I want to allow the user to choose several value from a list of values then later i want to use these values to iterate through a raster data set. But very time i keep getting errors saying the data set is not correct. My code is here: import arcpy , osinputraster = arcpy . GetParameterAsText ( 0 ) sea_level = arcpy . GetParameterAsText ( 1 ) fc = arcpy . GetParameterAsText ( 2 ) clipraster = arcpy . GetParameterAsTextvaluelist = [ x . strip ( ) for x in sea_level . split ( ";" ) ] for value in valuelist : arcpy . Clip_management ( inputraster , " #",clipraster,fc,"#","ClippingGeometry","MAINTAIN_EXTENT") clip_raster = arcpy . Raster ( clipraster ) floodedarea = os . path . join ( outputfolder + "floods" + str ( value ) ) areasbelow = clip_raster value areasbelow . save ( floodedarea ) arcpy . AddMessage ( areasbelow )

Thanks let me put in my codes and i will tell you the output

Remember when you obtain a parameter with GetParameterAsText you get it as text, when you use GetParameter you will directly have a list of numeric values. To explain this a little more, please see the example below: In my tool I collect a list of values: The script below contains this: def main ( ) : import arcpy sea_level = arcpy . GetParameterAsText ( 0 ) arcpy . AddMessage ( "\nGetParameterAsText(0)" ) arcpy . AddMessage ( "sea_level={0}" . format ( sea_level ) ) arcpy . AddMessage ( "type={0}" . format ( type ( sea_level ) ) ) lst_sea_level = sea_level . split ( ";" ) arcpy . AddMessage ( "lst_sea_level={0}" . format ( lst_sea_level ) ) arcpy . AddMessage ( "type of first element={0}" . format ( type ( lst_sea_level [ 0 ] ) ) ) lst_values = [ int ( v ) for v in lst_sea_level ] arcpy . AddMessage ( "lst_values={0}" . format ( lst_values ) ) arcpy . AddMessage ( "type of first element={0}" . format ( type ( lst_values [ 0 ] ) ) ) lst_sea_level = arcpy . GetParameter ( 0 ) arcpy . AddMessage ( "\nGetParameter(0)" ) arcpy . AddMessage ( "lst_sea_level={0}" . format ( lst_sea_level ) ) arcpy . AddMessage ( "type of first element={0}" . format ( type ( lst_sea_level [ 0 ] ) ) ) if __name__ == '__main__' : main ( ) In the first part it reads the parameter as text and you can see how it is processed to get a list of values. In the second part starting on line 19, I read the same parameter but now directly as a list without converting it to string. The result is this: In your case it will be much easier to use GetParameter then using GetParameterAsText.

In case the values are integers you can do this: valuelist = [ int ( x . strip ( ) ) for x in sea_level . split ( ";" ) ]

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how do i use values from a multiple value parameter into a function

stashavint

I want to allow the user to choose several value from a list of values then later i want to use these values to iterate through a raster data set. But very time i keep getting errors saying the data set is not correct. My code is here:

