Question

我正在尝试将'\ s'替换为'\ n'，但是当我打印line2时，它不会打印一行，并用新行替换空格。有人能说出我的语法有什么问题吗？

for line in fi:
    if searchString in line:
        line2 = line.replace('\s' , '\n') 
        print line2

Answer 1

.replace()替换字符串，您需要re.sub(..)，例如：

for line in fi:
    if searchString in line:
        line2 = re.sub(r'\s' , '\n', line) 
        print line2

文档包含更多详细信息：https://docs.python.org/2/library/re.html#re.sub

Answer 2

str.replace是正则表达式令牌，line.replace(' ', '\n')无法理解。

执行：

class Game < ActiveRecord::Base
  # has the following attributes
  # starting_player_id:integer:index

  belongs_to :starting_player, class: Player
  has_many :players
end

class Player < ActiveRecord::Base
  # has the following attributes
  # game_id:integer:index

  has_one :starting_game, foreign_key: :starting_player_id, class: Game
  belongs_to :game
end

用Python中的新行替换空格

2 个答案: