Python3.6.4缩进错误及人脸识别代码运行异常求助

Hey there, that unindent does not match any outer indentation level error is super common in Python—it’s all about messed-up indentation (Python takes this very seriously!). Let’s break down what’s wrong with your code and fix it step by step:

Key Issues in Your Original Code #

• Malformed import statements: You tried to cram multiple import commands onto a single line, which isn’t valid Python syntax.
• Incorrect indentation: The code inside your getImagesWithID function wasn’t properly indented—Python requires consistent indentation (stick with 4 spaces, never mix spaces and tabs!).
• Python2 vs Python3 print syntax: print imagePaths is Python2 syntax; in Python3, print is a function, so you need parentheses: print(imagePaths).
• Function name typo: You defined getImagesWithID but tried to call getImageWithID (missing an s at the end).

Corrected Code #

import os
import cv2
import numpy as np
from PIL import Image

recognizer = cv2.face.LBPHFaceRecognizer_create()
path = 'dataSet'

def getImagesWithID(path):
    # Properly indent the function body with 4 spaces
    imagePaths = [os.path.join(path, f) for f in os.listdir(path)]
    print(imagePaths)  # Python3-compliant print function syntax

# Call the correctly named function
getImagesWithID(path)

Quick Tips to Avoid This Error Later #

• Always use 4 spaces for indentation (most code editors let you set Tab to insert 4 spaces automatically).
• Turn on "show whitespace" in your editor to spot mixed spaces/tabs easily—this is a top culprit for indent errors.
• Double-check function names when calling them—typos are easy to miss but break code fast!
• Keep Python3 syntax rules in mind (like print() as a function) since you’re running Python 3.6.4.

内容的提问来源于stack exchange，提问作者Muhammad Adnan