Question: how to calculate difference between two columns in pandas?
Answer: df = pd. DataFrame(columns=["one", "two"])
df. one = ["2019-01-24","2019-01-27"]
df. one = pd. to_datetime(df. ... 
df. two = ["2019-01-28", "2020-01-29"]
df. two = pd. ... 
print(df)
difference = (df. two - df. ... 
print(difference)