load([since_block_number])	Load data from CSV file
peak_last_block()	Return the last block number stored on the disk.
save(df[, since_block_number, ...])	Save all data to CSV file.
save_incremental(df)	Write all partitions we are missing from the data.

__init__(path)

Parameters

path (pathlib.Path) – Path to the CSV file

is_virgin()

Has this store any stored data.

Returns

There is data to load.

Return type

bool

load(since_block_number=0)

Load data from CSV file

Parameters

since_block_number (int) – Ignored

Return type

pandas.core.frame.DataFrame

save(df, since_block_number=0, check_contains_all_blocks=True)

Save all data to CSV file.

Parameters

• since_block_number (int) – Ignored. Does not support incremental writing.

• check_contains_all_blocks – Check that we have at least one data record for every block. Note that trades might not happen on every block.

• df (pandas.core.frame.DataFrame) –

save_incremental(df)

Write all partitions we are missing from the data.

Parameters

df (pandas.core.frame.DataFrame) –

Return type

Tuple[int, int]

peak_last_block()

Return the last block number stored on the disk.

Return type

Optional[int]