how to run on array of string in nested loop in python

Question

I try to run this code (small part of my program) I fixed and added whitespaces and now I get new error, maybe this array does not fit to string?

arrayOfPhotos = ["1.jpg", "2.jpg", "3.jpg", "4.jpg"]

for name in arrayOfPhotos:
  detections = detector.detectObjectsFromImage(input_image=arrayOfPhotos[name], output_image_path="holo3-detected.jpg")

  for detection in detections: 
    print(arrayOfPhotos[name], " : ", detection["percentage_probability"])

I get the error:

Traceback (most recent call last):
  File "dTEST.py", line 13, in <module>
    detections = detector.detectObjectsFromImage(input_image=arrayOfPhotos[name], output_image_path="holo3-detected.jpg")
TypeError: list indices must be integers or slices, not str

Can you help me?

Line which causes error expected to be indented. – Olvin Roght Aug 30 '20 at 10:48 — Olvin Roght, Aug 30 '20 at 10:48

Adrian Mester · Answer 1 · 2020-08-30T15:05:24.810

1

what you probably want is this:

arrayOfPhotos = ["1.jpg", "2.jpg", "3.jpg", "4.jpg"]

for name in arrayOfPhotos:
  detections = detector.detectObjectsFromImage(input_image=arrayOfPhotos[name], output_image_path="holo3-detected.jpg")

  for detection in detections: 
    print(arrayOfPhotos[name], " : ", detection["percentage_probability"])

whitespace is important in python, for a statement to be part of a loop it needs to be indented vs the loop (I've added 2 spaces before the lines)

edit: the OP edited the question.

replace input_image=arrayOfPhotos[name] with input_image=name

edited Aug 30 '20 at 15:05

answered Aug 30 '20 at 10:54

Adrian Mester

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Why do you use 2 spaces? [PEP8](https://www.python.org/dev/peps/pep-0008/#indentation) recommend to use 4. – Olvin Roght Aug 30 '20 at 10:57
@Olvin Roght Personal preference. Some people use tab characters, I use four spaces myself. – AwesomeCronk Aug 30 '20 at 11:03
The question clearly shows a `TypeError` rather than an `IndentationError`, so I don't see how this answer is relevant. – ekhumoro Aug 30 '20 at 11:51
@ekhumoro The question's edit history clearly shows an `IndentationError`. – superb rain Aug 30 '20 at 12:53
@superbrain Exactly - it's history, so not relevant. – ekhumoro Aug 30 '20 at 16:11
@ekhumoro Not sure I follow. Are you blaming the answerer instead of the question vandalizer? – superb rain Aug 30 '20 at 16:16
@superbrain My comment was meant to prompt an update to this answer - which it did. – ekhumoro Aug 30 '20 at 19:16

score 0 · Answer 2 · answered Aug 30 '20 at 19:34

arrayOfPhotos = ["1.jpg", "2.jpg", "3.jpg", "4.jpg"]

for name in arrayOfPhotos:
    detections = detector.detectObjectsFromImage(input_image=name, output_image_path="holo3-detected.jpg")

    for detection in detections: 
        print(name, " : ", detection["percentage_probability"])

The array of photos is a list not a dictionary...

how to run on array of string in nested loop in python

2 Answers2