create empty pandas dataframe

df = pd.DataFrame(columns=['a', 'b', 'c'])

column_names = ["a", "b", "c"]
df = pd.DataFrame(columns = column_names)

import pandas as pd
df = pd.DataFrame(columns=['A','B','C','D','E','F','G'])

>>> df_empty = pd.DataFrame({'A' : []})
>>> df_empty
Empty DataFrame
Columns: [A]
Index: []
>>> df_empty.empty
True

import pandas as pd

data = [[0, 0, 0] , [1, 1, 1]]
columns = ['A', 'B', 'C']
df = pd.DataFrame(data, columns=columns)