Query Syntax

:DISK:FILE:SIZE? "filename"

Description

Returns the size of a file in bytes. To determine if a file exists, use the :DISK:FILE:EXISTs? query. If file does not exists, 0 is returned. To return a time stamp for the file, use the :DISK:FILE:TIMestamp? query.

Example

This Python script (with PyVISA) tests if a specific screen image file exists and returns its size in bytes.

# -*- coding: utf-8 -*-
"""
Checks is file exists and returns its size in bytes.
"""
import visa

rm = visa.ResourceManager('C:\\Program Files (x86)\\IVI Foundation\\VISA\\WinNT\\agvisa\\agbin\\visa32.dll')
FlexDCA = rm.open_resource("TCPIP0::localhost::hislip0::INSTR")

#Set Timeout - 10 seconds
FlexDCA.timeout =  10000
FlexDCA.read_termination = '\n'

filePath = '"%USER_DATA_DIR%\\Screen Images\\screenimage.png"'
if FlexDCA.query(':DISK:FILE:EXISts? ' + filePath) == '1':
    print('File exists!')
    size = FlexDCA.query(':DISK:FILE:SIZE? ' + filePath)
    print('File is ' + size + ' bytes')
else:
    print('File not found.')
FlexDCA.write(':SYSTem:GTLocal')
FlexDCA.close()