Allows executing a Python script in a local Python environment. The environment has to be configured under
File → Preferences → KNIME → Python or via flow variable, as described in the
KNIME Python Integration Installation Guide
.
This node supports Python 2 and 3. It also allows to import Jupyter notebooks as Python modules via the
knime_jupyter
module that is available in the node's Python workspace.
Multiple input and output ports of various types can dynamically be added to the node and used in the script.
See section Ports below for a description of all available inputs and outputs, and how they can be
addressed in the Python script.
Options
Script
Executable Selection
Templates
Flow Variables
Input Ports
- No description for this port available.
…- An input object. Input objects are automatically unpickled and made available to the Python script as variables whose names follow the scheme: input_object_<index>. For example, variable input_object_1 refers to the object at the first inbound Pickled object port.
- …
- An input table. In the Python script, input tables are available as variables of type pandas.DataFrame. The names of the variables follow the scheme: input_table_<index>. For example, variable input_table_1 refers to the table at the first inbound Table port.
Output Ports
- No description for this port available.
- …
- An output table. The corresponding variable must be defined in the Python script. It must be of type pandas.DataFrame and its name must follow the scheme: output_table_<index>. For example, in order to populate the first outbound Table port, variable output_table_1 must be defined as described.
…- An output image. The corresponding variable must be defined in the Python script. It must be either a string describing an SVG image or a byte array encoding a PNG image. Its name must follow the scheme: output_image_<index>. For example, in order to populate the first outbound Image port, variable output_image_1 must be defined as described.
- …
- An output object.The corresponding variable must be defined in the Python script. It can be of any type that can be pickled. Its name must follow the scheme: output_object_<index>. For example, in order to populate the first outbound Pickled object port, variable output_object_1 must be defined as described.
Popular Predecessors
- Python Script (legacy)5 %
- Row Filter5 %
- GroupBy4 %
- Column Filter4 %
- Table Creator3 %
- Joiner2 %
- Excel Reader2 %
- String Manipulation2 %
Column Rename2 %- CSV Reader2 %
- Conda Environment Propagation2 %
- Excel Writer2 %
- Missing Value1 %
- Python Source (legacy)1 %
- Concatenate1 %
- Chunk Loop Start1 %
- Math Formula1 %
- String to Number< 1 %
- Duplicate Row Filter< 1 %
- Sorter< 1 %
- Loop End< 1 %
- Column Resorter< 1 %
- RowID< 1 %
- Rule-based Row Filter< 1 %
- Cross Joiner< 1 %
- Row Splitter< 1 %
- Group Loop Start< 1 %
- File Reader< 1 %
- Top k Row Filter< 1 %
- Column Expressions< 1 %
- Cell Splitter< 1 %
- Variable Creator< 1 %
- Merge Variables< 1 %
- String to Date&Time< 1 %
- CSV Writer< 1 %
- Row Sampling< 1 %
- Number to String< 1 %
- Rule Engine< 1 %
- Value Counter< 1 %
- String Manipulation (Variable)< 1 %
- Table Row to Variable Loop Start< 1 %
- Constant Value Column< 1 %
- DB Query Reader< 1 %
- Column Splitter< 1 %
- Nominal Value Row Filter< 1 %
- List Files/Folders< 1 %
