大约有 9,000 项符合查询结果（耗时：0.0293秒） [XML]
How do I pass a variable by reference?
The Python documentation seems unclear about whether parameters are passed by reference or value, and the following code produces the unchanged value 'Original'
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Feedback on using Google App Engine? [closed]
...rty side project. I like the fact that the Google App Engine is running on Python with Django built right in - gives me an excuse to try that platform... but my question is this:
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Is there a generator version of `string.split()` in Python?
..., 'test']
edit: I have just confirmed that this takes constant memory in python 3.2.1, assuming my testing methodology was correct. I created a string of very large size (1GB or so), then iterated through the iterable with a for loop (NOT a list comprehension, which would have generated extra memo...
Why is Everyone Choosing JSON Over XML for jQuery? [closed]
...but for basic data interchange, JSON is much more compact and direct. As a Python developer, there is no impedance mismatch between the simple data types in JSON and in Python. So if I was writing a server-side handler for an AJAX query that was asking about snow conditions for a particular Ski reso...
When should I use uuid.uuid1() vs. uuid.uuid4() in python?
...was Postgres' uuid_generate_v1mc() function. I've since used the following python equivalent:
from os import urandom
from uuid import uuid1
_int_from_bytes = int.from_bytes # py3 only
def uuid1mc():
# NOTE: The constant here is required by the UUIDv1 spec...
return uuid1(_int_from_bytes(u...
UnicodeDecodeError: 'charmap' codec can't decode byte X in position Y: character maps to
I'm trying to get a Python 3 program to do some manipulations with a text file filled with information. However, when trying to read the file I get the following error:
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Display help message with python argparse when script is called without any arguments
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@NunoAndré thanks - updated the answer. Feels more pythonic indeed.
– Ievgen Popovych
Jul 23 '18 at 14:40
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Why can't non-default arguments follow default arguments?
...is you", b="True"):
... print a,b,x,y
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Reference O'Reilly - Core-Python
Where as this function make use of the default arguments syntactically correct for above function calls.
Keyword arguments calling prove useful for being a...
adding directory to sys.path /PYTHONPATH
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This is working as documented. Any paths specified in PYTHONPATH are documented as normally coming after the working directory but before the standard interpreter-supplied paths. sys.path.append() appends to the existing path. See here and here. If you want a particular direc...
What would be C++ limitations compared C language? [closed]
...tive C' and 'call the Java java.util.Queue class using JNI' or 'call the CPython library' - Objective C actually is a proper superset of C (including C99), and Java and CPython libraries both are callable directly from C without having to port unrelated code to the C++ language.
Of course you cou...