How to pass string between operators?
I am working on an extension where I will define a model in a string with some operator and then pass the model to a Python operator to parse the model. I noticed that I can only deliver IOObject through the output ports, how can I pass a string between ports? How can I pass a string from self-defined operators to a Python script operator as input?
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Hi @CKönig
Could you give me some examples? I still have no idea.
Could you give me some examples? I still have no idea.
If I want to pass a string from input port to output port, what should I do?
And if I want to process the string in a python script operator, how should I format the string in the former output port?
Thank you!
Here is an example process how to take the strings from a dataset into python, work with them and return them to RM again.
<?xml version="1.0" encoding="UTF-8"?><process version="10.2.000">
<context>
<input/>
<output/>
<macros/>
</context>
<operator activated="true" class="process" compatibility="10.2.000" expanded="true" name="Process">
<parameter key="logverbosity" value="init"/>
<parameter key="random_seed" value="2001"/>
<parameter key="send_mail" value="never"/>
<parameter key="notification_email" value=""/>
<parameter key="process_duration_for_mail" value="30"/>
<parameter key="encoding" value="SYSTEM"/>
<process expanded="true">
<operator activated="true" class="retrieve" compatibility="10.2.000" expanded="true" height="68" name="Retrieve Golf" width="90" x="45" y="34">
<parameter key="repository_entry" value="//Samples/data/Golf"/>
</operator>
<operator activated="true" class="blending:select_attributes" compatibility="10.2.000" expanded="true" height="82" name="Select Attributes" width="90" x="179" y="34">
<parameter key="type" value="include attributes"/>
<parameter key="attribute_filter_type" value="one attribute"/>
<parameter key="select_attribute" value="Outlook"/>
<parameter key="select_subset" value=""/>
<parameter key="also_apply_to_special_attributes_(id,_label..)" value="true"/>
<description align="center" color="transparent" colored="false" width="126">Keep the nominal attribute &quot;Outlook&quot;, where every entry can be considered a &quot;String&quot;</description>
</operator>
<operator activated="true" class="python_scripting:execute_python" compatibility="10.0.001" expanded="true" height="103" name="Execute Python" width="90" x="313" y="34">
<parameter key="script" value="import pandas # rm_main is a mandatory function, # the number of arguments has to be the number of input ports (can be none), # or the number of input ports plus one if "use macros" parameter is set # if you want to use macros, use this instead and check "use macros" parameter: #def rm_main(data,macros): def rm_main(data): # add a new column with reversed strings of column "Outlook" data["Outlook_reversed"]=data["Outlook"].str.split('').apply(lambda x: ''.join(x[::-1])) return data "/>
<parameter key="notebook_cell_tag_filter" value=""/>
<parameter key="use_default_python" value="true"/>
<parameter key="package_manager" value="conda (anaconda)"/>
<parameter key="use_macros" value="false"/>
</operator>
<connect from_op="Retrieve Golf" from_port="output" to_op="Select Attributes" to_port="example set input"/>
<connect from_op="Select Attributes" from_port="example set output" to_op="Execute Python" to_port="input 1"/>
<connect from_op="Execute Python" from_port="output 1" to_port="result 1"/>
<portSpacing port="source_input 1" spacing="0"/>
<portSpacing port="sink_result 1" spacing="0"/>
<portSpacing port="sink_result 2" spacing="0"/>
</process>
</operator>
</process>
@"CKönig"
Thank you for the example.
However I am working on an extension here, and I guess I can only pass a string like "This is a String" with an IOTable under an attribute "XX"?
At this time I built a new IO type to pass the string between non-python operators, if python operator can only get data from a pandas data frame, maybe I should follow the IOTable way of doing this.
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Hi @Haoyang
You can pass it as part of an ordinary example set, with one nominal attribute containing one example.
You can pass it as part of an ordinary example set, with one nominal attribute containing one example.
Hi,
what you could also try:
- Generate the complete python code and pass it as a FileObject (for the scr port) or call the Execute Python operator from your code
- Use Macros
Greetings,
Jonas
what you could also try:
- Generate the complete python code and pass it as a FileObject (for the scr port) or call the Execute Python operator from your code
- Use Macros
Greetings,
Jonas
You can pass it as part of an ordinary example set, with one nominal attribute containing one example.