Lineterminator使用熊猫给额外的行

时间:2020-10-12 09:47:22

标签: python pandas text-files line terminator

我认为使用熊猫从文本文件读取数据时使用行终止符存在问题。它在NaN列的末尾给出了不需要的行。我的数据有12行和一个标头,但是使用提供的代码,它会产生13行和一个标头。如何获取正确的数据。

使用

将数据写入文本文件
with open(filepath, 'a', newline='') as filey: 
    csv_writer = csv.writer(filey, delimiter = '\t', lineterminator='\r\n')

代码

import pandas as pd


path_to_results = r"C:\\...\\Desktop\\Results\\_results.txt"
data = pd.read_csv(path_to_results,sep='\t',lineterminator='\r')
data = pd.DataFrame(data)

#print(data.head())
print(data["Vi_V"])
print(data["mass_g"])

使用Lineterminator \ r:

Name: Vi_V, dtype: object
0     0.24
1     0.47
...
11    3.66
12     NaN

使用Lineterminator \ r \ n:

回溯(最近通话最近一次):

  File "c:/Users.../g_00.py", line 5, in <module>
    data = pd.read_csv(path_to_results,sep='\t',lineterminator='\r\n')
  File "C:...\AppData\Local\Programs\Python\Python37\lib\site-packages\pandas\io\parsers.py", line 676, in parser_f
    return _read(filepath_or_buffer, kwds)
  File "C:...\AppData\Local\Programs\Python\Python37\lib\site-packages\pandas\io\parsers.py", line 448, in _read
    parser = TextFileReader(fp_or_buf, **kwds)
  File "C:...\AppData\Local\Programs\Python\Python37\lib\site-packages\pandas\io\parsers.py", line 880, in __init__
    self._make_engine(self.engine)
  File "C:...\AppData\Local\Programs\Python\Python37\lib\site-packages\pandas\io\parsers.py", line 1114, in _make_engine
    self._engine = CParserWrapper(self.f, **self.options)
  File "C:...\AppData\Local\Programs\Python\Python37\lib\site-packages\pandas\io\parsers.py", line 1891, in __init__
    self._reader = parsers.TextReader(src, **kwds)
  File "pandas\_libs\parsers.pyx", line 395, in pandas._libs.parsers.TextReader.__cinit__
ValueError: Only length-1 line terminators supported

1 个答案:

答案 0 :(得分:0)

dee cue在评论中给出了答案: “您是否尝试过省略行终止符参数?请尝试查看Windows上的python是否自动将新行读取为\ r \ n。– dee cue 10月12日10:01” 有效。