'generator' object is not subscriptable
时间: 2023-09-29 10:06:52 浏览: 47
This error message typically occurs when you attempt to access an element of a generator object using indexing or slicing notation, which is not supported by generator objects.
Generator objects are a type of iterable that generates values on-the-fly as they are needed, rather than storing them all in memory at once. Because they do not preallocate all elements in memory, generator objects cannot be accessed using indexing or slicing.
To access the elements of a generator object, you can use a loop or the next() function. For example:
```
gen = (x**2 for x in range(5))
for val in gen:
print(val)
```
This will print:
```
0
1
4
9
16
```
Alternatively, you can use the next() function to retrieve the next element of the generator object. For example:
```
gen = (x**2 for x in range(5))
print(next(gen)) # prints 0
print(next(gen)) # prints 1
print(next(gen)) # prints 4
```
Note that once you have exhausted all the values in the generator object, calling next() will raise a StopIteration exception.