Question

我有以下数据框。

company,compid,secid
a,a1,a2
b,b1,b2

我需要输出如下格式

company,compid,secid,url
a,a1,a2,http://www.cssss.com/companydetails.aspx?compid=a1&secid=a2
b,b1,b2,http://www.cssss.com/companydetails.aspx?compid=b1&secid=b2

如何在url列中添加列值？

Answer 1

使用：

df['url'] = 'http://www.cssss.com/companydetails.aspx?compid=' +
             df.compid + '&secid=' + df.secid
print (df)
  company compid secid                                                url
0       a     a1    a2  http://www.cssss.com/companydetails.aspx?compi...
1       b     b1    b2  http://www.cssss.com/companydetails.aspx?compi...

我更改url进行测试：

df['url'] = 'http:aaa.aspx?compid=' + df.compid + '&secid=' + df.secid
print (df)
  company compid secid                               url
0       a     a1    a2  http:aaa.aspx?compid=a1&secid=a2
1       b     b1    b2  http:aaa.aspx?compid=b1&secid=b2

如果dtypes列compid和secid int为str，请astype强制转换为df['url'] = 'http:aaa.aspx?compid='+df.compid.astype(str)+'&secid='+df.secid.astype(str) print (df) company compid secid url 0 a a1 a2 http:aaa.aspx?compid=a1&secid=a2 1 b b1 b2 http:aaa.aspx?compid=b1&secid=b2：

compid

通过评论编辑：

如果secid列NaN和#code before data3 = pd.merge(df1,df2,on='company', how='outer') print (data3) company compid secid 0 a a1 a2 1 b b1 b2 2 a a1 NaN 3 b NaN NaN data3.loc[~data3[['compid','secid']].isnull().any(1), 'url'] = 'http:aaa.aspx?compid=' + data3.compid.astype(str) + '&secid=' + data3.secid.astype(str) data3.fillna('', inplace=True) print (data3) company compid secid url 0 a a1 a2 http:aaa.aspx?compid=a1&secid=a2 1 b b1 b2 http:aaa.aspx?compid=b1&secid=b2 2 a a1 3 b包含class Users::OmniauthCallbacksController < Devise::OmniauthCallbacksController def facebook # raise request.env['omniauth.auth'] # # You need to implement the method below in your model (e.g. app/models/user.rb) @user = User.from_omniauth(request.env["omniauth.auth"]) if @user.persisted? sign_in_and_redirect @user, :event => :authentication #this will throw if @user is not activated set_flash_message(:notice, :success, :kind => "Facebook") if is_navigational_format? else session["devise.facebook_data"] = request.env["omniauth.auth"] redirect_to new_user_registration_url end end def github # raise request.env['omniauth.auth'] # # You need to implement the method below in your model (e.g. app/models/user.rb) @user = User.from_omniauth(request.env["omniauth.auth"]) if @user.persisted? sign_in_and_redirect @user, :event => :authentication #this will throw if @user is not activated set_flash_message(:notice, :success, :kind => "Github") if is_navigational_format? else session["devise.github_data"] = request.env["omniauth.auth"] redirect_to new_user_registration_url end end def failure redirect_to root_path end end，则它可以为空字符串：

class User < ActiveRecord::Base
   devise :database_authenticatable, :registerable,
        :recoverable, :rememberable, :trackable, :omniauthable

   def self.from_omniauth(auth)
     where(provider: auth.provider, uid: auth.uid).first_or_create do |user|
       user.email = auth.info.email
       user.password = Devise.friendly_token[0,20]
       user.full_name = auth.info.name   # assuming the user model has a name
     end
   end         
 end

如何使用python pandas中的两个列值创建url列数据框？

1 个答案: