除非写入二进制文件，否则使用打印。下面的例子很适合格式化csv文件:

def write_row(file_, *columns):
    print(*columns, sep='\t', end='\n', file=file_)

用法:

PHI = 45
with open('file.csv', 'a+') as f:
    write_row(f, 'header', 'phi:', PHI, 'serie no. 2')
    write_row(f)  # additional empty line
    write_row(f, data[0], data[1])

您还可以使用partial作为一种更python化的方式来创建这种包装器。在下面的例子中，用预定义的kwargs打印行。

from functools import partial


with open('file.csv', 'a+') as f:
    row = partial(print, sep='\t', end='\n', file=f)

    row('header', 'phi:', PHI, 'serie no. 2', end='\n\n')
    row(data[0], data[1])

注:

打印文档 “{},{}”。format(1， 'the_second') - https://pyformat.info/， PEP-3101 '\t' -制表符 函数定义中的*列-将任意数量的参数分派到列表-参见关于*args和**kwargs的问题

你可以使用:

file.write(your_string + '\n')

实际上，当你使用多行语法时，就像这样:

f.write("""
line1
line2
line2""")

你不需要添加\n!

file_path = "/path/to/yourfile.txt"
with open(file_path, 'a') as file:
    file.write("This will be added to the next line\n")

or

log_file = open('log.txt', 'a')
log_file.write("This will be added to the next line\n")

你可以在需要这种行为的特定地方装饰方法write:

#Changed behavior is localized to single place.
with open('test1.txt', 'w') as file:    
    def decorate_with_new_line(method):
        def decorated(text):
            method(f'{text}\n')
        return decorated
    file.write = decorate_with_new_line(file.write)
    
    file.write('This will be on line 1')
    file.write('This will be on line 2')
    file.write('This will be on line 3')

#Standard behavior is not affected. No class was modified.
with open('test2.txt', 'w') as file:
        
    file.write('This will be on line 1')
    file.write('This will be on line 1')
    file.write('This will be on line 1')  

请注意，该文件在Python 3中不支持，已被删除。你可以用open内置函数做同样的事情。

f = open('test.txt', 'w')
f.write('test\n')