Python中的索引越界

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1 回答

520 浏览

提问于 2025-04-17 16:30

我正在尝试对一个Excel文件进行索引，我使用了whoosh这个包，但我遇到了一个错误，提示列表索引超出范围。
请问有没有人能帮我？
我的代码是：

from whoosh import fields, index
import os.path
import csv
import codecs

# This list associates a name with each position in a row
columns = ["juza","chapter","verse","analysis"]

schema = fields.Schema(juza=fields.NUMERIC,
                       chapter=fields.NUMERIC,
                       verse=fields.NUMERIC,
                       analysis=fields.KEYWORD)


# Create the Whoosh index
indexname = "index"
if not os.path.exists(indexname):
  os.mkdir(indexname)
ix = index.create_in(indexname, schema)

# Open a writer for the index
with ix.writer() as writer:
  # Open the CSV file
  with codecs.open("yom.csv", "rb","utf8") as csvfile:
    # Create a csv reader object for the file
    csvreader = csv.reader(csvfile)

    # Read each row in the file
    for row in csvreader:

      # Create a dictionary to hold the document values for this row
      doc = {}

      # Read the values for the row enumerated like
      # (0, "juza"), (1, "chapter"), etc.
      for colnum, value in enumerate(row):

        # Get the field name from the "columns" list
        fieldname = columns[colnum]

        # Strip any whitespace and convert to unicode
        # NOTE: you need to pass the right encoding here!
        value = unicode(value.strip(), "utf-8")

        # Put the value in the dictionary
        doc[fieldname] = value

      # Pass the dictionary to the add_document method
      writer.add_document(**doc)
    writer.commit()
`

然后我得到了这个错误，我不知道为什么？
错误信息：

Traceback (most recent call last):
  File "C:\Python27\yarab.py", line 39, in <module>
    fieldname = columns[colnum]
IndexError: list index out of range

还有我的csv文件：

1   3   1   Al+ POS:ADJ LEM:r~aHoma`n ROOT:rHm MS GEN
1   3   2   Al+ POS:ADJ LEM:r~aHiym ROOT:rHm MS GEN
1   4   1   POS:N ACT PCPL LEM:ma`lik ROOT:mlk M GEN
1   4   2   POS:N LEM:yawom ROOT:ywm M GEN
1   4   3   Al+ POS:N LEM:diyn ROOT:dyn M GEN
1   5   1   POS:PRON LEM:&lt;iy~aA 2MS

1 个回答

csv.reader 默认使用逗号 , 作为分隔符。

你需要明确指定你的分隔符：

csvreader = csv.reader(csvfile, delimiter=...)

不过，你的CSV文件可能格式不统一。直接用其他方法读取会更好，而不是用 csv：

columns = ["juza","chapter","verse","analysis"]
with codecs.open("yom.csv", "rb","utf8") as f:
    for line in f:
        a, b, c, rest = line.split('   ', 3)
        doc = {k:v.strip() for k,v in zip(columns, rest.split(':'))}
        # a,b,c are the first three integers
        # doc is a dictionary

回答于 2025-04-17 由 Python大师

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Python中的索引越界

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