How to sum rows and columns on a Pandas DataFrame using Python

# to work with dataframe
import pandas as pd

# We create our sample dataset with negative covariance
df = pd.DataFrame({"col1": range(10),
                   "col2": range(10)})

# Summing two columns
df["sum"] = df["col1"] + df["col2"]

# We check
print(df["sum"])

# to work with dataframe
import pandas as pd

# We create our sample dataset with negative covariance
df = pd.DataFrame({"col1": range(10),
                   "col2": range(10)})

# Summing all columns using the dataframe method
df["sum"] = df.sum(axis=1)

# We check
print(df["sum"])