python - 字符串格式化和传递

Question

我正在尝试格式化下面的代码，但失败了，由于大括号已经就位，因此格式化功能无法正常工作。

def in_list(line):
  input = '{"word1":["one"], "word_list":{}, "bool":true}'.format(line)
  print(input)

msg = ["hello", "how", "are", "you"]
in_list(msg)



Expected Output:

'{"word1":["one"], "word_list":["hello","how","are","you"], "bool":true}'

有没有办法将列表传递到句子中。请告诉我，谢谢。

Answer 1

你必须把括号加倍{{ , }}
来自 docs :

Format strings contain “replacement fields” surrounded by curly braces {}. Anything that is not contained in braces is considered literal text, which is copied unchanged to the output. If you need to include a brace character in the literal text, it can be escaped by doubling: {{ and }}.

您可以使用:

def in_list(line):
    my_input = '{{"word1":["one"], "word_list":{0}, "bool":true}}'.format(line)
    print(my_input)

msg = ["hello","how","are","you"]
in_list(msg)

# {"word1":["one"], "word_list":['hello', 'how', 'are', 'you'], "bool":true}