- Counting Loop Start< 1 %
- Variable to Table Row< 1 %
Cell Replacer< 1 %- Excel Cell Updater< 1 %
- Logistic Regression Predictor< 1 %
- Column Appender< 1 %
- Row Splitter (Labs)< 1 %
- DB Insert< 1 %
- Reference Row Filter< 1 %
- Path to String (Variable)< 1 %
- String Input (legacy)< 1 %
- R Snippet< 1 %
- Table Manipulator< 1 %
- Rule-based Row Splitter< 1 %
- Python Predictor (legacy)< 1 %
- SDF Writer< 1 %
- Table Reader< 1 %
- Create Table Structure< 1 %
- DB Writer< 1 %
- JSON to Table< 1 %
- Extract Context Properties< 1 %
- Column Renamer (Dictionary)< 1 %
- Data Generator< 1 %
- Document Data Extractor< 1 %
- Line Plot (JavaScript)< 1 %
- String Widget< 1 %
- Python Object Reader (legacy)< 1 %
- Python Edit Variable (legacy)< 1 %
- RDKit To Molecule< 1 %
Flow Variable IF Switch< 1 %- Column Auto Type Cast< 1 %
Joiner< 1 %- Path to String< 1 %
- String to Path< 1 %
- Extract Date&Time Fields< 1 %
- Column Renamer< 1 %
- Read Images< 1 %
- Partitioning< 1 %
- Empty Table Creator< 1 %
- String to Path (Variable)< 1 %
- Single Selection Configuration< 1 %
- Image Properties< 1 %
- Date&Time to String< 1 %
- Date&Time-based Row Filter< 1 %
- RDKit Canon SMILES< 1 %
- Wait...< 1 %
- Table Row to Variable< 1 %
Generic Loop Start< 1 %- Scorer< 1 %
- Column Combiner< 1 %
- Normalizer< 1 %
- Round Double< 1 %
- DB Reader< 1 %
- Create File/Folder Variables< 1 %
- String Configuration< 1 %
- RDKit Descriptor Calculation< 1 %
- Normalizer (PMML)< 1 %
- Regression Predictor< 1 %
- Numeric Scorer< 1 %
- Filter Apply< 1 %
- Empty Table Switch< 1 %
- TimeDelay Loop Start< 1 %
- Line Plot (Plotly)< 1 %
- External Tool< 1 %
- Math Formula (Variable)< 1 %
- Google Sheets Reader< 1 %
- Boolean Configuration< 1 %
- Multiple Selection Configuration< 1 %
- Value Selection Configuration< 1 %
- Container Input (Table)< 1 %
XML Reader< 1 %- HTML Parser< 1 %
- Wait< 1 %
- Term Vector< 1 %
- PDB Loader< 1 %
- Catch Errors (Var Ports)< 1 %
- X-Partitioner< 1 %
- Category to Number< 1 %
- Missing Value Column Filter< 1 %
- Row Filter (Labs)< 1 %
- Data Explorer< 1 %
- Workflow Executor< 1 %
- Math Formula (Multi Column)< 1 %
- Read Excel Sheet Names< 1 %
- Double Configuration< 1 %
- Parameter Optimization Loop Start< 1 %
- RDKit From Molecule< 1 %
- RDKit Substructure Filter< 1 %
- SHAP Loop End< 1 %
- Load SD-Files (SDF)< 1 %
- PDB Saver< 1 %
- Binary Objects to Strings< 1 %
- String to URI< 1 %
- Table Column to Variable< 1 %
Loop End< 1 %- Generic Loop Start< 1 %
- Column Name Extractor< 1 %
- Lag Column< 1 %
- Domain Calculator< 1 %
- Pivot< 1 %
- Rule Engine Variable< 1 %
- CASE Switch Start< 1 %
- Color Manager< 1 %
- Sentence Extractor< 1 %
- Transfer Files< 1 %
- Nominal Row Filter Configuration< 1 %
- Local File Browser Configuration< 1 %
- List Box Input (legacy)< 1 %
- Table Editor (JavaScript)< 1 %
- Multiple Selection Widget< 1 %
- String to JSON< 1 %
- Table to JSON< 1 %
JSON Reader< 1 %- Image to DataRow< 1 %
- Python Learner (legacy)< 1 %
- Date&Time Difference< 1 %
- RDKit Fingerprint< 1 %
- One-way ANOVA< 1 %
Regex Extractor< 1 %- Parquet Writer< 1 %
- Image Writer (Port)< 1 %
- External SSH Tool< 1 %
- Split Collection Column< 1 %
- URL to File Path< 1 %
- Try (Data Ports)< 1 %
- Inject Variables (Data)< 1 %
- Table Writer< 1 %
- Java Edit Variable< 1 %
- Java Snippet< 1 %
- Loop End (Column Append)< 1 %
