class AudioReader(object): ''' Class that reads Wav format files Input as a different scp file address Output a matrix of wav files in all scp files. ''' def __init__(self, scp_path, sample_rate=8000): super(AudioReader, self).__init__() self.sample_rate = sample_rate self.index_dict = handle_scp(scp_path) self.keys = list(self.index_dict.keys()) def _load(self, key): src, sr = read_wav(self.index_dict[key], return_rate=True) if self.sample_rate is not None and sr != self.sample_rate: raise RuntimeError('SampleRate mismatch: {:d} vs {:d}'.format( sr, self.sample_rate)) return src def __len__(self): return len(self.keys) def __iter__(self): for key in self.keys: yield key, self._load(key) def __getitem__(self, index): if type(index) not in [int, str]: raise IndexError('Unsupported index type: {}'.format(type(index))) if type(index) == int: num_uttrs = len(self.keys) if num_uttrs < index and index < 0: raise KeyError('Interger index out of range, {:d} vs {:d}'.format( index, num_uttrs)) index = self.keys[index] if index not in self.index_dict: raise KeyError("Missing utterance {}!".format(index)) return self._load(index)
时间: 2024-02-14 08:21:51 浏览: 27
这段代码定义了一个 AudioReader 类,用于读取多个 wav 格式的音频文件。构造函数的参数为一个 scp 文件的路径和采样率,默认为 8000。类中定义了 `_load` 函数来读取每个 wav 文件,并进行采样率匹配。另外,类还实现了 `__len__`、`__iter__` 和 `__getitem__` 等函数,以支持对音频文件的遍历和索引访问。
相关问题
Write a program that reads an expression in a line as input and prints out the result. Only integers and operators below are allowed in the expression:
Sure, I can help you with that! Here is a Python code snippet that can evaluate simple arithmetic expressions containing only integers and the operators +, -, *, and /:
```python
expression = input("Enter an arithmetic expression: ")
result = eval(expression)
print("Result:", result)
```
You can copy and paste this code into a Python IDE or a Jupyter notebook and execute it. When prompted, enter an arithmetic expression like "2+3*4" and press Enter. The program will then evaluate the expression and print out the result, which in this case should be 14.
Note that the `eval()` function is used to evaluate the expression entered by the user as a Python expression. This means that the user can potentially enter any valid Python expression, so you should be careful when using this function in a production environment.
Write a C++ program that implements flipping the contents of each line of a string in a text file and outputs the flipped result to another text file. Both the input file name and output file name are specified by the user.
Sure, here's an implementation of the program you described:
```cpp
#include <iostream>
#include <fstream>
#include <string>
#include <algorithm>
int main()
{
std::string input_filename, output_filename;
std::cout << "Enter input file name: ";
std::cin >> input_filename;
std::cout << "Enter output file name: ";
std::cin >> output_filename;
std::ifstream input_file(input_filename);
if (!input_file.is_open())
{
std::cerr << "Failed to open input file: " << input_filename << std::endl;
return 1;
}
std::ofstream output_file(output_filename);
if (!output_file.is_open())
{
std::cerr << "Failed to open output file: " << output_filename << std::endl;
return 1;
}
std::string line;
while (std::getline(input_file, line))
{
std::reverse(line.begin(), line.end());
output_file << line << std::endl;
}
std::cout << "Done!" << std::endl;
return 0;
}
```
Here's how it works:
1. The user is prompted to enter the input and output file names.
2. The program attempts to open the input and output files for reading and writing, respectively. If either operation fails, an error message is printed and the program exits with an error code.
3. The program reads each line from the input file, reverses the order of its characters, and writes the result to the output file.
4. When all lines have been processed, the program prints a "Done!" message and exits with a success code.
Note that this implementation assumes that the input file exists and is readable, and that the output file can be created or overwritten as needed. It also assumes that each line in the input file is terminated by a newline character, and that the output file should have the same newline format. If these assumptions do not hold, the program may produce unexpected results.