Python 3.9.2 (tags/v3.9.2:1a79785, Feb 19 2021, 13:44:55) [MSC v.1928 64 bit (AMD64)] on win32 Type "help", "copyright", "credits" or "license" for more information. >>> print(req.content) Traceback (most recent call last): File "<stdin>", line 1, in <module> NameError: name 'req' is not defined
时间: 2023-07-21 17:05:52 浏览: 186
根据您提供的代码,出现了一个NameError错误,指示'req'未定义。这意味着在调用'req.content'之前,您没有定义'req'变量。
在您尝试打印'req.content'之前,请确保已经执行了发送HTTP请求的代码,并将其结果赋值给'req'变量。例如,使用`requests`库发送HTTP请求的代码示例如下:
```python
import requests
# 发送HTTP请求
req = requests.get('http://10.10.10.213/testhttp.php?username=admin&password=123456')
# 打印响应内容
print(req.content)
```
请注意,您需要确保已安装`requests`库。如果没有安装,可以使用以下命令进行安装:
```
pip install requests
```
请根据您的实际需求和代码逻辑进行相应地修改和调整。如果问题仍然存在,请提供更多的代码和错误信息,以便我们可以更详细地帮助您解决问题。
相关问题
Traceback (most recent call last): File "/home/bder73002/hpy/ConvNextV2_Demo/train+.py", line 275, in <module> train_loss, train_acc = train(model_ft, DEVICE, train_loader, optimizer, epoch,model_ema) File "/home/bder73002/hpy/ConvNextV2_Demo/train+.py", line 48, in train loss = torch.nan_to_num(criterion_train(output, targets)) # 计算loss File "/home/bder73002/anaconda3/envs/python3.9.2/lib/python3.9/site-packages/torch/nn/modules/module.py", line 889, in _call_impl result = self.forward(*input, **kwargs) File "/home/bder73002/hpy/ConvNextV2_Demo/models/losses.py", line 56, in forward focal_loss = self.focal_loss(x, target) File "/home/bder73002/anaconda3/envs/python3.9.2/lib/python3.9/site-packages/torch/nn/modules/module.py", line 889, in _call_impl result = self.forward(*input, **kwargs) File "/home/bder73002/hpy/ConvNextV2_Demo/models/losses.py", line 21, in forward return focal_loss(F.cross_entropy(input, target, reduction='none', weight=self.weight), self.gamma) File "/home/bder73002/anaconda3/envs/python3.9.2/lib/python3.9/site-packages/torch/nn/functional.py", line 2693, in cross_entropy return nll_loss(log_softmax(input, 1), target, weight, None, ignore_index, None, reduction) File "/home/bder73002/anaconda3/envs/python3.9.2/lib/python3.9/site-packages/torch/nn/functional.py", line 2388, in nll_loss ret = torch._C._nn.nll_loss(input, target, weight, _Reduction.get_enum(reduction), ignore_index) RuntimeError: Expected object of scalar type Long but got scalar type Float for argument #2 'target' in call to _thnn_nll_loss_forward
这个错误的原因是你的标签数据类型不一致。cross_entropy函数要求输入的target必须是Long类型的张量,但是你传入的target是Float类型的标量。你需要将标签转换为Long类型的张量。可以使用以下代码将标签转换为Long类型:
```python
targets = targets.long()
```
将其添加到你的代码中即可。
Fatal error in launcher: Unable to create process using '"d:\python 3.9.2\python.exe" "D:\Python 3.9.2\Scripts\pytest.exe" ': ???????????
这个错误提示意味着Python解释器无法启动pytest.exe。这可能是由于多种原因引起的,例如Python解释器或pytest.exe文件路径错误,或者是由于系统环境变量配置不正确导致的。解决此问题的方法可能因情况而异,但以下是一些可能有用的步骤:
1. 确认Python解释器和pytest.exe文件的路径是否正确,并且文件是否存在。
2. 检查系统环境变量是否正确配置。可以尝试在命令提示符中运行“python”和“pytest”命令,以查看是否能够正常启动Python解释器和pytest。
3. 尝试重新安装Python和pytest,并确保在安装过程中选择正确的选项。
4. 如果您使用的是虚拟环境,请确保已正确激活虚拟环境。
5. 如果您使用的是Windows操作系统,请尝试以管理员身份运行命令提示符,并重新运行命令。
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