python read file line by line

1with open("file.txt") as file_in:
2    lines = []
3    for line in file_in:
4        lines.append(line)

1with open('file1.txt','r') as f:
2	listl=[]
3	for line in f:
4		strip_lines=line.strip()
5		listli=strip_lines.split()
6		print(listli)
7		m=listl.append(listli)
8	print(listl)

1file1 = open('myfile.txt', 'r')
2Lines = file1.readlines()
3# usage:
4count = 0
5for line in Lines:
6    count += 1
7    print("Line{}: {}".format(count, line.strip()))

1# Open the file with read only permit
2f = open('my_text_file.txt')
3# use readline() to read the first line 
4line = f.readline()
5# use the read line to read further.
6# If the file is not empty keep reading one line
7# at a time, till the file is empty
8while line:
9    # in python 2+
10    # print line
11    # in python 3 print is a builtin function, so
12    print(line)
13    # use realine() to read next line
14    line = f.readline()
15f.close()
16

1with open(fname) as f:
2    content = f.read().splitlines()
3

1file1 = open('myfile.txt', 'r')#open the file (mode read)
2count = 0 #used to count the lines
3
4for line in Lines:
5	line = file1.readline()#read a single line
6    if not line:
7    	break
8    count += 1
9    print("Line{}: {}".format(count, line))#print the lines with their number
10