无法实现检查函数：执行时返回TypeError: tuple indices must be integers or slices, not str错误求助

Let's break down exactly what's going on here. That error message is telling you a clear problem: you're trying to use a string (like 'qnts') to index a tuple, but tuples only accept integers or slices as indices—they don't support key-based access like dictionaries do.

Looking at your code, the root issue is how you're handling the return value of load_data:

data1 = load_data('gm_2020.npz')
qtty1 = data1['qnts']  # This line fails because data1 is a tuple, not a dictionary

Why this happens #

You assumed load_data returns a dictionary (where you can use key names to pull values), but it's actually returning a tuple. Tuples are ordered, position-based collections, so string keys won't work here.

How to fix it #

First, let's confirm the type of data you're getting. Add these quick debug lines to your code to verify:

data1 = load_data('gm_2020.npz')
print(type(data1))  # This will print <class 'tuple'> if our hunch is correct
print(data1)        # This shows you the order of elements in the tuple

Once you know the tuple's element order, you have two clean solutions:

1. Unpack the tuple directly (most readable approach):
   If load_data returns values in the order (qnts, models), rewrite your variable assignments to unpack the tuple immediately:

   def sel_models():
       # Unpack the tuple returned by load_data to get your variables directly
       qtty1, dcng1 = load_data('gm_2020.npz')
       qtty2, dcng2 = load_data('gm_2021.npz')
       
       mask20 = (dcng1 == 'Damas') | (dcng1 == 'Cobalt') | (dcng1 == 'Nexia') | (dcng1 == 'Gentra')
       mask21 = (dcng2 == 'Damas') | (dcng2 == 'Cobalt') | (dcng2 == 'Nexia') | (dcng2 == 'Gentra')
       
       return qtty1[mask20], qtty2[mask21]
   

2. Use integer indices (if unpacking isn't feasible):
   If the tuple order places qnts at index 0 and models at index 1, access them with integer positions:

   def sel_models():
       data1 = load_data('gm_2020.npz')
       data2 = load_data('gm_2021.npz')
       
       qtty1 = data1[0]
       qtty2 = data2[0]
       dcng1 = data1[1]
       dcng2 = data2[1]
       
       mask20 = (dcng1 == 'Damas') | (dcng1 == 'Cobalt') | (dcng1 == 'Nexia') | (dcng1 == 'Gentra')
       mask21 = (dcng2 == 'Damas') | (dcng2 == 'Cobalt') | (dcng2 == 'Nexia') | (dcng2 == 'Gentra')
       
       return qtty1[mask20], qtty2[mask21]
   

Quick side note #

If load_data is a wrapper around numpy.load for .npz files, normally np.load returns an NpzFile object that acts like a dictionary. If that's the case, your load_data function might be modifying the return value (e.g., converting it to a tuple with .values()). Double-check the load_data implementation if you're still stuck!

内容的提问来源于stack exchange，提问作者okiljon olimjonov