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Why does Pycharm's inspector complain about “d = {}”?
...:
dic = {}
dic['aaa'] = 5
as you could have written
dic = {'aaa': 5}
BTW: The fact that the error goes away if you use the function doesn't necessarily mean that pycharm believes dict() is a literal. It could just mean that it doesn't complain for:
dic = dict()
dic['aaa'] = 5
HTH!
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Covariance and contravariance real world example
I'm having a little trouble understanding how I would use covariance and contravariance in the real world.
9 Answers
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Remove border from IFrame
How would I remove the border from an iframe embedded in my web app? An example of the iframe is:
25 Answers
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How can I open multiple files using “with open” in Python?
... time, iff I can write to all of them. I'm wondering if I somehow can combine the multiple open calls with the with statement:
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split string only on first instance - java
I want to split a string by '=' charecter. But I want it to split on first instance only. How can I do that ? Here is a JavaScript example for '_' char but it doesn't work for me
split string only on first instance of specified character
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Do you need to use path.join in node.js?
as everyone knows Windows does paths with backslashes where Unix does paths with forward slashes. node.js provides path.join() to always use the correct slash. So for example instead of writing the Unix only 'a/b/c' you would do path.join('a','b','c') instead.
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What exactly does the post method do?
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post :post causes the Runnable to be added to the message queue,
Runnable : Represents a command that can be executed. Often used to run code in a different Thread.
run () : Starts executing the active part of the class' code. This method is called ...
How do I find numeric columns in Pandas?
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AnandAnand
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Server.UrlEncode vs. HttpUtility.UrlEncode
Is there a difference between Server.UrlEncode and HttpUtility.UrlEncode?
6 Answers
6
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What exactly does += do in python?
...sent. The __iadd__ method of a class can do anything it wants. The list object implements it and uses it to iterate over an iterable object appending each element to itself in the same way that the list's extend method does.
Here's a simple custom class that implements the __iadd__ special method...