- Recursive Loop End< 1 %
- Variable Loop End< 1 %
- X-Aggregator< 1 %
- PCA< 1 %
- Column Merger< 1 %
- Column Rename (Regex)< 1 %
- Reference Row Splitter< 1 %
- Renderer to Image< 1 %
- Numeric Outliers< 1 %
- CASE Switch End< 1 %
- IF Switch< 1 %
- Parallel Chunk Start< 1 %
- Counter Generation< 1 %
- Keras Network Executor< 1 %
- RegEx Filter< 1 %
- Tika Parser< 1 %
- Create Folder< 1 %
- Column Filter Configuration< 1 %
- Integer Input (legacy)< 1 %
- Table View (JavaScript)< 1 %
- Columns to JSON< 1 %
- GET Request< 1 %
Extract Date&Time Fields< 1 %- Window Loop Start< 1 %
- Single Selection (legacy)< 1 %
- Extract Text< 1 %
- Molecule Converter (Naomi)< 1 %
- Transfer Files (Table)< 1 %
- Canonical SMILES< 1 %
- Load Local PDB Files< 1 %
- Shapefile Point Reader< 1 %
- Python Snippet< 1 %
- Python Source< 1 %
- MolConverter< 1 %
- Binary Objects to Files< 1 %
- URL to File Path (Variable)< 1 %
- Try (Variable Ports)< 1 %
- Create File Name (legacy)< 1 %
Database Reader< 1 %- File Reader (Complex Format)< 1 %
- Line Reader< 1 %
Table Reader< 1 %- Column List Loop Start< 1 %
- Column Aggregator< 1 %
- One to Many< 1 %
- Table Validator< 1 %
- Reference Column Filter< 1 %
- Ungroup< 1 %
CASE Switch Data (Start)< 1 %- Parquet Reader< 1 %
- Parallel Chunk End< 1 %
- OpenBabel< 1 %
- PDF Parser< 1 %
Transfer Files< 1 %- Column Filter (legacy)< 1 %
- Date&Time Input (legacy)< 1 %
- Value Selection (legacy)< 1 %
- Tag Cloud (JavaScript)< 1 %
- Column Filter Widget< 1 %
- File Upload Widget< 1 %
- Integer Widget< 1 %
- List Box Widget< 1 %
- Refresh Button Widget< 1 %
- Single Selection Widget< 1 %
- Value Selection Widget< 1 %
- Moving Average< 1 %
- RDKit Generate Coords< 1 %
- Weka Predictor (3.7)< 1 %
- XGBoost Predictor< 1 %
- XGBoost Predictor (Regression)< 1 %
- CIR< 1 %
- Silhouette Coefficient< 1 %
- PDB Reader< 1 %
- Collection to String< 1 %
- Shapefile Polygon Reader< 1 %
- IDTextReader< 1 %
- Advanced MolConverter< 1 %
- logD< 1 %
- Create Collection Column< 1 %
- Copy/Move Files (legacy)< 1 %
- Breakpoint< 1 %
- Catch Errors (Data Ports)< 1 %
- Variable to Table Column< 1 %
- Model Reader< 1 %
File Reader< 1 %Counting Loop Start< 1 %- Recursive Loop Start< 1 %
Recursive Loop Start< 1 %- Naive Bayes Predictor< 1 %
- MultiLayerPerceptron Predictor< 1 %
- Linear Regression Learner< 1 %
- Random Forest Predictor (Regression)< 1 %
- Expand Bit Vector< 1 %
- Case Converter< 1 %
- Double to Integer< 1 %
- Missing Value (Apply)< 1 %
- Rank< 1 %
- String Manipulation (Multi Column)< 1 %
- String Replacer< 1 %
- Table Difference Finder< 1 %
- Table Transposer< 1 %
- Unpivot< 1 %
- Statistics< 1 %
- End IF< 1 %
- Cache< 1 %
- Extract Table Dimension< 1 %
- Extract Table Spec< 1 %
- Spark to Table< 1 %
- Capture Workflow Start< 1 %
- Molecule Type Cast< 1 %
- SDF Reader< 1 %
- Variable Expressions< 1 %
- Java Snippet (simple)< 1 %
- Java Snippet Row Filter< 1 %
- Tika Language Detector< 1 %
- Strings to Document< 1 %
- Path to URI< 1 %
- Create Temp Folder< 1 %
- Credentials Configuration< 1 %
- Date&Time Configuration< 1 %
- Integer Configuration< 1 %
- List Box Configuration< 1 %
- Column Selection Configuration< 1 %
- File Chooser (legacy)< 1 %
- Scatter Plot (JavaScript)< 1 %
- Boolean Widget< 1 %
- Double Widget< 1 %
Container Input (Variable)< 1 %- Container Output (Table)< 1 %
- JSON Reader< 1 %
