Python中的“IOError：[Errno 0] Error”錯誤

Question

我有一個腳本應該附加到文件的東西，但它引發了一個我不理解的錯誤，不知道它是如何被觸發的。

這是代碼：

import re

num_words = "four kiddiewinks|four children|four kids"
words_list = num_words.split('|')

def append_2synonym(words_list, num_words):
    with open('test2 words.txt', 'a+') as f:
        read_f = f.read()
        patt = r'^' + words_list[0] + '\|'
        result = re.search(patt, read_f, re.MULTILINE)
        if result == None:
            f.write("\n" + num_words)
        else:
            print "\nNo match found in '2 words.txt' file"

append_2synonym(words_list, num_words)

這是'test2 words.txt'文件的內容：

five kiddiewinks|five kids|five children
mobile phone|cell phone|cellular phone
stinky cheese|smelly cheese

這是我得到的完整錯誤：

Traceback (most recent call last):
  File "D:\Magic Briefcase\My Python Scripts\Spin Scripts\synonyms\testing2.py", line 16, in <module>
    append_2synonym(words_list, num_words)
  File "D:\Magic Briefcase\My Python Scripts\Spin Scripts\synonyms\testing2.py", line 12, in append_2synonym
    f.write("\n" + num_words)
IOError: [Errno 0] Error
[Finished in 0.1s with exit code 1]

Answer 1

引用Python文件操作的答案，當在Windows上進行讀寫切換時，必須有介入的fflush，fsetpos，fseek或倒帶操作。

這是一個可能的解決方案：

import re

num_words = "four kiddiewinks|four children|four kids"
words_list = num_words.split('|')

def append_2synonym(words_list, num_words):
    with open('test2 words.txt', 'a+') as f:
        read_f = f.read()
        patt = r'^' + words_list[0] + '\|'
        result = re.search(patt, read_f, re.MULTILINE)
        if result == None:
            f.seek(0,2) # change is here !!
            f.write("\n" + num_words)
        else:
            print "\nNo match found in '2 words.txt' file"

append_2synonym(words_list, num_words)

在f.seek(0,2) ， 2是from_what參數。 from_what值為0從文件開頭開始， 1使用當前文件位置， 2使用文件末尾作為參考點。 from_what可以省略，默認為0 ，使用文件的開頭作為參考點。