3 examples of 'create empty dataframe in python' in Python

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38def fill_empty(df: pd.DataFrame) -> pd.DataFrame:
39 """Fill the gaps in the 'original' column with values from 'index'
40 Args:
41 df:
42 Returns:
43 """
44 index = df["original"].isnull()
45 df.loc[index, "original"] = df.loc[index, "index"]
46
47 return df
562def get_empty_results_frame():
563
564 results_columns = ['file_name',
565 'nRoundedTimeDuplicatesRemoved',
566 'cgmPercentDuplicated',
567 'gte40_lt70',
568 'gte70_lte180',
569 'gt180_lte400',
570 'lt-1',
571 'gte-1_lte1',
572 'gt1']
573
574 for num in range(10):
575 results_columns.append("cond" + str(num))
576
577 for num in range(9):
578 # Append snapshot locations to dataframe
579 results_columns.append("cond"+str(num+1)+"_eval_time")
580
581 results_frame = pd.DataFrame(index=[0], columns=results_columns)
582
583 return results_frame
56@staticmethod
57def make_default_dataframe():
58 return pd.DataFrame(np.random.randint(0, 10, size=(10, 3)), columns=list('ABC'))

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