How can I check file size in Python?

import os
os.path.getsize('C:\\Python27\\Lib\\genericpath.py')

or

import os
os.stat('C:\\Python27\\Lib\\genericpath.py').st_size

or

from pathlib import Path
Path('C:\\Python27\\Lib\\genericpath.py').stat().st_size

 
By the way, to convert from bytes to any other unit by doing a right shift by 10 you basically shift it by an order (multiple).
 
Example: 5GB are 5368709120 bytes

print (5368709120 >> 10)  # 5242880 kilobytes (kB)
print (5368709120 >> 20 ) # 5120 megabytes (MB)
print (5368709120 >> 30 ) # 5 gigabytes (GB)

 
 
ref:
• Getting file size in Python?
• How can I check file size in Python?