- Container Input (JSON)< 1 %
- JSON Path< 1 %
- JSON Transformer< 1 %
- Image Converter< 1 %
- Image Normalizer< 1 %
- Python Object Writer (legacy)< 1 %
- POST Request< 1 %
- Webpage Retriever< 1 %
- Salesforce Simple Query< 1 %
- Test Data Generator< 1 %
- Legacy Date&Time to Date&Time< 1 %
- Create Date&Time Range< 1 %
- Date&Time Shift< 1 %
- String to Date/Time (legacy)< 1 %
- Workflow Service Output< 1 %
- XML Reader< 1 %
- XPath< 1 %
- RDKit Molecule Substructure Filter< 1 %
- HTTP Retriever< 1 %
- Table to HTML String< 1 %
- Denormalizer< 1 %
- RDKit Kekulizer< 1 %
- Interval Loop Start< 1 %
- PCA Apply< 1 %
- PDB Downloader< 1 %
- Regex Split< 1 %
- MAE-to-Smiles< 1 %
IF Switch (Flow Variable Value)< 1 %- List Audio Files< 1 %
- Binary Objects to PNGs< 1 %
- PNGs to Binary Objects< 1 %
- Port to URI< 1 %
- Gradient Boosted Trees Predictor (Regression)< 1 %
- Auto-Binner< 1 %
- Linear Correlation< 1 %
- Normalizer (Apply)< 1 %
- Crosstab< 1 %
- Parameterized DB Query Reader< 1 %
- Random Number Assigner< 1 %
- JPython Function (Legacy)< 1 %
- Stop Word Filter< 1 %
- Boolean Input (legacy)< 1 %
- Nominal Row Filter Widget< 1 %
- JSON to XML< 1 %
- PNG Image to ImgPlus< 1 %
- Moving Aggregator< 1 %
- RDKit Chemical Transformation< 1 %
- XLS Formatter (apply)< 1 %
- Empty Collection to Missing< 1 %
- URL Encode< 1 %
- PDB Downloader (Source)< 1 %
- MarvinSketch< 1 %
- URI to String< 1 %
- Extract Variables (Data)< 1 %
- Image to Table< 1 %
Variable Condition Loop End< 1 %- Decision Tree Predictor< 1 %
- K Nearest Neighbor< 1 %
- Random Forest Predictor< 1 %
- Column to Grid< 1 %
- Mol2 Reader< 1 %
- Java IF (Table)< 1 %
- Decompress Files< 1 %
- Credentials Input (legacy)< 1 %
- Slider Input (legacy)< 1 %
- Credentials Widget< 1 %
- Column Selection Widget< 1 %
- Modify Time Zone< 1 %
- MAE-to-Pdb< 1 %
- Set PDB Name< 1 %
- Python Script 0:1< 1 %
- Set To List< 1 %
- PDB Sequence Extractor< 1 %
- Coordinate Row Filter< 1 %
- R Snippet< 1 %
- MzTabReader< 1 %
- R-group Decomposition< 1 %
- Elasticsearch Console (ES 6)< 1 %
- Fingerprints Expander< 1 %
- URL to Audio< 1 %
- Variable to Credentials< 1 %
Recursive Loop End< 1 %- SMOTE< 1 %
- Gradient Boosted Trees Predictor< 1 %
- Column Comparator< 1 %
- Extract Missing Value Cause< 1 %
- Number to String (PMML)< 1 %
- String to Number (PMML)< 1 %
- Shuffle< 1 %
CASE Switch Variable (End)< 1 %CASE Switch Data (End)< 1 %- Extract Color< 1 %
- ROC Curve (legacy)< 1 %
Parquet Writer< 1 %- k-Medoids< 1 %
- Model to Cell< 1 %
- Explorer Browser< 1 %
- Geo-Coordinate Row Filter< 1 %
- TF< 1 %
- Markup Tag Filter< 1 %
- Tag Filter< 1 %
- Repository File Chooser Configuration< 1 %
- Double Input (legacy)< 1 %
- Column Selection (legacy)< 1 %
- Tile View (JavaScript)< 1 %
- Interactive Range Slider Filter Widget< 1 %
- XML to JSON< 1 %
- Workflow Service Input< 1 %
- 3D Coordinates< 1 %
- RDKit Remove Hs< 1 %
- URL Domain Extractor< 1 %
- Current URL< 1 %
- WAV Reader< 1 %
- Window Slider< 1 %
- List to FlowVariable< 1 %
Read PDB< 1 %- XLS Control Table Generator< 1 %
- Standardizer< 1 %
Input File< 1 %- Total Count< 1 %
Flow Variable End IF< 1 %- Read Variables< 1 %
- KNIME URI Resolver< 1 %
- Run Garbage Collector< 1 %
- Credential Variable Extractor< 1 %
- Load text-based files< 1 %
- Save File Locally< 1 %
- URL Decode< 1 %
- Outlier Removal< 1 %
