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在Python中写入和读取临时文件时出现EmptyDataError

[英]EmptyDataError while writing and reading from temporary file in Python

I am converting one file format into another file format by creating a temporary intermediate file. 我正在通过创建临时中间文件将一种文件格式转换为另一种文件格式。 Following are my codes: 以下是我的代码:

import tempfile
import pandas as pd
from pandas import DataFrame
def convert_binary_step1(file1,file2,file3):
   source=open(file1)
   SampleList=convert_file_to_list(file2)
   dest=open(file3,'w')
   ti= tempfile.NamedTemporaryFile(delete=False)
   l=[]    
   for line in source:
      a=line.split()
      del a[-1]
      for i in range(len(SampleList)):
          if SampleList[i] in a:
                 l.append("1")
          else:
                 l.append("0")
     data=a[0]+"\t"+"\t".join(l)+"\n"
     ti.write(data.encode("utf-8"))
     del l[:]
  source1=pd.read_csv(ti,sep="\t",encoding='utf-8',header=None)
  dest=source1.transpose()
  dest.to_csv(file3,sep="\t",header=None,index=None)
  source.close()
  dest.close()
  ti.close()
def convert_file_to_list(file2):
  source11=open(file2)
  li=[]
  for lin in source11:
      b=lin.split()
      li+=[b[0]]
  return li
  source11.close()

However, codes are generating the error- EmptyDataError: No columns to parse from file . 但是,代码正在生成错误-EmptyDataError:没有要从file解析的列

试试这个-它会返回到文件的顶部:

file.seek(0)

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