我收到此错误：[Errno 21] 是一个目录：

如何解决我收到此错误：[Errno 21] 是一个目录：

# Save directory path in 'path'
path = r'---path '

# Declare a dummy Numpy array (row vector)
result_array = np.empty([1,54])

# Create a list of audio file names 'file_list'
file_list = os.listdir(path)

i=0

for filename in file_list:
    
    # Read WAV file. 'rosa.core.load' returns sampling frequency in 'fs' and audio signal in 'sig'
    sig,fs = rosa.core.load(path + '\\' + file_list[i],sr=None)
    
    # Calculate the average mfcc (utterance-level features) using 'rosa.feat.mfcc()' and 'np.mean' method. '.T' transposes the rows and columns. 'axis=0' indicates average is calculated column-wise
    avg_mfcc_feat = np.mean(rosa.feature.mfcc(y=sig,sr=fs,n_mfcc=26).T,axis=0)
    
    # Calculate the standard deviation of mfcc (utterance-level features) using 'rosa.feat.mfcc()' and 'np.std' method. '.T' transposes the rows and columns. 'axis=0' indicates average is calculated column-wise
    std_mfcc_feat = np.std(rosa.feature.mfcc(y=sig,axis=0)
    
    # Calculate the average zero crossing rate (utterance-level feature) using 'rosa.feat.zero_crossing_rate()' and 'np.mean' method. '.T' transposes the rows and columns. 'axis=0' indicates average is calculated column-wise
    zcross_feat = rosa.feature.zero_crossing_rate(sig)
    avg_zcross_feat = np.mean(rosa.feature.zero_crossing_rate(y=sig).T,axis=0)
    
    # Append the three 1D arrays into a single 1D array called 'feat'.
    feat0 = np.append(avg_mfcc_feat,std_mfcc_feat,axis=0)
    
    feat1 = np.append(feat0,avg_zcross_feat,axis=0)
    
    # Save emotion label from file name. 'path' contains directory's address,'file_list' contains file name,and '\\' joins the two to form file's address
    label = os.path.splitext(os.path.basename(path + '\\' + file_list[i]))[0].split('-')[2]
    
    # Create a new Numpy array 'sample' to store features along with label
    sample = np.insert(feat1,obj=53,values=label)
    
    result_array = np.append(result_array,sample)
    
    i+=1

# Print out the 1D Numpy array
result_array

我在尝试读取内容并遍历 Ravdess 数据集的子目录时遇到此错误。有人能告诉我我做错了什么吗？任何帮助深表感谢。谢谢！

解决方法

1. os.listdir() 列出目录的条目，即它包含的文件和目录。如果要递归包含 path 下的所有文件和文件夹，请使用 os.walk()。

要仅使用来自 os.listdir() 的文件，请添加带有 os.path.isfile() 的检查：

如果 path 是一个 existing 常规文件，则返回 True。这遵循符号链接，因此对于同一路径，islink() 和 isfile() 都可以为真。

for filename in file_list:
    if not os.path.isfile(os.path.join(path,filename)):
        # not a file,skip it
        continue
    # rest of your code here
    sig,fs = rosa.core.load(...)
    ...

2. 在 for 循环内，您有两种情况在其中放置了 path + '\\' + file_list[i] - 这应该只是 path + '\\' + filename，或者更好os.path.join(path,filename)。

• 如果您需要文件名迭代的索引，请执行 for i,filename in enumerate(file_list): 而不是手动递增 i。
• 而不是多次重复 os.path.join(path,filename)，而是在循环开始时将其放入一个变量中：

  for filename in file_list:
      filepath = os.path.join(path,filename)
      if not os.path.isfile(filepath):
          continue
  
      sig,fs = rosa.core.load(filepath,sr=None)
      ...