python中如何用ljust()实现字符串左对齐？

str.ljust(width[, fillchar])

.ljust(width[, fillchar])

<p style="line-height: normal;"># -*- coding: utf-8 -*-

# @File:     check_data.py

# @Project:  test_project

# @Date:     2019/3/28 9:25

# @Author:   MaiXiaochai

def ljust_demo():

    string = "Hello Python!"

    print("string_len: ", len(string))

    print(string.ljust(15, '+'))<br></p>

# Out:

string_len:  13

Hello Python!++