为什么我在这里得到“ IndentationError：预期缩进的块”？

Question

What the header says. I'm working in a Pythin 3 Jupyter Notebook.

The code:

image[0].save(out_fname, save_all = True, quality=100, append_images = images[1:])

The error:

File "<ipython-input-22-976c7de2f57a>", line 8
    image[0].save(out_fname, save_all = True, quality=100, append_images = images[1:])
        ^
IndentationError: expected an indented block

EDIT: Here's the rest of the cell.

image = []
for i in range(min_range, max_range + 1):

image[0].save(out_fname, save_all = True, quality=100, append_images = images[1:])

Double edit: Attempting to tab the last line results in a "list index out of range" error.

Answer 1

Python requires indentation as part of its syntax. When declaring a for loop, an indentation tells Python that the code belongs to the loop.

Changing

for i in range(min_range, max_range + 1):
image[0].save(out_fname, save_all = True, quality=100, append_images = images[1:])

to

for i in range(min_range, max_range + 1):
    image[0].save(out_fname, save_all = True, quality=100, append_images = images[1:])

should fix your issue.