sdcard

loadfile()

The loadfile(filename, buffer) method loads the named file. If the optional bytearray is None, then an empty file is created.

Parameters	Description
filename	The name of the file to read.
buffer	Optional. A bytearray to read the file into.

Returns: A bytearray with the file data.

# Read the file into new bytearray.
b = brain.sdcard.loadfile('MyTextFile.txt')

is_inserted()

The is_inserted() method returns the status of the SD Card.

Returns: True if an SD card is inserted into the brain. False if it is not.

filesize()

The filesize(filename) method returns the size in bytes of the named file.

Parameters	Description
filename	The name of the file to check.

Returns: The size of file in bytes.

savefile()

The savefile(filename, buffer) method saves a bytearray into a named file. If the optional bytearray is None, then an empty file is created.

Parameters	Description
filename	The name of the file to write.
buffer	Optional. A bytearray to write into the file.

Returns: The number of bytes written.

# Write the bytearray into a file.
brain.sdcard.savefile('MyTextFile.txt', bytearray("Hello "))

appendfile()

The appendfile(filename, buffer) method appends a bytearray into a named file. Append is used to add more data to an existing file.

Parameters	Description
filename	The name of the file to write.
buffer	A bytearray to write into the file.

Returns: The number of bytes written.

# Append the bytearray into a file.
brain.sdcard.appendfile('MyTextFile.txt', bytearray("World "))

size()

The size(filename) method returns the size in bytes of the named file.

Parameters	Description
filename	The name of the file to check.

Returns: The size of file in bytes.

exists()

The exists(filename) method checks to see if the named file exists on the sd card.

Parameters	Description
filename	The name of the file to check.

Returns: True if file exists. False if it does not exist.