Try the display max_columns setting as follows:
import pandas as pd
from IPython.display import display
df = pd.read_csv("some_data.csv")
pd.options.display.max_columns = None
display(df)
Or
pd.set_option('display.max_columns', None)
Edit: Pandas 0.11.0 backwards
This is deprecated but in versions of Pandas older than 0.11.0 the max_columns
setting is specified as follows:
pd.set_printoptions(max_columns=500)