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I m getting an IndentationError (or a TabError). How do I fix it? (6 answers)

Closed 25 days ago.

昨天,我尝试了一些网站MOOC,其中涉及一些方案拟定任务。我正试图解决一个容易的问题,但我无法理解为什么我仍会遇到这样的错误:

    In [32]: import A1Part3
  File "A1Part3.py", line 26
    t = np.arrange(x.size/N)
    ^
IndentationError: unexpected indent

I do not understand why, I was reading about python indentation, and as far I know if some statement is indented inside the block above it should consider part of that function. I don t know what I m doing wrong or what I am misunderstanding.

    """
A1-Part-3: Python array indexing

Write a function that given a numpy array x, returns every Nth element in x, starting from the
first element.

The input arguments to this function are a numpy array x and a positive integer N such that N < number of
elements in x. The output of this function should be a numpy array.

If you run your code with x = np.arange(10) and N = 2, the function should return the following output:
[0, 2, 4, 6, 8].
"""

import numpy as np


def hopSamples(x,N):
    """
    Inputs:
        x: input numpy array
        N: a positive integer, (indicating hop size)
    Output:
        A numpy array containing every Nth element in x, starting from the first element in x.
    """
    ## Your code here
    t = np.arrange(x.size/N)
    cont = 0
    i = 0
    while cont<x.size :
          cont+=N
          t[i]=x[cont]
          i=i+1
    return t

Answer 1

You have a tab character on that line, and Python expands tabs to 8 spaces. The preceding line however only uses spaces, so it is rated at 4 characters indent:

>>>    
...     ## Your code here       
...     t = np.arrange(x.size/N)
...    
     ## Your code here	
	t = np.arrange(x.size/N)
 
>>> #                 ^^  ^^

/code>. 越航顺序是其中的表格。由于一个表格被扩大至8个空间,你实际上比前线更宽松了这条线。

你们不应在新的法宝中使用制片。仅使用空间。没收你的编辑使用场所进行登革热(多数编辑将使用空间,即使你用上表钥匙)。

Run your code through python -tt scriptname.py to have Python tell you about any other places you are mixing tabs and spaces, and correct them all.

Answer 2

在我的电脑中,除第一行的登革热外,你的代码是行的。

But even if your code get any indentation error, I suggest you to replace tabs by four spaces.

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