ArcPy Project tool

Project_better.py

from arcpy import CreateFeatureclass_management, os, da, ListFields, Describe


def project_better(in_dataset, out_dataset, spatial_reference):
    # Script borrowed from http://joshwerts.com/blog/2015/09/10/arcpy-dot-project-in-memory-featureclass/
    # Can project a dataset and create the output in an 'in_memory' workspace

    path, name = os.path.split(out_dataset)
    CreateFeatureclass_management(
        path,
        name,
        Describe(in_dataset).shapeType,
        template=in_dataset,
        spatial_reference=spatial_reference,
    )

    fields = ["Shape@"] + [f.name for f in ListFields(in_dataset) if not f.required]

    with da.SearchCursor(in_dataset, fields, spatial_reference=spatial_reference) as source_curs, \
        da.InsertCursor(out_dataset, fields) as ins_curs:

        for row in source_curs:
            ins_curs.insertRow(row)