def _reassign_jdf(target_df: DataFrame, new_df: DataFrame):
"""
Reassigns the java df contont of a dataframe.
"""
target_df._jdf = new_df._jdf
target_df._metadata = new_df._metadata
# Reset the cached variables
target_df._schema = None
target_df._lazy_rdd = None
def copy(self):
df = DataFrame(self._jdf, self.sql_ctx)
df._metadata = self._metadata.copy()
return df