大约有 11,000 项符合查询结果（耗时：0.0271秒） [XML]
find first sequence item that matches a criterion [duplicate]
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Python next()
– Jonathon Reinhart
Oct 19 '13 at 4:29
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When and why should I use a namedtuple instead of a dictionary? [duplicate]
... you used the same keys in each one, but assuming you will have only valid Python identifiers as keys and don't need mutability,
mynamedtuple.fieldname
is prettier than
mydict['fieldname']
and
mynamedtuple = MyNamedTuple(firstvalue, secondvalue)
is prettier than
mydict = {'fieldname': fir...
Loop through list with both content and index [duplicate]
It is very common for me to loop through a python list to get both the contents and their indexes. What I usually do is the following:
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jupyter notebook选择conda环境 - C/C++ - 清泛网 - 专注C/C++及内核技术
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conda install ipykernel
将环境写入notebook的kernel中
python -m ipykernel install --user --name 环境名称 --display-name "Python (环境名称)"
然后打开notebook
jupyter notebook
浏览器打开对应地址，新建python，就会有对应的环境提示了.jupy...
Rename an environment with virtualenvwrapper
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I just tried this and it created the "copy" with python2.7, even though the oldenv I was trying to copy used python3.7..... sad.
– Leo
Aug 28 at 0:26
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Can't connect to MySQL server error 111 [closed]
I installed mysql server on linux box IP = 192.168.1.100 but when i try to connect to this IP it alway error(111). but use localhost and 127.0.0.1 is OK.
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ERROR 2003 (HY000): Can't connect to MySQL server on '127.0.0.1' (111)
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in the terminal on mac and linux. I believe it is the same in windows CMD but I am not certain.
– Henry
Feb 7 '18 at 20:45
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How to find out where a function is defined?
... doing so (I would recomend Eclipse PDT), or you can allways grep it if on Linux, or using wingrep. In Linux it would be something like:
grep -R "function funName" *
from within the root folder of the project.
share
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How can one pull the (private) data of one's own Android app?
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Python alternative for where openssl has not been compiled with zlib: dd if=data.ab bs=1 skip=24 | python -c "import zlib,sys;sys.stdout.write(zlib.decompress(sys.stdin.read()))" | tar -xvf - (from above source)
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How to pass a user defined argument in scrapy spider
...www.example.com/{category}'] # py36
super().__init__(**kwargs) # python3
def parse(self, response)
self.log(self.domain) # system
Taken from the Scrapy doc: http://doc.scrapy.org/en/latest/topics/spiders.html#spider-arguments
Update 2013: Add second argument
Update 2015: ...