<SPAN class="keyword token">import</SPAN> arcpy<SPAN class="punctuation token">,</SPAN>os
inputraster <SPAN class="operator token">=</SPAN> arcpy<SPAN class="punctuation token">.</SPAN>GetParameterAsText<SPAN class="punctuation token">(</SPAN><SPAN class="number token">0</SPAN><SPAN class="punctuation token">)</SPAN>
sea_level <SPAN class="operator token">=</SPAN> arcpy<SPAN class="punctuation token">.</SPAN>GetParameterAsText<SPAN class="punctuation token">(</SPAN><SPAN class="number token">1</SPAN><SPAN class="punctuation token">)</SPAN>
fc <SPAN class="operator token">=</SPAN> arcpy<SPAN class="punctuation token">.</SPAN>GetParameterAsText<SPAN class="punctuation token">(</SPAN><SPAN class="number token">2</SPAN><SPAN class="punctuation token">)</SPAN>
clipraster <SPAN class="operator token">=</SPAN> arcpy<SPAN class="punctuation token">.</SPAN>GetParameterAsText
valuelist <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">[</SPAN>x<SPAN class="punctuation token">.</SPAN>strip<SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN> <SPAN class="keyword token">for</SPAN> x <SPAN class="keyword token">in</SPAN> sea_level<SPAN class="punctuation token">.</SPAN>split<SPAN class="punctuation token">(</SPAN><SPAN class="string token">";"</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">]</SPAN>
<SPAN class="keyword token">for</SPAN> value <SPAN class="keyword token">in</SPAN> valuelist<SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; arcpy<SPAN class="punctuation token">.</SPAN>Clip_management<SPAN class="punctuation token">(</SPAN>inputraster<SPAN class="punctuation token">,</SPAN>"<SPAN class="comment token">#",clipraster,fc,"#","ClippingGeometry","MAINTAIN_EXTENT")</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; clip_raster <SPAN class="operator token">=</SPAN> arcpy<SPAN class="punctuation token">.</SPAN>Raster<SPAN class="punctuation token">(</SPAN>clipraster<SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; floodedarea <SPAN class="operator token">=</SPAN> os<SPAN class="punctuation token">.</SPAN>path<SPAN class="punctuation token">.</SPAN>join<SPAN class="punctuation token">(</SPAN>outputfolder <SPAN class="operator token">+</SPAN> <SPAN class="string token">"floods"</SPAN> <SPAN class="operator token">+</SPAN> str<SPAN class="punctuation token">(</SPAN>value<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; areasbelow <SPAN class="operator token">=</SPAN> clip_raster <SPAN class="operator token"><=</SPAN> value
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; areasbelow<SPAN class="punctuation token">.</SPAN>save<SPAN class="punctuation token">(</SPAN>floodedarea<SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; arcpy<SPAN class="punctuation token">.</SPAN>AddMessage<SPAN class="punctuation token">(</SPAN>areasbelow<SPAN class="punctuation token">)</SPAN>‍‍‍‍‍‍‍‍‍‍‍‍‍‍<SPAN class="line-numbers-rows"><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN></SPAN>

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XanderBakker

Remember when you obtain a parameter with GetParameterAsText you get it as text, when you use GetParameter you will directly have a list of numeric values. To explain this a little more, please see the example below:

In my tool I collect a list of values:

The script below contains this:

<SPAN class="keyword token">def</SPAN> <SPAN class="token function">main</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">import</SPAN> arcpy

&nbsp;&nbsp;&nbsp; sea_level <SPAN class="operator token">=</SPAN> arcpy<SPAN class="punctuation token">.</SPAN>GetParameterAsText<SPAN class="punctuation token">(</SPAN><SPAN class="number token">0</SPAN><SPAN class="punctuation token">)</SPAN>

&nbsp;&nbsp;&nbsp; arcpy<SPAN class="punctuation token">.</SPAN>AddMessage<SPAN class="punctuation token">(</SPAN><SPAN class="string token">"\nGetParameterAsText(0)"</SPAN><SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp; arcpy<SPAN class="punctuation token">.</SPAN>AddMessage<SPAN class="punctuation token">(</SPAN><SPAN class="string token">"sea_level={0}"</SPAN><SPAN class="punctuation token">.</SPAN>format<SPAN class="punctuation token">(</SPAN>sea_level<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp; arcpy<SPAN class="punctuation token">.</SPAN>AddMessage<SPAN class="punctuation token">(</SPAN><SPAN class="string token">"type={0}"</SPAN><SPAN class="punctuation token">.</SPAN>format<SPAN class="punctuation token">(</SPAN>type<SPAN class="punctuation token">(</SPAN>sea_level<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">)</SPAN>

&nbsp;&nbsp;&nbsp; lst_sea_level <SPAN class="operator token">=</SPAN> sea_level<SPAN class="punctuation token">.</SPAN>split<SPAN class="punctuation token">(</SPAN><SPAN class="string token">";"</SPAN><SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp; arcpy<SPAN class="punctuation token">.</SPAN>AddMessage<SPAN class="punctuation token">(</SPAN><SPAN class="string token">"lst_sea_level={0}"</SPAN><SPAN class="punctuation token">.</SPAN>format<SPAN class="punctuation token">(</SPAN>lst_sea_level<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp; arcpy<SPAN class="punctuation token">.</SPAN>AddMessage<SPAN class="punctuation token">(</SPAN><SPAN class="string token">"type of first element={0}"</SPAN><SPAN class="punctuation token">.</SPAN>format<SPAN class="punctuation token">(</SPAN>type<SPAN class="punctuation token">(</SPAN>lst_sea_level<SPAN class="punctuation token">[</SPAN><SPAN class="number token">0</SPAN><SPAN class="punctuation token">]</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">)</SPAN>

