get lenght of a column pandas code example

Example 1: pandas create a column from index

df.reset_index(level=0, inplace=True)

Example 2: get column number in dataframe pandas

# PANDAS: get column number from colomn name
dataframe.columns.get_loc("<col_name>")

Example 3: pd dataframe get column names

lst = data.columns.values     # data is dataframe