"""
file: grep.py
author: CS1510
description: Implements the Unix grep program
"""

###First Way### Using find() method

search = input("grep: ")
fileName = input("in: ")

fin = open(fileName,"r")

counter = 0

#"line" is each line in the file, one at a time
for line in fin:
	counter += 1 #for the line numbers
	
	#lowercase both the line and search
	lineLower = line.lower() 
	if lineLower.find(search.lower()) > 0:
		print(counter, line, end='')
fin.close()

###Second Way### Using the in operator
##
##search = input("grep: ")
##search = search.lower()
##
##fileName = input("in: ")
##
##fin = open(fileName,"r")
##
##counter = 0
##
##for line in fin:
##        counter +=1
##        lineLower = line.lower()
##        if search in lineLower:
##                print(counter,line,end='')
##fin.close()