ArcPy Select by Attribute: Selection Query error

[G_Fortress]

Hello, 

I keep receiving a 000358 error on my select by attribute function. I know it is the SQL in the selection query but I am so lost on what I should do to fix it. 

Essentially, the purpose of the script is to utilize the the names of school districts in the "SCHOOL_DIS" attribute column in a shape file, and preform a buffer around each individual district to produce its own shape file, so one school district buffer per shape file.

with arcpy.da.SearchCursor (input_shape, ["SCHOOL_DIS"]) as cursor:
     for row in cursor:
       district_name = row[0]
       selection_query = "SCHOOL_DIS = " + district_name
       arcpy.management.SelectLayerByAttribute (input_shape, "NEW_SELECTION", selection_query, "")    
       outputfile = os.path.join(path, "{}_buf_5mile.shp".format(district_name))
       arcpy.analysis.Buffer (input_shape, outputfile, "5 Miles", "","","","","")                                                     

[Luke_Pinner]

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[G_Fortress]

added

[DanPatterson]

Specifying a query in Python—ArcGIS Pro | Documentation

text would have to be enclosed by a single quote I think

district_name = "a"
"SCHOOL_DIS = '{}'".format(district_name)
"SCHOOL_DIS = 'a'"

but you had better check fhe fieldname delimiter syntax for your input source

Specifying a query in Python—ArcGIS Pro | Documentation