gistfile1.txt

train = pd.read_csv("train.csv")
test = pd.read_csv("test.csv")

train_size = train.shape[0]

# extract label column before concatenating train and test
labels = train["Survived"]
train.drop("Survived", axis=1, inplace=True)

# concat train and test
all = pd.concat([train, test])

# preprocess features here
# ...
#

# split all into train and test

train = all.iloc[:train_size]
test = all.iloc[train_size:]