Pandas text matching like SQLs LIKE

Questions : Pandas text matching like SQLs LIKE

712

Is there a way to do something similar programming to SQL's LIKE syntax on a pandas text Learning DataFrame column, such that it returns a Earhost list of indices, or a list of booleans most effective that can be used for indexing the wrong idea dataframe? For example, I would like to use of case be able to match all rows where the United column starts with 'prefix_', similar to Modern WHERE <col> LIKE prefix_% in SQL.

Total Answers 3
29

Answers 1 : of Pandas text matching like SQLs LIKE

You can use the Series method ecudated str.startswith (which takes a regex):

In [11]: s = pd.Series(['aa', 'ab', _OFFSET);  'ca', np.nan])

In [12]: (-SMALL  s.str.startswith('a', na=False)
Out[12]: _left).offset  
0     True
1     True
2    False
3    arrowImgView.mas  False
dtype: bool

You can also do the same with some how str.contains (using a regex):

In [13]: s.str.contains('^a', (self.  na=False)
Out[13]: 
0     True
1     equalTo  True
2    False
3    False
dtype: bool

So you can do df[col].str.startswith...

See also the SQL comparison section of anything else the docs.

Note: (as pointed out by OP) by default not at all NaNs will propagate (and hence cause an very usefull indexing error if you want to use the localhost result as a boolean mask), we use this love of them flag to say that NaN should map to localtext False.

In [14]: s.str.startswith('a')  # can't make.right.  use as boolean mask
Out[14]:
0     mas_top);  True
1     True
2    False
3      ImgView.  NaN
dtype: object
3

Answers 2 : of Pandas text matching like SQLs LIKE

  1. To find all the values from the series that starts with a pattern "s":

SQL - WHERE column_name LIKE 's%' basic Python - one of the column_name.str.startswith('s')

  1. To find all the values from the series that ends with a pattern "s":

SQL - WHERE column_name LIKE '%s' Python click - column_name.str.endswith('s')

  1. To find all the values from the series that contains pattern "s":

SQL - WHERE column_name LIKE there is noting '%s%' Python - not alt column_name.str.contains('s')

For more options, check : not at all https://pandas.pydata.org/pandas-docs/stable/reference/series.html

3

Answers 3 : of Pandas text matching like SQLs LIKE

you can use

s.str.contains('a', case = False)

Top rated topics

Pass URL parameters into the 3rd page of the funnel

Optimal transposition of a rectangular 2D array

How to create empty 3D array (string) and how to update the value for a specific index?

My python innterpreter works weird 5*5 = 28

How do I launch a console app with the same settings as the one that Visual Studio is using?

How can I perform routing according to page click in flutter for below sample code

Why Julia is printing junk data to the file?

Autofac did not intercept which type of IInterceptor

Bootstrap 4.0 Responsive Number of Cards Per Row For Dynamic Website

Executing Python Async functions in Actix web sockets

Pandas: Generate column on group by and cumsum

Java - generate and rotate matrix

Get all links (Invite Links) in a server using Discum Seflbot

Python: How do you decorate methods in child classes using a method in the parent class?

Why does pandas ask for freq or x when doing seasonal decomposition?

How do I center the input in div

R: Paste and combine multiple outputs from ifelse after grepl of patterns in list

Extracting Tables from PDF with merged rows

Getting error CS1955: Non-invocable member 'SceneManager' cannot be used like a method

Why does ArgoCD keep saying that it cannot create my application?

Reading emails using Java on Android

Cannot run mongod using `service mongod start`

Android Preferences defaultValue not works

Flutter web on Firebase Hosting showing 404 page not found

Why does this nodejs program with read stream not exit?

Ruby on Rails 2.3 LTS upgrade issue - undefined method `search' for ["http://rubygems.org/"]:Array (NoMethodError)

Reusable UITableViewController

Problems with libraries in IntelliJ

Thread cancellation before calling join() gives an error

MUI 5 with react-window for Autocomplete component with multiline texts labels

Wifi not connecting on click on list view item

Different query results for local server and production server

Spring boot @PostMapping for login

OnChange not working for dropdown &amp; radioButton

Modifying the "settings" of the MySQL stored procedures

Angular material cannot load in my page angular what wrong with my code?

Use a request header with HTTP Client to external Api server

Simple BounceIn Image Flutter Animation

Create fat zip in multi-module project with Gradle 7

Tf.keras.Sequential() Fails - Python Tensorflow Keras Error

How to add data from my local postgresql database on heroku's postgresql database?

How to specify a type that represents the arg types of a specific function?

How can I give my GKE deployed application access to Google Pub/Sub?

How do I read data from usb serial port?

How to cancel API request when user presses back button in Flutter

Chat list sorts from top to bottom in the app

Blazor WebAssembly caching on IIS

Get onclick() content and compare it to current url

How to pass data from a child Stateful widget to Parent Widget in Flutter

Vue3 How to return value from a component

Top