大约有 30,000 项符合查询结果(耗时:0.0684秒) [XML]
How to get the current time in Python
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Which version of Python was the original answer given in? Just typing datetime.datetime.now() in my Python 2.7 interactive console (IronPython hasn't updated yet) gives me the same behavior as the newer example using print() in the answer. I ...
How can I count the occurrences of a list item?
Given an item, how can I count its occurrences in a list in Python?
25 Answers
25
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What does the “yield” keyword do?
What is the use of the yield keyword in Python, and what does it do?
42 Answers
42
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Why is __init__() always called after __new__()?
...r tuple.
From April 2008 post: When to use __new__ vs. __init__? on mail.python.org.
You should consider that what you are trying to do is usually done with a Factory and that's the best way to do it. Using __new__ is not a good clean solution so please consider the usage of a factory. Here you h...
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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py2exe - generate single executable file
... Please note that as of version 1.4, PyInstaller doesn't support Python 2.6+ on Windows
– Joril
Mar 9 '11 at 8:08
2
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Get Output From the logging Module in IPython Notebook
When I running the following inside IPython Notebook I don't see any output:
8 Answers
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Capture Image from Camera and Display in Activity
...ining a Button with id button1 and an ImageView with id imageview1:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_par...
python: how to identify if a variable is an array or a scalar
... sure, but avoid type, and also check not isinstance(x, (str, unicode)) on Python 2
– jamylak
Feb 10 '15 at 11:04
Why ...
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...
