python - How to change a .csv file to .dat file using pandas? -


for example, csv file looks this: csv content. how change .dat file using '|':

a 1|b 2|c 3|d 4|...
2|b 3|c 4|d 5|...
3|b 4|c 5|d 6|...
...

consider dataframe df

df = pd.dataframe([     [1, 2, 3, 4],     [2, 3, 4, 5],     [3, 4, 5, 6] ], columns=list('abcd'))      b  c  d 0  1  2  3  4 1  2  3  4  5 2  3  4  5  6

iiuc

df.astype(str).radd(     df.columns.to_series() + ' ' ).to_csv('test.data', header=none, index=none, sep='|') 
cat test.data  1|b 2|c 3|d 4 2|b 3|c 4|d 5 3|b 4|c 5|d 6

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