how to create python empty dataframe where df.empty results in True

Question

How can I create an empty dataframe in python such that the test df.empty results True?

I tried this:

df = pd.DataFrame(np.empty((1, 1)))

and df.empty results in False.

Answer 1

The simplest is pd.DataFrame():

df = pd.DataFrame()   

df.empty
# True

If you want create a data frame of specify number of columns:

df = pd.DataFrame(columns=['A', 'B'])

df.empty
# True

Besides, an array of shape (1, 1) is not empty (it has one row), which is the reason you get empty = False, in order to create an empty array, it needs to be of shape (0, n):

df = pd.DataFrame(pd.np.empty((0, 3)))

df.empty
# True