Examples

import numpy as np
import pandas as pd

df = pd.DataFrame({'c1': [2, 3], 'c2': [4, 5]})
df.shape

(2, 2)

df = pd.DataFrame({'c1': [2, 3], 'c2': [4, 5],
                   'c3': [6, 7]})
df.shape

(2, 3)