大约有 6,400 项符合查询结果（耗时：0.0220秒） [XML]
How do I get a list of column names from a psycopg2 cursor?
...umn labels directly from the selected column names, and recall seeing that python's psycopg2 module supports this feature.
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TypeError: method() takes 1 positional argument but 2 were given
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In Python, this:
my_object.method("foo")
...is syntactic sugar, which the interpreter translates behind the scenes into:
MyClass.method(my_object, "foo")
...which, as you can see, does indeed have two arguments - it's just...
In Python how should I test if a variable is None, True or False
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Agreed. Much more pythonic than the evidently more popular solution above (which smells too much like C code).
– Brandon
Jan 7 '10 at 13:53
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What are some (concrete) use-cases for metaclasses?
...ling to actually change these values. Maybe David Beazley can.
Anyway, in Python 3, metaclasses also have the __prepare__ method, which lets you evaluate the class body into a mapping other than a dict, thus supporting ordered attributes, overloaded attributes, and other wicked cool stuff:
import ...
How can I include a YAML file inside another?
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Your question does not ask for a Python solution, but here is one using PyYAML.
PyYAML allows you to attach custom constructors (such as !include) to the YAML loader. I've included a root directory that can be set so that this solution supports relative and...
Chrome can't load web worker
...e a more general solution for it. Instead of installing wamp or xamp, with python you can navigate to the folder your project is hosted in and type: python -m http.server
Just that and you will have a running server on that folder, reachable from localhost.
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Python - abs vs fabs
I noticed that in python there are two similar looking methods for finding the absolute value of a number:
4 Answers
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Reading an Excel file in python using pandas
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Here is an updated method with syntax that is more common in python code. It also prevents you from opening the same file multiple times.
import pandas as pd
sheet1, sheet2 = None, None
with pd.ExcelFile("PATH\FileName.xlsx") as reader:
sheet1 = pd.read_excel(reader, sheet_name='...
Most Pythonic way to provide global configuration variables in config.py? [closed]
...ndless quest in over-complicating simple stuff, I am researching the most 'Pythonic' way to provide global configuration variables inside the typical ' config.py ' found in Python egg packages.
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Peak-finding algorithm for Python/SciPy
... that only works on those particular images. I adapted a MATLAB script to Python and it works decently.
– endolith
Dec 17 '09 at 18:30
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