from numpy array to csv - rounding

[snippsat]

Take into Pandas the can use .to_csv with float_format.

import numpy as np
import pandas as pd

arr_rand = np.random.rand(3,4)
df = pd.DataFrame(arr_rand)

>>> df
          0         1         2         3
0  0.440761  0.337663  0.372010  0.892344
1  0.952017  0.747404  0.787696  0.338794
2  0.690075  0.061731  0.541146  0.968825

>>> print(df.to_csv(index=False, header=False, line_terminator='\n', float_format='%.3f').strip())
0.441,0.338,0.372,0.892
0.952,0.747,0.788,0.339
0.690,0.062,0.541,0.969