replace first word in each line python file code example
Example: how to replace first line of a textfile python
with open("test.txt") as f:
lines = f.readlines()
lines # ['This is the first line.\n', 'This is the second line.\n']
lines[0] = "This is the line that's replaced.\n"
lines # ["This is the line that's replaced.\n", 'This is the second line.\n']
with open("test.txt", "w") as f:
f.writelines(lines)