File Handling in Python

example4.py

# Example 1
with open('test1.txt', 'w') as f:
    f.writelines(["1", "2", "3"])
# The contents of test1.txt is:
# 123

# Example 2
with open('test2.txt', 'w') as f:
    f.writelines(["1\n", "2\n", "3\n"])
#    The contents of test2.txt is:
#    1
#    2        
#    3