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How do I get a list of column names from a psycopg2 cursor?
...rk Lutz:
curs.execute("Select * FROM people LIMIT 0")
colnames = [desc[0] for desc in curs.description]
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Named routes _path vs _url
... to the app on the server. They should mainly be used when providing links for external use. (Think email links, RSS, and things like the copy and paste URL field under a YouTube video's "Share" section.)
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How to get method parameter names?
...module - this will do the inspection of the various code object properties for you.
>>> inspect.getfullargspec(a_method)
(['arg1', 'arg2'], None, None, None)
The other results are the name of the *args and **kwargs variables, and the defaults provided. ie.
>>> def foo(a, b, c=...
中文网（自研/维护）拓展 · App Inventor 2 中文网
...ls：个性化状态栏拓展
AI2Utils
Component for AI2Utils
属性
None
事件
None
方法
FindContactsByName(name,fuzzyMatch)
通过姓名查找通讯录，返回 (联系人,手机号) 的...
In-memory size of a Python structure
Is there a reference for the memory size of Python data stucture on 32- and 64-bit platforms?
7 Answers
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How do JavaScript closures work?
...ript closures to someone with a knowledge of the concepts they consist of (for example functions, variables and the like), but does not understand closures themselves?
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How do I create an average from a Ruby array?
...| sum + el }.to_f / arr.size
=> 6.5
Note the .to_f, which you'll want for avoiding any problems from integer division. You can also do:
arr = [5, 6, 7, 8]
arr.inject(0.0) { |sum, el| sum + el } / arr.size
=> 6.5
You can define it as part of Array as another commenter has suggested, but yo...
Empty set literal?
...
No, there's no literal syntax for the empty set. You have to write set().
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Multiple columns index when using the declarative ORM extension of sqlalchemy
...clare it, everything works the same (make sure you're on recent 0.6 or 0.7 for the declarative A.a wrapper to be interpreted as a Column after the class declaration is complete):
class A(Base):
__tablename__ = 'table_A'
id = Column(Integer, primary_key=True)
a = Column(String(32))
b...
Can I serve multiple clients using just Flask app.run() as standalone?
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flask.Flask.run accepts additional keyword arguments (**options) that it forwards to werkzeug.serving.run_simple - two of those arguments are threaded (a boolean) and processes (which you can set to a number greater than one to have werkzeug spawn more than one process to handle requests).
thread...