Dear all,
I’m having a problem writing an array with np.savetxt, see below.
(python3.5, numpy 1.10.1)
import numpy as np
a=np.ones(5,dtype=int)
np.savetxt('t.txt',a)
Works fine, but the content of ’t.txt’ is overwritten.
But, passing file handle gives an error, while it works fine on python2.7 !
with open('t.txt','w') as t:
np.savetxt(t,a,fmt='%i')
...:
---------------------------------------------------------------------------
TypeError Traceback (most recent call last)
/Users/may/anaconda/lib/python3.5/site-packages/numpy/lib/npyio.py in
savetxt(fname, X, fmt, delimiter, newline, header, footer, comments)
1155 try:
-> 1156 fh.write(asbytes(format % tuple(row) + newline))
1157 except TypeError:
TypeError: write() argument must be str, not bytes
During handling of the above exception, another exception occurred:
TypeError Traceback (most recent call last)
<ipython-input-4-cce5156eb1e6> in <module>()
1 with open('t.txt','w') as t:
----> 2 np.savetxt(t,a,fmt='%i')
3
/Users/may/anaconda/lib/python3.5/site-packages/numpy/lib/npyio.py in
savetxt(fname, X, fmt, delimiter, newline, header, footer, comments)
1158 raise TypeError("Mismatch between array dtype ('%s')
and "
1159 "format specifier ('%s')"
-> 1160 % (str(X.dtype), format))
1161 if len(footer) > 0:
1162 footer = footer.replace('\n', '\n' + comments)
TypeError: Mismatch between array dtype ('int64') and format specifier ('%i’)
Best,
Dr. Maxim Mayzel
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