Sys Module

# Sys Module 
# Provides functions and variables related to the Python runtime environment 
# Gives access to data sent as part of the command line arguments when execurint scripts 

# Import module 
import sys 

# Print Python version 
print(sys.version)

# See current binary 
print(sys.executable)

# See OS 
print(sys.platform)

# Access low level functions 
# Force python to flush buffer - will write everything directly to the terminal 
for i in range(1,5):
	sys.stdout.write(str(i))
	sys.stdout.flush()
	
# Make a status bar to show progress of job 
import time 

for i in range(0,51):
	time.sleep(0.1)
	sys.stdout.write("{} [{}{}]\r".format(i, '#'*i, "."*(50-i)))
	sys.stdout.flush()
sys.stdout.write("\n")

# Give a list of command line arguments given to script  
print(sys.argv)

# Give error if arguments are missing 
if len(sys.argv) != 3: 
	print("[X] To run {} enter a username and password".format(sys.argv[0]))
	
# Assign values 
username = sys.argv[1]
password = sys.argv[2]