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Ticket #1793 #123

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c3e4bbb
moved import statement in npyio.py for ease of reading
pletnes Apr 4, 2011
7d27b3b
Merge https://github.com/numpy/numpy
pletnes Jul 28, 2011
ef3915a
Ticket #1793 patch: genfromtxt now returns an empty array if the input
pletnes Jul 28, 2011
abcbb6a
Added warning for empty files in genfromtxt (ticket 1793 related)
pletnes Jul 28, 2011
5f51e6a
Ticket 1793 related again - added filename to warning in case of empt…
pletnes Jul 28, 2011
559399d
Ticket 1793 again - removed use of the .format; using % operator inst…
pletnes Jul 29, 2011
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6 changes: 4 additions & 2 deletions numpy/lib/npyio.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1274,8 +1274,10 @@ def genfromtxt(fname, dtype=float, comments='#', delimiter=None,
first_line = asbytes('').join(first_line.split(comments)[1:])
first_values = split_line(first_line)
except StopIteration:
# might want to return empty array instead of raising error.
raise IOError('End-of-file reached before encountering data.')
# return an empty array if the datafile is empty
first_line = ''
first_values = []
warnings.warn('genfromtxt: Empty input file: "%s"' % fname)

# Should we take the first values as names ?
if names is True:
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5 changes: 2 additions & 3 deletions numpy/lib/tests/test_io.py
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Expand Up @@ -959,12 +959,11 @@ def test_usecols_with_named_columns(self):
usecols=('a', 'c'), **kwargs)
assert_equal(test, ctrl)


def test_empty_file(self):
"Test that an empty file raises the proper exception"
data = StringIO()
assert_raises(IOError, np.ndfromtxt, data)

test = np.genfromtxt(data)
assert_equal(test, np.array([]))

def test_fancy_dtype_alt(self):
"Check that a nested dtype isn't MIA"
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