join 2 columns in python code example

Example 1: python merge strings in columns

df["period"] = df["Year"].astype(str) + df["quarter"]

Example 2: concat pandas python

>>> s1 = pd.Series(['a', 'b'])
>>> s2 = pd.Series(['c', 'd'])
>>> pd.concat([s1, s2])
0    a
1    b
0    c
1    d
dtype: object

Example 3: how to merge two column pandas

DataFrame["new_column"] = DataFrame["column1"] + DataFrame["column2"]