&nbsp;&nbsp;&nbsp; lst_values <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">[</SPAN>int<SPAN class="punctuation token">(</SPAN>v<SPAN class="punctuation token">)</SPAN> <SPAN class="keyword token">for</SPAN> v <SPAN class="keyword token">in</SPAN> lst_sea_level<SPAN class="punctuation token">]</SPAN>
&nbsp;&nbsp;&nbsp; arcpy<SPAN class="punctuation token">.</SPAN>AddMessage<SPAN class="punctuation token">(</SPAN><SPAN class="string token">"lst_values={0}"</SPAN><SPAN class="punctuation token">.</SPAN>format<SPAN class="punctuation token">(</SPAN>lst_values<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp; arcpy<SPAN class="punctuation token">.</SPAN>AddMessage<SPAN class="punctuation token">(</SPAN><SPAN class="string token">"type of first element={0}"</SPAN><SPAN class="punctuation token">.</SPAN>format<SPAN class="punctuation token">(</SPAN>type<SPAN class="punctuation token">(</SPAN>lst_values<SPAN class="punctuation token">[</SPAN><SPAN class="number token">0</SPAN><SPAN class="punctuation token">]</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">)</SPAN>


&nbsp;&nbsp;&nbsp; lst_sea_level <SPAN class="operator token">=</SPAN> arcpy<SPAN class="punctuation token">.</SPAN>GetParameter<SPAN class="punctuation token">(</SPAN><SPAN class="number token">0</SPAN><SPAN class="punctuation token">)</SPAN>

&nbsp;&nbsp;&nbsp; arcpy<SPAN class="punctuation token">.</SPAN>AddMessage<SPAN class="punctuation token">(</SPAN><SPAN class="string token">"\nGetParameter(0)"</SPAN><SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp; arcpy<SPAN class="punctuation token">.</SPAN>AddMessage<SPAN class="punctuation token">(</SPAN><SPAN class="string token">"lst_sea_level={0}"</SPAN><SPAN class="punctuation token">.</SPAN>format<SPAN class="punctuation token">(</SPAN>lst_sea_level<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp; arcpy<SPAN class="punctuation token">.</SPAN>AddMessage<SPAN class="punctuation token">(</SPAN><SPAN class="string token">"type of first element={0}"</SPAN><SPAN class="punctuation token">.</SPAN>format<SPAN class="punctuation token">(</SPAN>type<SPAN class="punctuation token">(</SPAN>lst_sea_level<SPAN class="punctuation token">[</SPAN><SPAN class="number token">0</SPAN><SPAN class="punctuation token">]</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">)</SPAN>

<SPAN class="keyword token">if</SPAN> __name__ <SPAN class="operator token">==</SPAN> <SPAN class="string token">'__main__'</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp; main<SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="line-numbers-rows"><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN></SPAN>

In the first part it reads the parameter as text and you can see how it is processed to get a list of values. In the second part starting on line 19, I read the same parameter but now directly as a list without converting it to string. The result is this:

In your case it will be much easier to use GetParameter then using GetParameterAsText.

XanderBakker

In case the values are integers you can do this:

valuelist <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">[</SPAN>int<SPAN class="punctuation token">(</SPAN>x<SPAN class="punctuation token">.</SPAN>strip<SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">)</SPAN> <SPAN class="keyword token">for</SPAN> x <SPAN class="keyword token">in</SPAN> sea_level<SPAN class="punctuation token">.</SPAN>split<SPAN class="punctuation token">(</SPAN><SPAN class="string token">";"</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">]</SPAN><SPAN class="line-numbers-rows"><SPAN>‍</SPAN></SPAN>

stashavint

which variable do i change to int or float is it the valuelist or the value? and I am confused on how to do that

DanPatterson_Retired

another argument for using sys.argv instead...

XanderBakker

Your value is a string. You will need to convert it to make it numerical by using int or float.

DanPatterson_Retired

a multivalue parameter is often returned as a semi-colon delimited string as you have shown, however, I suspect you are only getting layer names and not paths to files which may be what is needed.

Perhaps you could throw in a few print/arcpy.AddMessage lines in so that you get some output from the tool to examine

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