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Design by contract using assertions or exceptions? [closed]
...ssertion failing. In this document (martinfowler.com/ieeeSoftware/failFast.pdf), Jim Shore points out, "Remember, an error that occurs at the customer’s site made it through your testing process. You’ll probably have trouble reproducing it. These errors are the hardest to find, and a well-placed...
Why doesn't os.path.join() work in this case?
...d an "absolute path" and everything before them is discarded.
Quoting the Python docs for os.path.join:
If a component is an absolute path, all previous components are thrown away and joining continues from the absolute path component.
Note on Windows, the behaviour in relation to drive lette...
Combine Date and Time columns using python pandas
I have a pandas dataframe with the following columns;
11 Answers
11
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In pure functional languages, is there an algorithm to get the inverse function?
...or based approaches as well: iai.uni-bonn.de/~jv/ssgip-bidirectional-final.pdf
– sclv
Nov 22 '12 at 4:50
And just to m...
Can you list the keyword arguments a function receives?
...argdict) and not invalidArgs(func, argdict)
(This is good only as far as python's arg parsing. Any runtime checks for invalid values in kwargs obviously can't be detected.)
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How to remove an element from a list by index
How do I remove an element from a list by index in Python?
18 Answers
18
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psycopg2: insert multiple rows with one query
...ues (
cursor, insert_query, data, template=None, page_size=100
)
The pythonic way of doing it in Psycopg 2.6:
data = [(1,'x'), (2,'y')]
records_list_template = ','.join(['%s'] * len(data))
insert_query = 'insert into t (a, b) values {}'.format(records_list_template)
cursor.execute(insert_quer...
Two way/reverse map [duplicate]
I'm doing this switchboard thing in python where I need to keep track of who's talking to whom, so if Alice --> Bob, then that implies that Bob --> Alice.
...
Inherit from a generic base class, apply a constraint, and implement an interface in C#
...if you are a professional C# developer, you should already have C# spec in PDF format on your machine. Also, I don't mean to criticize you either. I was not used to reading spec earlier but I have started reading it thanks to Jon, Eric and Pavel who always quotes C# spec for any question. I found th...
C# Xml中SelectSingleNode方法中的xpath用法（Xml节点操作最佳方式） - 更...
...返回单个节点可使用SelectSingleNode方法，该方法如果查询到一个或多个节点，返回第一个节点；如果没有查询的任何节点返回 Nothing。例如：
objNode = objNode.SelectSingleNode("/Company/Department/Employees/Employee")
if (objNode == null)
// - Do p...