How to use 'pandas groupby count' in Python

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SpongebBob/tabular_automl_NNI

90 def crosscount(df, col_list):
91     """
92     tools for multy thread bi_count
93     """
94     assert isinstance(col_list, list)
95     assert len(col_list) &gt;= 2
96     name = "count_"+ '_'.join(col_list)
97     df[name] = df.groupby(col_list)[col_list[0]].transform('count')
98     return df

90	def crosscount(df, col_list):
91	"""
92	tools for multy thread bi_count
93	"""
94	assert isinstance(col_list, list)
95	assert len(col_list) >= 2
96	name = "count_"+ '_'.join(col_list)
97	df[name] = df.groupby(col_list)[col_list[0]].transform('count')
98	return df

How to use 'pandas groupby count' in Python

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