read only the first line python

1f = open("test.txt", 'r')
2variable = f.readline(1)
3print(variable)

1with open('myfile.txt') as f:
2    first_line = f.readline()
3

1""" Read only the first line of a file """
2
3with open('file.txt') as f:
4    first_line = f.readline()
5    print(first_line)
6    
7""" or """
8
9f = open ('file.txt', 'r')
10first_line = f.readline()
11print (first_line)