Question

我有str = 'some words\n'，我想用

将其打印到文件中

with open(newfile, 'a') as the_file:
    the_file.write(str)

我怎么能用'some words\n'而不是'some words'字面写字，最后输入？

Answer 1

请尝试像str = "some words \\n"一样翻回斜杠。

Answer 2

您需要转义转义字符：

str = 'some words\n'
with open(newfile, 'a') as the_file:
    str = str.replace("\n","\\n")
    the_file.write(str)

Answer 3

您可以使用原始字符串r'..'构造来执行此操作，也可以使用try catch块中的文件打开构造并在写入后关闭打开的文件描述符完整。

try:
    str = r'some words\n'
    with open('newfile', 'a') as fd:
        fd.write(str)
        fd.close()

except IOError as e:
    print('unable to open file newfile in append mode')

Answer 4

string = "some words\n"

with open("temp.txt", "w+") as fp:

        temp = string[:-2] + r'\n'

        fp.write(temp)

Answer 5

您可以使用不带引号的字符串表示。它将适用于所有转义序列，而不仅仅是'\ n'：

w = "some\twords\n"
repr(w)[1:-1] # some\twords\n

但引号存在问题：

w = '''single'double"quote'''
repr(w)[1:-1] # single\'double"quote

在python中将纯字符串写入文件

5 个答案: