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"""Converts numbers to strings"""
from h2oaicore.transformer_utils import CustomTransformer
import datatable as dt
import numpy as np
class MyToStringTransformer(CustomTransformer):
_numeric_output = False
def display_name(self):
return "Str"
def get_default_properties():
return dict(col_type="numeric", min_cols=1, max_cols=1, relative_importance=1)
def fit_transform(self, X: dt.Frame, y: np.array = None):
return self.transform(X)
def transform(self, X: dt.Frame):
return X.to_pandas().astype(str).apply(lambda x: "str_" + x)
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