### Troubleshooting Python-Binance API Error Code 1013: Percent Price Issue

　　When working with the Python-Binance library to interact with the Binance API, developers may encounter various errors. One of the most common errors is the `APIError` with code `1013`, which is specifically related to the `percent_price` parameter. This article aims to provide a comprehensive guide on understanding and resolving this issue.

　　### Understanding the Error

　　The `APIError` with code `1013` typically occurs when the `percent_price` parameter is not set correctly. The `percent_price` parameter is used to specify the percentage change in price for a trade. If this parameter is not set properly, the API will return an error.

　　### Common Causes of the Error

　　1. **Incorrect Parameter Format**: The `percent_price` parameter should be a floating-point number between 0 and 100. For example, to represent a 1% change, you would use `0.01`.

　　2. **Missing Parameter**: If the `percent_price` parameter is not included in the API request, the error will occur.

　　3. **Invalid API Key**: Ensure that you are using a valid API key with the necessary permissions to perform the requested operation.

　　### Resolving the Error

　　To resolve the `APIError` with code `1013`, follow these steps:

　　1. **Check the Parameter Format**: Ensure that the `percent_price` parameter is a floating-point number between 0 and 100. For example, if you want to set a 1% change, use `percent_price=0.01`.

　　2. **Include the Parameter**: Make sure that the `percent_price` parameter is included in your API request. For example, in a limit order request, you would include it like this:

　　```python

　　from binance.client import Client

　　client = Client(api_key, api_secret)

　　order = client.create_order(symbol='BTCUSDT', side='BUY', type='LIMIT', quantity=0.01, price=50000, percent_price=0.01)

　　```

　　3. **Validate API Key**: Confirm that your API key is valid and has the necessary permissions. If you suspect that the API key is the issue, you can generate a new one from the Binance dashboard.

　　4. **Check API Limits**: Ensure that you are not exceeding any API rate limits. Binance has strict limits on the number of requests you can make in a given timeframe.

　　5. **Review API Documentation**: Always refer to the official Binance API documentation for the most up-to-date information on parameter requirements and usage.

　　### Example Code

　　Here is an example of how to correctly set the `percent_price` parameter in a Python-Binance API request:

　　```python

　　from binance.client import Client

　　client = Client(api_key, api_secret)

　　order = client.create_order(symbol='BTCUSDT', side='BUY', type='LIMIT', quantity=0.01, price=50000, percent_price=0.01)

　　print("Order placed successfully.")

　　```

　　In this example, the `percent_price` parameter is set to `0.01`, which represents a 1% change in price. The API request should be successful if all other parameters are correctly set.

　　### Conclusion

　　The `APIError` with code `1013` related to the `percent_price` parameter in the Python-Binance library can be resolved by ensuring the correct parameter format, including the parameter in the API request, validating the API key, checking API limits, and referring to the API documentation. By following these steps, developers can effectively troubleshoot and resolve this common issue.

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