Input/output

yli.pickle_read_compressed(fname)

Read a DataFrame from a compressed file

See yli.pickle_write_compressed().

Parameters:

fname (str) – Filename to read data from

Return type:

DataFrame

yli.pickle_read_encrypted(fname)

Read a DataFrame from an encrypted file

See yli.pickle_write_encrypted().

Parameters:

fname (str) – Filename to read data from

Return type:

DataFrame

yli.pickle_write_compressed(df, fname)

Write the DataFrame to a compressed file

The DataFrame is serialised with pickle, then compressed with LZMA.

Parameters:

• df (DataFrame) – Data to serialise

• fname (str) – Filename to write data to

yli.pickle_write_encrypted(df, fname)

Write the DataFrame to an encrypted file

Prompts the user for a password.

The DataFrame is serialised with pickle, compressed with LZMA, then encrypted. Encryption uses AES-256-CTR. Encryption key is derived from the password using the scrypt KDF.

Parameters:

• df (DataFrame) – Data to serialise

• fname (str) – Filename to write data to