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MongoDB数据导出导入工具：mongoexport,mongoimport - 大数据 & AI - 清泛...
...to lock the data directory, so cannot be used
if a mongod is currently accessing the same path
--directoryperdb if dbpath specified, each db is in a separate
directory
--journal enable journaling
-d [ --db ] ...
Stop pip from failing on single package when installing with requirements.txt
...out the -a flag, consider < requirements.txt xargs -n 1 pip install, or if you don't like the redirect at the front, xargs -n 1 pip install < requirements.txt. :-)
– torek
Jul 6 at 17:21
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How do I create a constant in Python?
...t declare a variable or value as constant in Python. Just don't change it.
If you are in a class, the equivalent would be:
class Foo(object):
CONST_NAME = "Name"
if not, it is just
CONST_NAME = "Name"
But you might want to have a look at the code snippet Constants in Python by Alex Martelli.
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How to pass a user defined argument in scrapy spider
...
The above code is only partially working for me. For eg. If I define domain using self.domain, I'm still not able to access it outside the __init__ method. Python throws a not defined error. BTW, why have you omitted the super call? PS. I'm working with the CrawlSpider class
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How to use putExtra() and getExtra() for string data
...Actually I have a string variable, say str, which stores some string data. Now, I want to send this data from one activity to another activity.
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What is the difference between user and kernel modes in operating systems?
...inology).
Entered with the svc instruction (SuperVisor Call), previously known as swi before unified assembly, which is the instruction used to make Linux system calls. Hello world ARMv8 example:
hello.S
.text
.global _start
_start:
/* write */
mov x0, 1
ldr x1, =msg
ldr x2, =len
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How can I read a function's signature including default argument values?
...
If a function has argument annotations or keyword only arguments (= if you are using Python 3) you have to call getfullargspec instead. (ValueError: Function has keyword-only arguments or annotations, use getfullargspec() API...
How to manage local vs production settings in Django?
...sed in both, but some of them (like paths to static files) need to remain different, and hence should not be overwritten every time the new code is deployed.
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Where is JAVA_HOME on macOS Mojave (10.14) to Lion (10.7)?
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Good to know. I have to say im not too thrilled with the feature list for Lion. There doesnt seem to much there in the way of enhancements for my usage...
– prodigitalson
Jul 6 '11 at 2:29
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Automapper: Update property values without creating a new object
...= new dest
{
//initialize properties
}
_mapper.Map(src, dest);
dest will now be updated with all the property values from src that it shared. The values of its unique properties will remain the same.
Here's the relevant source code
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