pandas 遍历行和列

遍历行

1. iterrows

for i,r in df_train.iterrows():
    print(r['company'])

3. itertuples（速度快）

for r in df_train.itertuples():
    print(getattr(r, "company"))
    break

遍历列

1. iteritems

for i, r in df_train.iteritems():
    print(i, r)