BUG: Issue with converter function in loadtxt() #22007
Description
Describe the issue:
Passing a single converter function as an argument to the loadtxt function results in an error. The attached code example is from the numpy documentation.
Reproduce the code example:
import numpy
from io import StringIO
s = StringIO('10.01 31.25-\n19.22 64.31\n17.57- 63.94')
def conv(fld):
return -float(fld[:-1]) if fld.endswith(b'-') else float(fld)
a = numpy.loadtxt(s, converters=conv)Error message:
---------------------------------------------------------------------------
AttributeError Traceback (most recent call last)
<ipython-input-11-6ec83d448f1e> in <module>()
4 return -float(fld[:-1]) if fld.endswith(b'-') else float(fld)
5
----> 6 a = numpy.loadtxt(s, converters=conv)
/usr/local/lib/python3.7/dist-packages/numpy/lib/npyio.py in loadtxt(fname, dtype, comments, delimiter, converters, skiprows, usecols, unpack, ndmin, encoding, max_rows, like)
1119
1120 # By preference, use the converters specified by the user
-> 1121 for i, conv in (user_converters or {}).items():
1122 if usecols:
1123 try:
AttributeError: 'function' object has no attribute 'items'NumPy/Python version information:
1.21.6 3.7.13 (default, Apr 24 2022, 01:04:09)
[GCC 7.5.0]