小编Dav*_*vid的帖子

我需要读取一个包含逗号字段的CSV文件,因此我引用了包含逗号的字段,例如:

1, "text1,text2", "text3, text4", a, b, c

但是当我尝试用Python读取文件时,我得到的字段用逗号分隔,如下所示:

row[0] = 1
row[1] = text1
row[2] = text2
row[3] = text3
row[4] = text4
row[5] = a
row[6] = b
row[7] = c

我正在使用以下代码阅读CSV文件:

info = csv.reader(open('./info.csv'))  
for row in info :
    print row[0] + " * " + row[1] ...

是否可以读取包含逗号的双引号字段？

我正在插入一个包含外键的模型A到另一个模型B.

defmodule MyApp.ModelA do
  use MyApp.Web, :model

  schema "model_a" do
    field :type, :string, null: false
    field :data, :string, null: false
    belongs_to :model_b, MyApp.ModelB
    timestamps()
  end

  @required_fields ~w(type data)
  @optional_fields ~w()

  @doc """
  Builds a changeset based on the `struct` and `params`.
  """
  def changeset(struct, params \\ %{}) do
    struct
    |> cast(params, @required_fields, @optional_fields)
    |> assoc_constraint(:model_b)
  end
end

和模型B:

defmodule MyApp.ModelB do
  use MyApp.Web, :model

  schema "model_b" do
    field :username, :string
    field :pass, :string
    has_many :model_a, MyApp.ModelA
    timestamps()
  end

  @required_fields ~w(username …