### How to efficiently parse fixed width files with Python?

Sometimes, we want to efficiently parse fixed width files with Python.

In this article, we’ll look at how to efficiently parse fixed width files with Python.

### How to efficiently parse fixed width files with Python?

To efficiently parse fixed width files with Python, we can use the Pandas’ `read_fwf` method.

For instance, we write

``````import pandas as pd

path = 'filename.txt'

col_specification = [(0, 20), (21, 30), (31, 50), (51, 100)]
to define the `col_specification` list with the column specifications for filename.txt.
Then we call `read.fwf` with the `path` and the `colspecs` argument set to `col_specification ` to parse the fixed with file into a data frame.
To efficiently parse fixed width files with Python, we can use the Pandas’ `read_fwf` method.