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Web scraping with Python [closed]
...se/sunset times from a web site. Is it possible to scrape web content with Python? what are the modules used? Is there any tutorial available?
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What makes Lisp macros so special?
...(e.g. Infix Notation Math for Clojure).
Here is a more concrete example:Python has list comprehensions built into the language. This gives a simple syntax for a common case. The line
divisibleByTwo = [x for x in range(10) if x % 2 == 0]
yields a list containing all even numbers between 0 and ...
builtins.TypeError: must be str, not bytes
I've converted my scripts from Python 2.7 to 3.2, and I have a bug.
2 Answers
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What's the difference between a Python “property” and “attribute”?
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Properties are a special kind of attribute. Basically, when Python encounters the following code:
spam = SomeObject()
print(spam.eggs)
it looks up eggs in spam, and then examines eggs to see if it has a __get__, __set__, or __delete__ method — if it does, it's a property. If...
Make sure only a single instance of a program is running
Is there a Pythonic way to have only one instance of a program running?
20 Answers
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Python append() vs. + operator on lists, why do these give different results?
...Little history
For fun, a little history: the birth of the array module in Python in February 1993. it might surprise you, but arrays were added way after sequences and lists came into existence.
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Is it Pythonic to use list comprehensions for just side effects?
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It is very anti-Pythonic to do so, and any seasoned Pythonista will give you hell over it. The intermediate list is thrown away after it is created, and it could potentially be very, very large, and therefore expensive to create.
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How can I detect if a browser is blocking a popup?
...specific situation. I have to download multiple files which are generating PDF files from HTML. And if the HTML contents are large, sometimes it takes several seconds and if I use window.location for it, if the first file takes too long to generate, it will be ignored when the second request started...
Difference between __getattr__ vs __getattribute__
...ily.
New-style classes derive from object, old-style classes are those in Python 2.x with no explicit base class. But the distinction between old-style and new-style classes is not the important one when choosing between __getattr__ and __getattribute__.
You almost certainly want __getattr__.
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What is a provisioning profile used for when developing iPhone applications?
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A Quote from : iPhone Developer Program (~8MB PDF)
A provisioning profile is a collection of digital entities that uniquely ties developers and devices to an authorized iPhone Development Team and enables a device to be used for testing. A Development Provisioning Pr...