Creating new binary columns from single string column in pandas

You can do this easily with pd.get_dummies (docs):

In [37]: df = pd.DataFrame(['Slow', 'Normal', 'Fast', 'Slow'], columns=['Speed'])

In [38]: df
Out[38]:
    Speed
0    Slow
1  Normal
2    Fast
3    Slow

In [39]: pd.get_dummies(df['Speed'])
Out[39]:
   Fast  Normal  Slow
0     0       0     1
1     0       1     0
2     1       0     0
3     0       0     1

Here is one solution:

df['Normal'] = df.Speed.apply(lambda x: 1 if x == "Normal" else 0)
df['Slow'] = df.Speed.apply(lambda x: 1 if x == "Slow" else 0)
df['Fast'] = df.Speed.apply(lambda x: 1 if x == "Fast" else 0)