Python--将内容写入文本文件中

#-*- coding: utf-8 -*-

import sys

__cfg__version__  = 'debug'  # release

if __name__ == '__main__':
    print("main")
    header = "File Header"
    
    fd = open('./test.txt', 'w')
    
    print(header, file = fd)
    
    strout = ""
    
    for i in range(500):
        strout = ""
        tmp = format(i, '15d')
        strout += str(tmp)
        
        print(strout, end = '', file = fd)
        
        if ((i+1)%10) == 0:
            if i != 0:
                print("", end = '\n', file = fd)