- Python Snippet 2:2< 1 %
- Convert to Table< 1 %
- Naming< 1 %
- Topology Analysis< 1 %
- Create Directory (legacy)< 1 %
- Download (legacy)< 1 %
- Files to Binary Objects< 1 %
- List Remote Files (legacy)< 1 %
- Strings to Binary Objects< 1 %
Simple File Reader< 1 %Table Row To Variable Loop Start< 1 %- Fuzzy Rule Predictor< 1 %
- Hierarchical Cluster Assigner (local)< 1 %
- k-Means< 1 %
- Polynomial Regression Learner< 1 %
- Add Empty Rows< 1 %
- Category to Number (Apply)< 1 %
- Many to One< 1 %
- Equal Size Sampling< 1 %
- Filter Apply Row Splitter< 1 %
- Denormalizer (PMML)< 1 %
- Reference Column Resorter< 1 %
- Linear Discriminant Analysis Apply< 1 %
CASE Switch Variable (Start)< 1 %CASE Switch Model (End)< 1 %- Timer Info< 1 %
- Shape Manager< 1 %
Parquet Reader< 1 %- Workflow Summary Extractor< 1 %
- Rxn/RD Reader< 1 %
- Amazon Translate< 1 %
- Parallel Chunk End (multi port)< 1 %
- DB Delete (Table)< 1 %
- DB SQL Executor< 1 %
- One Row to Many< 1 %
- Time Series Generator< 1 %
- Visual 2D Data Generator< 1 %
- Distance Matrix Calculate< 1 %
- DL Python Network Executor< 1 %
- TensorFlow Network Executor< 1 %
- PMML to Cell< 1 %
- Cell to Model< 1 %
- Send to Power BI< 1 %
- SharePoint Online List Reader< 1 %
- Vocabulary Extractor (legacy)< 1 %
- IDF< 1 %
- StanfordNLP Open Information Extractor< 1 %
- Topic Extractor (Parallel LDA)< 1 %
- Dictionary Filter< 1 %
- Dictionary Replacer< 1 %
- N Chars Filter< 1 %
- Number Filter< 1 %
- Snowball Stemmer< 1 %
- Stanford Lemmatizer< 1 %
- Tag Stripper< 1 %
- Flat File Document Parser< 1 %
- Word Parser< 1 %
- Bag Of Words Creator< 1 %
- Term to String< 1 %
- Unique Term Extractor< 1 %
- Delete Files/Folders< 1 %
- CSS Editor< 1 %
- Value Filter Definition (legacy)< 1 %
- Value Filter (legacy)< 1 %
- Heatmap (JavaScript)< 1 %
- Interactive Value Filter Widget< 1 %
- Date&Time Widget< 1 %
- File Chooser Widget< 1 %
- Slider Widget< 1 %
- JSON Row Combiner and Writer< 1 %
- Container Input (Variable)< 1 %
JSON Writer< 1 %- Image Generator< 1 %
- Colorspace Converter< 1 %
- Projector< 1 %
- Don't Save Start< 1 %
- Parameter Optimization Loop End< 1 %
- Parameter Optimization Loop Start (Table)< 1 %
- Duration to String< 1 %
- UNIX Timestamp to Date&Time< 1 %
- Modify Time< 1 %
Precision Checker (Event Log)< 1 %- RDKit Molecule Extractor< 1 %
- RDKit Optimize Geometry< 1 %
- RDKit R-Group Decomposition< 1 %
- RDKit Salt Stripper< 1 %
- RDKit Substructure Counter< 1 %
- BERT Classification Learner< 1 %
- Neo4j Reader< 1 %
- Base64 Encoder< 1 %
- HTML Node to Text< 1 %
- HTTP Result Data Extractor< 1 %
- Extract Attribute< 1 %
Views
- Standard output
- The text sent by Python to its standard output during the execution of this node.
- Error output
- The text sent by Python to its error output during the execution of this node.
Workflows
(3D) Fragment library design workflowKNIME Hub- 00_R-PythonKNIME Hub
- 00_Visual_Analysis_of_Sales_Data(2)KNIME Forum
- 01_ClusteringKNIME Hub
- 01_Image_ReStyling_WebportalKNIME Hub
- Show all 370 workflows
Links
- Combination of math formula and rule engineby aworker on 2021-06-24forum.knime.com/p/127437
- PYTHON SCRIPT NODE WITH DYNAMIC PORTby danielesser on 2021-11-04forum.knime.com/p/138718
Developers
You want to see the source code for this node? Click the following button and we’ll use our super-powers to find it for you.