TypeError：文本读取控制字符必须是单个 unicode 字符或无答案

【问题标题】：TypeError: Text reading control character must be a single unicode character or NoneTypeError：文本读取控制字符必须是单个 unicode 字符或无
【发布时间】：2022-11-11 19:03:52
【问题描述】：

从分隔符中包含多个字符的文件加载时，使用 numpy.loadtxt 和 numpy==1.23.4 会引发 TypeError：

from io import StringIO
import numpy as np

csv_file = StringIO("""1, 2
3, 4
5, 6
""")

print(np.loadtxt(csv_file, delimiter=", "))

Traceback (most recent call last):
  File "/home/hayesall/Teaching/questions/nploadtxt/testing.py", line 9, in <module>
    print(np.loadtxt(csv_file, delimiter=", "))
  File "/home/hayesall/miniconda3/envs/timeseries/lib/python3.10/site-packages/numpy/lib/npyio.py", line 1318, in loadtxt
    arr = _read(fname, dtype=dtype, comment=comment, delimiter=delimiter,
  File "/home/hayesall/miniconda3/envs/timeseries/lib/python3.10/site-packages/numpy/lib/npyio.py", line 979, in _read
    arr = _load_from_filelike(
TypeError: Text reading control character must be a single unicode character or None; but got: ', '

对于numpy==1.22.4，这似乎不会发生：

[[1. 2.]
 [3. 4.]
 [5. 6.]]

【问题讨论】：

标签： python numpy

【解决方案1】：

loadfromtxtappears to have been rewritten 在1.22 和1.23 之间。

一种解决方法是将np.loadtxt 替换为np.genfromtxt：

from io import StringIO
import numpy as np

csv_file = StringIO("""1, 2
3, 4
5, 6
""")

print(np.genfromtxt(csv_file, delimiter=", "))

【讨论】：