how to declare an empty dataframe in python code example
Example 1: empty dataframe
newDF = pd.DataFrame()
newDF = newDF.append(oldDF, ignore_index = True)
print newDF.head()
Example 2: create empty pandas dataframe
df = pd.DataFrame(columns=['a', 'b', 'c'])
Example 3: append a dataframe to an empty dataframe
df = df.append(<dataframe_to_be_appended>)
Example 4: dataframe pandas empty
>>> df_empty = pd.DataFrame({'A' : []})
>>> df_empty
Empty DataFrame
Columns: [A]
Index: []
>>> df_empty.empty
True