python-2.7 Archives - IT Nursery

Programming, Python

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AttributeError(“‘str’ object has no attribute ‘read'”)

In Python I’m getting an error: Exception: (<type 'exceptions.AttributeError'>, AttributeError("'str' object has no attribute 'read'",), <traceback object at 0x1543ab8>) Given python code: def ...

June 3, 2022
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Programming, Python

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What does from future import absolute_import actually do?

I have answered a question regarding absolute imports in Python, which I thought I understood based on reading the Python 2.5 changelog and ...

June 3, 2022
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Programming, Python

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ImportError: numpy.core.multiarray failed to import

I’m trying to run this program import cv2 import time cv.NamedWindow("camera", 1) capture = cv.CaptureFromCAM(0) while True: img = cv.QueryFrame(capture) cv.ShowImage("camera", img) if ...

June 3, 2022
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Programming, Python

IT Nursery

How to get the latest file in a folder?

I need to get the latest file of a folder using python. While using the code: max(files, key = os.path.getctime) I am getting ...

June 2, 2022
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Programming, Python

IT Nursery

Why is early return slower than else?

This is a follow-up question to an answer I gave a few days back. Edit: it seems that the OP of that question ...

June 1, 2022
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Programming, Python

IT Nursery

What do ellipsis […] mean in a list?

I was playing around in python. I used the following code in IDLE: p = [1, 2] p[1:1] = [p] print p The ...

May 31, 2022
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Programming, Python

IT Nursery

“OSError: [Errno 1] Operation not permitted” when installing Scrapy in OSX 10.11 (El Capitan) (System Integrity Protection)

I’m trying to install Scrapy Python framework in OSX 10.11 (El Capitan) via pip. The installation script downloads the required modules and at ...

May 29, 2022
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Programming, Python

IT Nursery

How to use pip with Python 3.x alongside Python 2.x

I installed Python 3.x (besides Python 2.x on Ubuntu) and slowly started to pair modules I use in Python 2.x. So I wonder, ...

May 29, 2022
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Programming, Python

IT Nursery

What is a good practice to check if an environmental variable exists or not?

I want to check my environment for the existence of a variable, say "FOO", in Python. For this purpose, I am using the ...

May 28, 2022
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Programming, Python

IT Nursery

Python ‘If not’ syntax [duplicate]

This question already has answers here: Why is “if not someobj:” better than “if someobj == None:” in Python? (9 answers) Closed 9 ...

May 28, 2022
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