大约有 11,000 项符合查询结果（耗时：0.0222秒） [XML]
How can I find out the total physical memory (RAM) of my linux box suitable to be parsed by a shell
...is a much more universal pattern matching language (i.e. you can use it in Python or Perl as well). If you learn awk, all you've already is awk. If you lean grep + PCRE on the other hand... grep -oP '^MemTotal:\s+\K.*' /proc/meminfo
– Gabriel Totusek
Aug 10 '1...
Best way to strip punctuation from a string
...g to beat
s.translate(None, string.punctuation)
For higher versions of Python use the following code:
s.translate(str.maketrans('', '', string.punctuation))
It's performing raw string operations in C with a lookup table - there's not much that will beat that but writing your own C code.
If s...
How to extract text from a PDF? [closed]
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For python, there is PDFMiner and pyPDF2. For more information on these, see Python module for converting PDF to text.
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Install a Python package into a different directory using pip?
...nstall-option to multiple times to add any of the options you can use with python setup.py install (--prefix is probably what you want, but there are a bunch more options you could use).
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How do I profile memory usage in Python?
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This one has been answered already here: Python memory profiler
Basically you do something like that (cited from Guppy-PE):
>>> from guppy import hpy; h=hpy()
>>> h.heap()
Partition of a set of 48477 objects. Total size = 3265516 bytes.
Index C...
Python: List vs Dict for look up table
... true for very large sets/dicts. The worst case scenario according to wiki.python.org/moin/TimeComplexity is O(n). I guess it depends on the internal hashing implementation at what point the average time diverges from O(1) and starts converging on O(n). You can help the lookup performance by compart...
Best practice to run Linux service as a different user
...unuser -
more on this later.
Jonathan Leffler is right:
there is setuid in Python:
import os
os.setuid(501) # UID of my_user is 501
I still don't think you can setuid
from inside a JVM, however.
Neither su nor runuser
gracefully handle the case where you
ask to run a command as the user you
alrea...
How do you set your pythonpath in an already-created virtualenv?
...DIT #2
The right answer is @arogachev's one.
If you want to change the PYTHONPATH used in a virtualenv, you can add the following line to your virtualenv's bin/activate file:
export PYTHONPATH="/the/path/you/want"
This way, the new PYTHONPATH will be set each time you use this virtualenv.
ED...
Python: How to get stdout after running os.system? [duplicate]
...books too. But take into account that the current working directory of the Python subprocess may differ, you may want to set the cwd argument to subprocess.check_output().
– Martijn Pieters♦
Mar 18 at 11:30
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Copy file or directories recursively in Python
Python seems to have functions for copying files (e.g. shutil.copy ) and functions for copying directories (e.g. shutil.copytree ) but I haven't found any function that handles both. Sure, it's trivial to check whether you want to copy a file or a directory, but it seems like a strange omission.
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