Python Pandas, write DataFrame to fixed-width file (to_fwf?)

Question

I see that Pandas has read_fwf, but does it have something like DataFrame.to_fwf? I'm looking for support for field width, numerical precision, and string justification. It seems that DataFrame.to_csv doesn't do this. numpy.savetxt does, but I wouldn't want to do:

numpy.savetxt('myfile.txt', mydataframe.to_records(), fmt='some format')

That just seems wrong. Your ideas are much appreciated.

Answer 1

Until someone implements this in pandas, you can use the tabulate package:

import pandas as pd
from tabulate import tabulate

def to_fwf(df, fname):
    content = tabulate(df.values.tolist(), list(df.columns), tablefmt="plain")
    open(fname, "w").write(content)

pd.DataFrame.to_fwf = to_fwf