Windows10环境下TensorFlow目标检测教程运行报错（模型下载缩进错误）

Hey there, let's sort out that indentation error you're hitting while downloading the model for the TensorFlow object detection tutorial! That IndentationError is Python's way of telling you a line of code should be nested inside a block (like a loop or conditional) but isn't properly indented.

What's causing this? #

The line file_name = os.path.basename(file.name) (line 6 in your error trace) is supposed to be part of a loop block—specifically, it needs to be indented under the for file in tar_file.getmembers(): line that comes right before it. Right now, it's at the same indentation level as that loop, which Python doesn't allow.

Step-by-step fix: #

1. Locate the problematic code block in your Jupyter Notebook cell (the one labeled ipython-input-5-afc84e8d6c88). The broken version might look like this:

   tar_file = tarfile.open(MODEL_FILE)
   for file in tar_file.getmembers():
   file_name = os.path.basename(file.name)
       if 'frozen_inference_graph.pb' in file_name:
           tar_file.extract(file, os.getcwd())
   

2. Fix the indentation so the file_name = ... line is nested under the for loop. Use consistent indentation (either 4 spaces per level, or a single tab—never mix the two!). The corrected code should look like this:

   tar_file = tarfile.open(MODEL_FILE)
   for file in tar_file.getmembers():
       file_name = os.path.basename(file.name)
       if 'frozen_inference_graph.pb' in file_name:
           tar_file.extract(file, os.getcwd())
   

3. Check for consistency: Double-check that all lines inside the for loop are indented the same amount. Jupyter Notebook's auto-indent can help here—just press Tab after the for line to start the nested block properly.
4. Re-run the cell: Once the indentation is fixed, execute the cell again. The model download should proceed without the indentation error.

A quick heads-up: Sometimes copying code from external sources can introduce weird, non-standard spacing (like non-breaking spaces). If you still run into issues after fixing the structure, try manually re-typing the indented lines to ensure clean, valid indentation.

内容的提问来源于stack exchange，提问作者Houssem Khatrchi