How do you iterate over a python panda data frame?
You can iterate over a pandas dataframe using the iterrows() method. Here's an example:

```
import pandas as pd

df = pd.DataFrame({'A': [1, 2, 3], 'B': [4, 5, 6], 'C': [7, 8, 9]})

for index, row in df.iterrows():
    print(index, row['A'], row['B'], row['C'])
```

Note that iterating over a dataframe using iterrows() can be slow for large datasets, as it returns a new pandas series for each row, which can be memory-intensive. In such cases, it may be more efficient to use vectorized operations, or to use the itertuples() method, which is faster but less flexible than iterrows().
a