add tow columns into 1 pandas series code example
Example 1: python merge strings in columns
df["period"] = df["Year"].astype(str) + df["quarter"]
Example 2: add two column values of a datframe into one
df["period"] = df["Year"] + df["quarter"]
df["period"] = df["Year"].astype(str) + df["quarter"]
df["period"] = df["Year"] + df["quarter"]