IO錯誤：[錯誤22]無效參數的Python寫

Question

我寫網絡共享，這是一段代碼，寫

while not created: 
    fileName = ''.join(random.choice(CANDIDATE_CHARS) for x in range(len)) 
    fullPath = os.path.join(base, fileName) 
    if not os.path.exists(fullPath): 
     filesize = random.randint(fileSizeLowerLim, fileSizeUpperLim) 
     logger.info("Creating file %s, with size %d" %(fullPath, filesize)) 
     with open(fullPath, 'wb') as fout: 
      if filesize > 0: 
       fout.write(os.urandom(filesize * 1048576)) 
       sizeLimit -= filesize 
     allFiles.append(fullPath) 
     created = True 
logger.info("Created file %s, now limit is %d" %(fullPath, sizeLimit)) 

而且我得到這個錯誤：

fout.write(os.urandom(filesize * 1048576)) 
    IOError: [Errno 22] Invalid argument 
    job remoteMachine finished ended with rc = 1 
    remoteMachine finished and it failed 

當我看着它生成的文件，但沒有數據。有沒有我在Python中錯過的東西？

我在使用32位python的Windows 7上運行腳本。

Answer 1

我懷疑你的「隨機」緩衝區超過64MB，因此命中Windows operating system limit，當writing to a network share時，它也有類似的影響。